C:\Users\kisgcsa\Work\tools\jdk\11.0.6-win64-certs\bin\java.exe -agentlib:jdwp=transport=dt_socket,address=127.0.0.1:52001,suspend=y,server=n -javaagent:C:\Users\kisgcsa\.IdeaIC2019.3\system\captureAgent\debugger-agent.jar -Dfile.encoding=UTF-8 -classpath "C:\Users\kisgcsa\Work\git\trial\sse\target\classes;C:\Users\kisgcsa\.m2\repository\org\springframework\boot\spring-boot-starter-web\2.3.1.RELEASE\spring-boot-starter-web-2.3.1.RELEASE.jar;C:\Users\kisgcsa\.m2\repository\org\springframework\boot\spring-boot-starter\2.3.1.RELEASE\spring-boot-starter-2.3.1.RELEASE.jar;C:\Users\kisgcsa\.m2\repository\org\springframework\boot\spring-boot\2.3.1.RELEASE\spring-boot-2.3.1.RELEASE.jar;C:\Users\kisgcsa\.m2\repository\org\springframework\boot\spring-boot-autoconfigure\2.3.1.RELEASE\spring-boot-autoconfigure-2.3.1.RELEASE.jar;C:\Users\kisgcsa\.m2\repository\org\springframework\boot\spring-boot-starter-logging\2.3.1.RELEASE\spring-boot-starter-logging-2.3.1.RELEASE.jar;C:\Users\kisgcsa\.m2\repository\ch\qos\logback\logback-classic\1.2.3\logback-classic-1.2.3.jar;C:\Users\kisgcsa\.m2\repository\ch\qos\logback\logback-core\1.2.3\logback-core-1.2.3.jar;C:\Users\kisgcsa\.m2\repository\org\slf4j\slf4j-api\1.7.25\slf4j-api-1.7.25.jar;C:\Users\kisgcsa\.m2\repository\org\apache\logging\log4j\log4j-to-slf4j\2.13.3\log4j-to-slf4j-2.13.3.jar;C:\Users\kisgcsa\.m2\repository\org\apache\logging\log4j\log4j-api\2.13.3\log4j-api-2.13.3.jar;C:\Users\kisgcsa\.m2\repository\org\slf4j\jul-to-slf4j\1.7.30\jul-to-slf4j-1.7.30.jar;C:\Users\kisgcsa\.m2\repository\jakarta\annotation\jakarta.annotation-api\1.3.5\jakarta.annotation-api-1.3.5.jar;C:\Users\kisgcsa\.m2\repository\org\springframework\spring-core\5.2.7.RELEASE\spring-core-5.2.7.RELEASE.jar;C:\Users\kisgcsa\.m2\repository\org\springframework\spring-jcl\5.2.7.RELEASE\spring-jcl-5.2.7.RELEASE.jar;C:\Users\kisgcsa\.m2\repository\org\yaml\snakeyaml\1.26\snakeyaml-1.26.jar;C:\Users\kisgcsa\.m2\repository\org\springframework\boot\spring-boot-starter-json\2.3.1.RELEASE\spring-boot-starter-json-2.3.1.RELEASE.jar;C:\Users\kisgcsa\.m2\repository\com\fasterxml\jackson\core\jackson-databind\2.11.0\jackson-databind-2.11.0.jar;C:\Users\kisgcsa\.m2\repository\com\fasterxml\jackson\core\jackson-annotations\2.11.0\jackson-annotations-2.11.0.jar;C:\Users\kisgcsa\.m2\repository\com\fasterxml\jackson\core\jackson-core\2.11.0\jackson-core-2.11.0.jar;C:\Users\kisgcsa\.m2\repository\com\fasterxml\jackson\datatype\jackson-datatype-jdk8\2.11.0\jackson-datatype-jdk8-2.11.0.jar;C:\Users\kisgcsa\.m2\repository\com\fasterxml\jackson\datatype\jackson-datatype-jsr310\2.11.0\jackson-datatype-jsr310-2.11.0.jar;C:\Users\kisgcsa\.m2\repository\com\fasterxml\jackson\module\jackson-module-parameter-names\2.11.0\jackson-module-parameter-names-2.11.0.jar;C:\Users\kisgcsa\.m2\repository\org\springframework\spring-web\5.2.7.RELEASE\spring-web-5.2.7.RELEASE.jar;C:\Users\kisgcsa\.m2\repository\org\springframework\spring-beans\5.2.7.RELEASE\spring-beans-5.2.7.RELEASE.jar;C:\Users\kisgcsa\.m2\repository\org\springframework\spring-webmvc\5.2.7.RELEASE\spring-webmvc-5.2.7.RELEASE.jar;C:\Users\kisgcsa\.m2\repository\org\springframework\spring-aop\5.2.7.RELEASE\spring-aop-5.2.7.RELEASE.jar;C:\Users\kisgcsa\.m2\repository\org\springframework\spring-context\5.2.7.RELEASE\spring-context-5.2.7.RELEASE.jar;C:\Users\kisgcsa\.m2\repository\org\springframework\spring-expression\5.2.7.RELEASE\spring-expression-5.2.7.RELEASE.jar;C:\Users\kisgcsa\.m2\repository\org\springframework\boot\spring-boot-starter-undertow\2.3.1.RELEASE\spring-boot-starter-undertow-2.3.1.RELEASE.jar;C:\Users\kisgcsa\.m2\repository\io\undertow\undertow-core\2.1.3.Final\undertow-core-2.1.3.Final.jar;C:\Users\kisgcsa\.m2\repository\org\jboss\logging\jboss-logging\3.4.1.Final\jboss-logging-3.4.1.Final.jar;C:\Users\kisgcsa\.m2\repository\org\jboss\xnio\xnio-api\3.8.0.Final\xnio-api-3.8.0.Final.jar;C:\Users\kisgcsa\.m2\repository\org\wildfly\common\wildfly-common\1.5.2.Final\wildfly-common-1.5.2.Final.jar;C:\Users\kisgcsa\.m2\repository\org\wildfly\client\wildfly-client-config\1.0.1.Final\wildfly-client-config-1.0.1.Final.jar;C:\Users\kisgcsa\.m2\repository\org\jboss\xnio\xnio-nio\3.8.0.Final\xnio-nio-3.8.0.Final.jar;C:\Users\kisgcsa\.m2\repository\org\jboss\threads\jboss-threads\3.1.0.Final\jboss-threads-3.1.0.Final.jar;C:\Users\kisgcsa\.m2\repository\io\undertow\undertow-servlet\2.1.3.Final\undertow-servlet-2.1.3.Final.jar;C:\Users\kisgcsa\.m2\repository\org\jboss\spec\javax\annotation\jboss-annotations-api_1.3_spec\2.0.1.Final\jboss-annotations-api_1.3_spec-2.0.1.Final.jar;C:\Users\kisgcsa\.m2\repository\io\undertow\undertow-websockets-jsr\2.1.3.Final\undertow-websockets-jsr-2.1.3.Final.jar;C:\Users\kisgcsa\.m2\repository\org\jboss\spec\javax\websocket\jboss-websocket-api_1.1_spec\2.0.0.Final\jboss-websocket-api_1.1_spec-2.0.0.Final.jar;C:\Users\kisgcsa\.m2\repository\jakarta\servlet\jakarta.servlet-api\4.0.3\jakarta.servlet-api-4.0.3.jar;C:\Users\kisgcsa\.m2\repository\org\glassfish\jakarta.el\3.0.3\jakarta.el-3.0.3.jar;C:\Users\kisgcsa\.m2\repository\io\projectreactor\reactor-core\3.3.2.RELEASE\reactor-core-3.3.2.RELEASE.jar;C:\Users\kisgcsa\.m2\repository\org\reactivestreams\reactive-streams\1.0.3\reactive-streams-1.0.3.jar;C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2019.3.4\lib\idea_rt.jar" trial.sse.Server
Connected to the target VM, address: '127.0.0.1:52001', transport: 'socket'

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.3.1.RELEASE)

2020-07-21 10:08:36.059  INFO 448 --- [           main] trial.sse.Server                         : Starting Server on BDUWLP609 with PID 448 (C:\Users\kisgcsa\Work\git\trial\sse\target\classes started by kisgcsa in C:\Users\kisgcsa\Work\git\trial\sse)
2020-07-21 10:08:36.063  INFO 448 --- [           main] trial.sse.Server                         : No active profile set, falling back to default profiles: default
2020-07-21 10:08:37.481  WARN 448 --- [           main] io.undertow.websockets.jsr               : UT026010: Buffer pool was not set on WebSocketDeploymentInfo, the default pool will be used
2020-07-21 10:08:37.506  INFO 448 --- [           main] io.undertow.servlet                      : Initializing Spring embedded WebApplicationContext
2020-07-21 10:08:37.506  INFO 448 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1371 ms
2020-07-21 10:08:37.840  INFO 448 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
2020-07-21 10:08:38.003  INFO 448 --- [           main] io.undertow                              : starting server: Undertow - 2.1.3.Final
2020-07-21 10:08:38.014  INFO 448 --- [           main] org.xnio                                 : XNIO version 3.8.0.Final
2020-07-21 10:08:38.049  INFO 448 --- [           main] org.xnio.nio                             : XNIO NIO Implementation Version 3.8.0.Final
2020-07-21 10:08:38.181  INFO 448 --- [           main] org.jboss.threads                        : JBoss Threads version 3.1.0.Final
2020-07-21 10:08:38.223  INFO 448 --- [           main] o.s.b.w.e.undertow.UndertowWebServer     : Undertow started on port(s) 8080 (http)
2020-07-21 10:08:38.236  INFO 448 --- [           main] trial.sse.Server                         : Started Server in 2.781 seconds (JVM running for 3.76)
2020-07-21 10:08:55.953  INFO 448 --- [  XNIO-1 task-1] io.undertow.servlet                      : Initializing Spring DispatcherServlet 'dispatcherServlet'
2020-07-21 10:08:55.953  INFO 448 --- [  XNIO-1 task-1] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'
2020-07-21 10:08:55.966  INFO 448 --- [  XNIO-1 task-1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 13 ms
2020-07-21 10:08:56.001  INFO 448 --- [  XNIO-1 task-1] trial.sse.SseResource                    : Sse request with id: 1
2020-07-21 10:09:21.481  INFO 448 --- [  XNIO-1 task-2] trial.sse.SseResource                    : Sse request with id: 1
2020-07-21 10:09:22.017 ERROR 448 --- [    Heartbeat-1] trial.sse.SseResource                    : SSE error

java.io.IOException: UT010029: Stream is closed
	at io.undertow.servlet.spec.ServletOutputStreamImpl.write(ServletOutputStreamImpl.java:138) ~[undertow-servlet-2.1.3.Final.jar:2.1.3.Final]
	at java.base/sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:233) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:312) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:316) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) ~[na:na]
	at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:254) ~[na:na]
	at org.springframework.util.StreamUtils.copy(StreamUtils.java:147) ~[spring-core-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:122) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:44) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:227) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.sendInternal(ResponseBodyEmitterReturnValueHandler.java:210) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.send(ResponseBodyEmitterReturnValueHandler.java:203) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.sendInternal(ResponseBodyEmitter.java:189) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.send(ResponseBodyEmitter.java:183) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:126) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:109) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:90) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at trial.sse.SseResource.lambda$startStream$0(SseResource.java:32) ~[classes/:na]
	at reactor.core.publisher.FluxHandle$HandleSubscriber.onNext(FluxHandle.java:96) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.publisher.FluxInterval$IntervalRunnable.run(FluxInterval.java:123) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.call(PeriodicWorkerTask.java:59) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.run(PeriodicWorkerTask.java:73) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset$$$capture(FutureTask.java:305) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java) ~[na:na]
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
	at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]

2020-07-21 10:09:28.275  INFO 448 --- [  XNIO-1 task-1] trial.sse.SseResource                    : Sse request with id: 1
2020-07-21 10:09:28.482 ERROR 448 --- [    Heartbeat-1] trial.sse.SseResource                    : SSE error

java.io.IOException: UT010029: Stream is closed
	at io.undertow.servlet.spec.ServletOutputStreamImpl.write(ServletOutputStreamImpl.java:138) ~[undertow-servlet-2.1.3.Final.jar:2.1.3.Final]
	at java.base/sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:233) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:312) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:316) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) ~[na:na]
	at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:254) ~[na:na]
	at org.springframework.util.StreamUtils.copy(StreamUtils.java:147) ~[spring-core-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:122) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:44) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:227) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.sendInternal(ResponseBodyEmitterReturnValueHandler.java:210) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.send(ResponseBodyEmitterReturnValueHandler.java:203) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.sendInternal(ResponseBodyEmitter.java:189) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.send(ResponseBodyEmitter.java:183) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:126) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:109) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:90) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at trial.sse.SseResource.lambda$startStream$0(SseResource.java:32) ~[classes/:na]
	at reactor.core.publisher.FluxHandle$HandleSubscriber.onNext(FluxHandle.java:96) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.publisher.FluxInterval$IntervalRunnable.run(FluxInterval.java:123) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.call(PeriodicWorkerTask.java:59) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.run(PeriodicWorkerTask.java:73) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset$$$capture(FutureTask.java:305) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java) ~[na:na]
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
	at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]

2020-07-21 10:09:30.801  INFO 448 --- [  XNIO-1 task-2] trial.sse.SseResource                    : Sse request with id: 1
2020-07-21 10:09:31.276 ERROR 448 --- [    Heartbeat-1] trial.sse.SseResource                    : SSE error

java.io.IOException: UT010029: Stream is closed
	at io.undertow.servlet.spec.ServletOutputStreamImpl.write(ServletOutputStreamImpl.java:138) ~[undertow-servlet-2.1.3.Final.jar:2.1.3.Final]
	at java.base/sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:233) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:312) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:316) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) ~[na:na]
	at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:254) ~[na:na]
	at org.springframework.util.StreamUtils.copy(StreamUtils.java:147) ~[spring-core-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:122) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:44) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:227) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.sendInternal(ResponseBodyEmitterReturnValueHandler.java:210) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.send(ResponseBodyEmitterReturnValueHandler.java:203) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.sendInternal(ResponseBodyEmitter.java:189) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.send(ResponseBodyEmitter.java:183) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:126) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:109) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:90) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at trial.sse.SseResource.lambda$startStream$0(SseResource.java:32) ~[classes/:na]
	at reactor.core.publisher.FluxHandle$HandleSubscriber.onNext(FluxHandle.java:96) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.publisher.FluxInterval$IntervalRunnable.run(FluxInterval.java:123) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.call(PeriodicWorkerTask.java:59) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.run(PeriodicWorkerTask.java:73) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset$$$capture(FutureTask.java:305) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java) ~[na:na]
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
	at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]

2020-07-21 10:09:33.118  INFO 448 --- [  XNIO-1 task-1] trial.sse.SseResource                    : Sse request with id: 1
2020-07-21 10:09:33.803 ERROR 448 --- [    Heartbeat-1] trial.sse.SseResource                    : SSE error

java.io.IOException: UT010029: Stream is closed
	at io.undertow.servlet.spec.ServletOutputStreamImpl.write(ServletOutputStreamImpl.java:138) ~[undertow-servlet-2.1.3.Final.jar:2.1.3.Final]
	at java.base/sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:233) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:312) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:316) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) ~[na:na]
	at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:254) ~[na:na]
	at org.springframework.util.StreamUtils.copy(StreamUtils.java:147) ~[spring-core-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:122) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:44) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:227) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.sendInternal(ResponseBodyEmitterReturnValueHandler.java:210) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.send(ResponseBodyEmitterReturnValueHandler.java:203) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.sendInternal(ResponseBodyEmitter.java:189) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.send(ResponseBodyEmitter.java:183) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:126) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:109) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:90) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at trial.sse.SseResource.lambda$startStream$0(SseResource.java:32) ~[classes/:na]
	at reactor.core.publisher.FluxHandle$HandleSubscriber.onNext(FluxHandle.java:96) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.publisher.FluxInterval$IntervalRunnable.run(FluxInterval.java:123) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.call(PeriodicWorkerTask.java:59) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.run(PeriodicWorkerTask.java:73) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset$$$capture(FutureTask.java:305) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java) ~[na:na]
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
	at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]

2020-07-21 10:09:35.150  INFO 448 --- [  XNIO-1 task-2] trial.sse.SseResource                    : Sse request with id: 1
2020-07-21 10:09:36.119 ERROR 448 --- [    Heartbeat-1] trial.sse.SseResource                    : SSE error

java.io.IOException: UT010029: Stream is closed
	at io.undertow.servlet.spec.ServletOutputStreamImpl.write(ServletOutputStreamImpl.java:138) ~[undertow-servlet-2.1.3.Final.jar:2.1.3.Final]
	at java.base/sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:233) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:312) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:316) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) ~[na:na]
	at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:254) ~[na:na]
	at org.springframework.util.StreamUtils.copy(StreamUtils.java:147) ~[spring-core-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:122) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:44) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:227) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.sendInternal(ResponseBodyEmitterReturnValueHandler.java:210) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.send(ResponseBodyEmitterReturnValueHandler.java:203) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.sendInternal(ResponseBodyEmitter.java:189) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.send(ResponseBodyEmitter.java:183) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:126) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:109) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:90) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at trial.sse.SseResource.lambda$startStream$0(SseResource.java:32) ~[classes/:na]
	at reactor.core.publisher.FluxHandle$HandleSubscriber.onNext(FluxHandle.java:96) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.publisher.FluxInterval$IntervalRunnable.run(FluxInterval.java:123) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.call(PeriodicWorkerTask.java:59) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.run(PeriodicWorkerTask.java:73) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset$$$capture(FutureTask.java:305) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java) ~[na:na]
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
	at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]

2020-07-21 10:09:37.080  INFO 448 --- [  XNIO-1 task-1] trial.sse.SseResource                    : Sse request with id: 1
2020-07-21 10:09:37.151 ERROR 448 --- [    Heartbeat-1] trial.sse.SseResource                    : SSE error

java.io.IOException: UT010029: Stream is closed
	at io.undertow.servlet.spec.ServletOutputStreamImpl.write(ServletOutputStreamImpl.java:138) ~[undertow-servlet-2.1.3.Final.jar:2.1.3.Final]
	at java.base/sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:233) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:312) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:316) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) ~[na:na]
	at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:254) ~[na:na]
	at org.springframework.util.StreamUtils.copy(StreamUtils.java:147) ~[spring-core-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:122) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:44) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:227) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.sendInternal(ResponseBodyEmitterReturnValueHandler.java:210) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.send(ResponseBodyEmitterReturnValueHandler.java:203) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.sendInternal(ResponseBodyEmitter.java:189) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.send(ResponseBodyEmitter.java:183) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:126) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:109) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:90) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at trial.sse.SseResource.lambda$startStream$0(SseResource.java:32) ~[classes/:na]
	at reactor.core.publisher.FluxHandle$HandleSubscriber.onNext(FluxHandle.java:96) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.publisher.FluxInterval$IntervalRunnable.run(FluxInterval.java:123) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.call(PeriodicWorkerTask.java:59) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.run(PeriodicWorkerTask.java:73) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset$$$capture(FutureTask.java:305) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java) ~[na:na]
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
	at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]

2020-07-21 10:09:39.150  INFO 448 --- [  XNIO-1 task-2] trial.sse.SseResource                    : Sse request with id: 1
2020-07-21 10:09:40.082 ERROR 448 --- [    Heartbeat-1] trial.sse.SseResource                    : SSE error

java.io.IOException: UT010029: Stream is closed
	at io.undertow.servlet.spec.ServletOutputStreamImpl.write(ServletOutputStreamImpl.java:138) ~[undertow-servlet-2.1.3.Final.jar:2.1.3.Final]
	at java.base/sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:233) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:312) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:316) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) ~[na:na]
	at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:254) ~[na:na]
	at org.springframework.util.StreamUtils.copy(StreamUtils.java:147) ~[spring-core-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:122) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:44) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:227) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.sendInternal(ResponseBodyEmitterReturnValueHandler.java:210) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.send(ResponseBodyEmitterReturnValueHandler.java:203) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.sendInternal(ResponseBodyEmitter.java:189) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.send(ResponseBodyEmitter.java:183) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:126) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:109) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:90) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at trial.sse.SseResource.lambda$startStream$0(SseResource.java:32) ~[classes/:na]
	at reactor.core.publisher.FluxHandle$HandleSubscriber.onNext(FluxHandle.java:96) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.publisher.FluxInterval$IntervalRunnable.run(FluxInterval.java:123) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.call(PeriodicWorkerTask.java:59) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.run(PeriodicWorkerTask.java:73) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset$$$capture(FutureTask.java:305) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java) ~[na:na]
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
	at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]

2020-07-21 10:09:41.418  INFO 448 --- [  XNIO-1 task-1] trial.sse.SseResource                    : Sse request with id: 1
2020-07-21 10:09:42.151 ERROR 448 --- [    Heartbeat-1] trial.sse.SseResource                    : SSE error

java.io.IOException: UT010029: Stream is closed
	at io.undertow.servlet.spec.ServletOutputStreamImpl.write(ServletOutputStreamImpl.java:138) ~[undertow-servlet-2.1.3.Final.jar:2.1.3.Final]
	at java.base/sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:233) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:312) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:316) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) ~[na:na]
	at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:254) ~[na:na]
	at org.springframework.util.StreamUtils.copy(StreamUtils.java:147) ~[spring-core-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:122) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:44) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:227) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.sendInternal(ResponseBodyEmitterReturnValueHandler.java:210) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.send(ResponseBodyEmitterReturnValueHandler.java:203) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.sendInternal(ResponseBodyEmitter.java:189) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.send(ResponseBodyEmitter.java:183) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:126) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:109) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:90) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at trial.sse.SseResource.lambda$startStream$0(SseResource.java:32) ~[classes/:na]
	at reactor.core.publisher.FluxHandle$HandleSubscriber.onNext(FluxHandle.java:96) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.publisher.FluxInterval$IntervalRunnable.run(FluxInterval.java:123) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.call(PeriodicWorkerTask.java:59) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.run(PeriodicWorkerTask.java:73) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset$$$capture(FutureTask.java:305) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java) ~[na:na]
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
	at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]

2020-07-21 10:09:42.770  INFO 448 --- [  XNIO-1 task-2] trial.sse.SseResource                    : Sse request with id: 1
2020-07-21 10:09:43.420 ERROR 448 --- [    Heartbeat-1] trial.sse.SseResource                    : SSE error

java.io.IOException: UT010029: Stream is closed
	at io.undertow.servlet.spec.ServletOutputStreamImpl.write(ServletOutputStreamImpl.java:138) ~[undertow-servlet-2.1.3.Final.jar:2.1.3.Final]
	at java.base/sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:233) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:312) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:316) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) ~[na:na]
	at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:254) ~[na:na]
	at org.springframework.util.StreamUtils.copy(StreamUtils.java:147) ~[spring-core-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:122) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:44) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:227) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.sendInternal(ResponseBodyEmitterReturnValueHandler.java:210) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.send(ResponseBodyEmitterReturnValueHandler.java:203) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.sendInternal(ResponseBodyEmitter.java:189) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.send(ResponseBodyEmitter.java:183) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:126) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:109) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:90) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at trial.sse.SseResource.lambda$startStream$0(SseResource.java:32) ~[classes/:na]
	at reactor.core.publisher.FluxHandle$HandleSubscriber.onNext(FluxHandle.java:96) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.publisher.FluxInterval$IntervalRunnable.run(FluxInterval.java:123) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.call(PeriodicWorkerTask.java:59) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.run(PeriodicWorkerTask.java:73) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset$$$capture(FutureTask.java:305) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java) ~[na:na]
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
	at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]

2020-07-21 10:09:43.941  INFO 448 --- [  XNIO-1 task-1] trial.sse.SseResource                    : Sse request with id: 1
2020-07-21 10:09:44.773 ERROR 448 --- [    Heartbeat-1] trial.sse.SseResource                    : SSE error

java.io.IOException: UT010029: Stream is closed
	at io.undertow.servlet.spec.ServletOutputStreamImpl.write(ServletOutputStreamImpl.java:138) ~[undertow-servlet-2.1.3.Final.jar:2.1.3.Final]
	at java.base/sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:233) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:312) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:316) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) ~[na:na]
	at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:254) ~[na:na]
	at org.springframework.util.StreamUtils.copy(StreamUtils.java:147) ~[spring-core-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:122) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:44) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:227) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.sendInternal(ResponseBodyEmitterReturnValueHandler.java:210) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.send(ResponseBodyEmitterReturnValueHandler.java:203) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.sendInternal(ResponseBodyEmitter.java:189) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.send(ResponseBodyEmitter.java:183) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:126) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:109) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:90) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at trial.sse.SseResource.lambda$startStream$0(SseResource.java:32) ~[classes/:na]
	at reactor.core.publisher.FluxHandle$HandleSubscriber.onNext(FluxHandle.java:96) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.publisher.FluxInterval$IntervalRunnable.run(FluxInterval.java:123) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.call(PeriodicWorkerTask.java:59) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.run(PeriodicWorkerTask.java:73) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset$$$capture(FutureTask.java:305) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java) ~[na:na]
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
	at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]

2020-07-21 10:09:45.056  INFO 448 --- [  XNIO-1 task-2] trial.sse.SseResource                    : Sse request with id: 1
2020-07-21 10:09:45.942 ERROR 448 --- [    Heartbeat-1] trial.sse.SseResource                    : SSE error

java.io.IOException: UT010029: Stream is closed
	at io.undertow.servlet.spec.ServletOutputStreamImpl.write(ServletOutputStreamImpl.java:138) ~[undertow-servlet-2.1.3.Final.jar:2.1.3.Final]
	at java.base/sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:233) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:312) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:316) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) ~[na:na]
	at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:254) ~[na:na]
	at org.springframework.util.StreamUtils.copy(StreamUtils.java:147) ~[spring-core-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:122) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:44) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:227) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.sendInternal(ResponseBodyEmitterReturnValueHandler.java:210) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.send(ResponseBodyEmitterReturnValueHandler.java:203) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.sendInternal(ResponseBodyEmitter.java:189) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.send(ResponseBodyEmitter.java:183) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:126) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:109) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:90) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at trial.sse.SseResource.lambda$startStream$0(SseResource.java:32) ~[classes/:na]
	at reactor.core.publisher.FluxHandle$HandleSubscriber.onNext(FluxHandle.java:96) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.publisher.FluxInterval$IntervalRunnable.run(FluxInterval.java:123) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.call(PeriodicWorkerTask.java:59) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.run(PeriodicWorkerTask.java:73) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset$$$capture(FutureTask.java:305) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java) ~[na:na]
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
	at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]

2020-07-21 10:09:46.175  INFO 448 --- [  XNIO-1 task-1] trial.sse.SseResource                    : Sse request with id: 1
2020-07-21 10:09:47.057 ERROR 448 --- [    Heartbeat-1] trial.sse.SseResource                    : SSE error

java.io.IOException: UT010029: Stream is closed
	at io.undertow.servlet.spec.ServletOutputStreamImpl.write(ServletOutputStreamImpl.java:138) ~[undertow-servlet-2.1.3.Final.jar:2.1.3.Final]
	at java.base/sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:233) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:312) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:316) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) ~[na:na]
	at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:254) ~[na:na]
	at org.springframework.util.StreamUtils.copy(StreamUtils.java:147) ~[spring-core-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:122) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:44) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:227) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.sendInternal(ResponseBodyEmitterReturnValueHandler.java:210) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.send(ResponseBodyEmitterReturnValueHandler.java:203) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.sendInternal(ResponseBodyEmitter.java:189) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.send(ResponseBodyEmitter.java:183) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:126) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:109) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:90) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at trial.sse.SseResource.lambda$startStream$0(SseResource.java:32) ~[classes/:na]
	at reactor.core.publisher.FluxHandle$HandleSubscriber.onNext(FluxHandle.java:96) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.publisher.FluxInterval$IntervalRunnable.run(FluxInterval.java:123) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.call(PeriodicWorkerTask.java:59) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.run(PeriodicWorkerTask.java:73) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset$$$capture(FutureTask.java:305) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java) ~[na:na]
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
	at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]

2020-07-21 10:09:56.560  INFO 448 --- [  XNIO-1 task-2] trial.sse.SseResource                    : Sse request with id: 1
2020-07-21 10:09:57.177 ERROR 448 --- [    Heartbeat-1] trial.sse.SseResource                    : SSE error

java.io.IOException: UT010029: Stream is closed
	at io.undertow.servlet.spec.ServletOutputStreamImpl.write(ServletOutputStreamImpl.java:138) ~[undertow-servlet-2.1.3.Final.jar:2.1.3.Final]
	at java.base/sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:233) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:312) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:316) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) ~[na:na]
	at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:254) ~[na:na]
	at org.springframework.util.StreamUtils.copy(StreamUtils.java:147) ~[spring-core-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:122) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:44) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:227) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.sendInternal(ResponseBodyEmitterReturnValueHandler.java:210) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.send(ResponseBodyEmitterReturnValueHandler.java:203) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.sendInternal(ResponseBodyEmitter.java:189) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.send(ResponseBodyEmitter.java:183) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:126) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:109) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:90) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at trial.sse.SseResource.lambda$startStream$0(SseResource.java:32) ~[classes/:na]
	at reactor.core.publisher.FluxHandle$HandleSubscriber.onNext(FluxHandle.java:96) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.publisher.FluxInterval$IntervalRunnable.run(FluxInterval.java:123) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.call(PeriodicWorkerTask.java:59) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.run(PeriodicWorkerTask.java:73) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset$$$capture(FutureTask.java:305) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java) ~[na:na]
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
	at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]

2020-07-21 10:09:57.635  INFO 448 --- [  XNIO-1 task-1] trial.sse.SseResource                    : Sse request with id: 1
2020-07-21 10:09:58.537  INFO 448 --- [  XNIO-1 task-2] trial.sse.SseResource                    : Closing SSE connection: Completion
2020-07-21 10:09:58.562 ERROR 448 --- [    Heartbeat-1] trial.sse.SseResource                    : SSE error

java.io.IOException: UT010029: Stream is closed
	at io.undertow.servlet.spec.ServletOutputStreamImpl.write(ServletOutputStreamImpl.java:138) ~[undertow-servlet-2.1.3.Final.jar:2.1.3.Final]
	at java.base/sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:233) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:312) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:316) ~[na:na]
	at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) ~[na:na]
	at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:254) ~[na:na]
	at org.springframework.util.StreamUtils.copy(StreamUtils.java:147) ~[spring-core-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:122) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.StringHttpMessageConverter.writeInternal(StringHttpMessageConverter.java:44) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:227) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.sendInternal(ResponseBodyEmitterReturnValueHandler.java:210) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitterReturnValueHandler$HttpMessageConvertingHandler.send(ResponseBodyEmitterReturnValueHandler.java:203) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.sendInternal(ResponseBodyEmitter.java:189) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ResponseBodyEmitter.send(ResponseBodyEmitter.java:183) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:126) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:109) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.SseEmitter.send(SseEmitter.java:90) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at trial.sse.SseResource.lambda$startStream$0(SseResource.java:32) ~[classes/:na]
	at reactor.core.publisher.FluxHandle$HandleSubscriber.onNext(FluxHandle.java:96) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.publisher.FluxInterval$IntervalRunnable.run(FluxInterval.java:123) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.call(PeriodicWorkerTask.java:59) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at reactor.core.scheduler.PeriodicWorkerTask.run(PeriodicWorkerTask.java:73) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset$$$capture(FutureTask.java:305) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java) ~[na:na]
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
	at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]