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Type: Bug
Resolution: Unresolved
Priority: Major
Fix Version/s: None
Affects Version/s: 2.2.1.Final, 2.2.2.Final, 2.2.3.Final
Component/s: Servlet
Labels:
None

Steps to Reproduce:
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cd <undertow_root>

mvn -Dmaven.javadoc.skip=true -Dcheckstyle.skip=true -Dmdep.analyze.skip=true -Dpmd.skip clean install -DskipTests

cd servlet

mvn test --show-version -Dmaven.javadoc.skip=true -DskipUnitTests -Pproxy -Denforcer.skip -Dtest=ServletInputStreamRequestBufferingTestCase.java -DfailIfNoTests=false -Dtest.level=DEBUG
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cd <undertow_root> mvn -Dmaven.javadoc.skip= true -Dcheckstyle.skip= true -Dmdep.analyze.skip= true -Dpmd.skip clean install -DskipTests cd servlet mvn test --show-version -Dmaven.javadoc.skip= true -DskipUnitTests -Pproxy -Denforcer.skip -Dtest=ServletInputStreamRequestBufferingTestCase.java -DfailIfNoTests= false -Dtest.level=DEBUG
Release Note Text:
Undefined

This test:

io.undertow.servlet.test.streams.ServletInputStreamRequestBufferingTestCase.testAsyncServletInputStreamInParallel[proxy][http2-clear-upgrade]

started to fail quite consistently on my machine with following failure:

[ERROR] Errors: 
[ERROR] io.undertow.servlet.test.streams.ServletInputStreamRequestBufferingTestCase.testAsyncServletInputStreamInParallelOffIoThread[proxy][http2-clear-upgrade](io.undertow.servlet.test.streams.ServletInputStreamRequestBufferingTestCase)
[ERROR]   Run 1: ServletInputStreamRequestBufferingTestCase>AbstractServletInputStreamTestCase.testAsyncServletInputStreamInParallelOffIoThread:130->AbstractServletInputStreamTestCase.runTestParallel:293 » Execution
[ERROR]   Run 2: ServletInputStreamRequestBufferingTestCase.testAsyncServletInputStreamInParallelOffIoThread[proxy][http2-clear-upgrade] » Runtime
[ERROR]   Run 3: ServletInputStreamRequestBufferingTestCase.testAsyncServletInputStreamInParallelOffIoThread[proxy][http2-clear-upgrade] » Runtime
[ERROR]   Run 4: ServletInputStreamRequestBufferingTestCase.testAsyncServletInputStreamInParallelOffIoThread[proxy][http2-clear-upgrade] » Runtime
[ERROR]   Run 5: ServletInputStreamRequestBufferingTestCase.testAsyncServletInputStreamInParallelOffIoThread[proxy][http2-clear-upgrade] » Runtime
[ERROR]   Run 6: ServletInputStreamRequestBufferingTestCase.testAsyncServletInputStreamInParallelOffIoThread[proxy][http2-clear-upgrade] » Runtime
[ERROR]   Run 7: ServletInputStreamRequestBufferingTestCase.testAsyncServletInputStreamInParallelOffIoThread[proxy][http2-clear-upgrade] » Runtime
[ERROR]   Run 8: ServletInputStreamRequestBufferingTestCase.testAsyncServletInputStreamInParallelOffIoThread[proxy][http2-clear-upgrade] » Runtime
[ERROR]   Run 9: ServletInputStreamRequestBufferingTestCase.testAsyncServletInputStreamInParallelOffIoThread[proxy][http2-clear-upgrade] » Runtime
[ERROR]   Run 10: ServletInputStreamRequestBufferingTestCase.testAsyncServletInputStreamInParallelOffIoThread[proxy][http2-clear-upgrade] » Runtime
[ERROR]   Run 11: ServletInputStreamRequestBufferingTestCase.testAsyncServletInputStreamInParallelOffIoThread[proxy][http2-clear-upgrade] » Runtime
[ERROR]   Run 12: ServletInputStreamRequestBufferingTestCase.testAsyncServletInputStreamInParallelOffIoThread[proxy][http2-clear-upgrade] » Runtime

I can see e.g. these in the surefire output:

[ERROR] testAsyncServletInputStreamInParallelOffIoThread[proxy][http2-clear-upgrade](io.undertow.servlet.test.streams.ServletInputStreamRequestBufferingTestCase)  Time elapsed: 21.668 s  <<< ERROR!
java.lang.RuntimeException: Buffer Leak io.undertow.servlet.test.streams.ServletInputStreamRequestBufferingTestCase.testAsyncServletInputStreamInParallelOffIoThread[proxy][http2-clear-upgrade]
	at io.undertow.testutils.DefaultServer$2.testFinished(DefaultServer.java:294)
	at org.junit.runner.notification.SynchronizedRunListener.testFinished(SynchronizedRunListener.java:87)
	at org.junit.runner.notification.RunNotifier$9.notifyListener(RunNotifier.java:225)
	at org.junit.runner.notification.RunNotifier$SafeNotifier.run(RunNotifier.java:72)
	at org.junit.runner.notification.RunNotifier.fireTestFinished(RunNotifier.java:222)
	at org.junit.internal.runners.model.EachTestNotifier.fireTestFinished(EachTestNotifier.java:38)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:372)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
	at io.undertow.testutils.DefaultServer.runChild(DefaultServer.java:532)
	at io.undertow.testutils.DefaultServer.runChild(DefaultServer.java:105)
	at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
	at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
	at io.undertow.testutils.DefaultServer.run(DefaultServer.java:302)
	at org.junit.runners.Suite.runChild(Suite.java:128)
	at org.junit.runners.Suite.runChild(Suite.java:27)
	at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
	at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
	at org.apache.maven.surefire.junitcore.JUnitCore.run(JUnitCore.java:55)
	at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.createRequestAndRun(JUnitCoreWrapper.java:137)
	at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.executeEager(JUnitCoreWrapper.java:107)
	at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.execute(JUnitCoreWrapper.java:83)
	at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.execute(JUnitCoreWrapper.java:75)
	at org.apache.maven.surefire.junitcore.JUnitCoreProvider.invoke(JUnitCoreProvider.java:158)
	at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:383)
	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:344)
	at org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:125)
	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:417)
Caused by: java.lang.RuntimeException: java.nio.DirectByteBuffer[pos=0 lim=8192 cap=8192] NO: 71050 [NO_CONTEXT]
	at io.undertow.testutils.DebuggingSlicePool$DebuggingBuffer.<init>(DebuggingSlicePool.java:84)
	at io.undertow.testutils.DebuggingSlicePool.allocate(DebuggingSlicePool.java:45)
	at io.undertow.conduits.ChunkedStreamSourceConduit$1.allocate(ChunkedStreamSourceConduit.java:73)
	at io.undertow.conduits.ChunkedStreamSourceConduit.read(ChunkedStreamSourceConduit.java:183)
	at org.xnio.conduits.ConduitStreamSourceChannel.read(ConduitStreamSourceChannel.java:127)
	at io.undertow.util.ConnectionUtils.doDrain(ConnectionUtils.java:96)
	at io.undertow.util.ConnectionUtils.cleanClose(ConnectionUtils.java:74)
	at io.undertow.client.http.HttpClientConnection.close(HttpClientConnection.java:472)
	at org.xnio.IoUtils.safeClose(IoUtils.java:152)
	at io.undertow.server.handlers.proxy.ProxyHandler$IoExceptionHandler.handleException(ProxyHandler.java:809)
	at org.xnio.ChannelListeners.invokeChannelExceptionHandler(ChannelListeners.java:126)
	at io.undertow.util.Transfer.initiateTransfer(Transfer.java:82)
	at io.undertow.server.handlers.proxy.ProxyHandler$ResponseCallback.completed(ProxyHandler.java:741)
	at io.undertow.server.handlers.proxy.ProxyHandler$ResponseCallback.completed(ProxyHandler.java:692)
	at io.undertow.client.http.HttpClientExchange.setResponse(HttpClientExchange.java:125)
	at io.undertow.client.http.HttpClientConnection$ClientReadListener.handleEvent(HttpClientConnection.java:651)
	at io.undertow.client.http.HttpClientConnection$ClientReadListener.handleEvent(HttpClientConnection.java:516)
	at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
	at org.xnio.conduits.ReadReadyHandler$ChannelListenerHandler.readReady(ReadReadyHandler.java:66)
	at org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit.java:89)
	at org.xnio.nio.WorkerThread.run(WorkerThread.java:591)

I'm adding complete surefire reports ran with `-Dtest.level=DEBUG`.

Basic info about my machine:

$ uname -a
Linux localhost.localdomain 5.10.11-200.fc33.x86_64 #1 SMP Wed Jan 27 20:21:22 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
$ java --version
openjdk 11.0.10 2021-01-19
OpenJDK Runtime Environment 18.9 (build 11.0.10+9)
OpenJDK 64-Bit Server VM 18.9 (build 11.0.10+9, mixed mode, sharing)
$ mvn --show-version
Apache Maven 3.6.3 (cecedd343002696d0abb50b32b541b8a6ba2883f)
Maven home: /home/jstourac/mvns/latest
Java version: 11.0.10, vendor: Red Hat, Inc., runtime: /usr/lib/jvm/java-11-openjdk-11.0.10.0.9-0.fc33.x86_64
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "5.10.11-200.fc33.x86_64", arch: "amd64", family: "unix"

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io.undertow.servlet.test.streams.ServletInputStreamRequestBufferingTestCase.txt
284 kB
2021/02/07 4:54 AM
io.undertow.servlet.test.streams.ServletInputStreamRequestBufferingTestCase-output.txt
1.12 MB
2021/02/07 4:54 AM
null-output.txt
3 kB
2021/02/07 4:54 AM
TEST-io.undertow.servlet.test.streams.ServletInputStreamRequestBufferingTestCase.xml
834 kB
2021/02/07 4:54 AM

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UNDERTOW-1446 Tests intermittently fail with Buffer Leak exception

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