WARN message jaegertracing: FlushCommand execution failed!

10:25:03,833 INFO  [org.dcm4chee.arc.conf.rs.QueryAttributeFilter] (default task-6) Process GET /dcm4chee-arc/attribute-filter/Patient from null@192.168.2.131
10:25:03,844 WARN  [io.jaegertracing.internal.reporters.RemoteReporter] (jaeger.RemoteReporter-QueueProcessor) FlushCommand execution failed! Repeated errors of this command will not be logged.: io.jaegertracing.internal.exceptions.SenderException: Failed to flush spans.
	at io.jaegertracing.jaeger@1.5.0//io.jaegertracing.thrift.internal.senders.ThriftSender.flush(ThriftSender.java:115)
	at io.jaegertracing.jaeger@1.5.0//io.jaegertracing.internal.reporters.RemoteReporter$FlushCommand.execute(RemoteReporter.java:160)
	at io.jaegertracing.jaeger@1.5.0//io.jaegertracing.internal.reporters.RemoteReporter$QueueProcessor.run(RemoteReporter.java:182)
	at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: io.jaegertracing.internal.exceptions.SenderException: Could not send 1 spans
	at io.jaegertracing.jaeger@1.5.0//io.jaegertracing.thrift.internal.senders.UdpSender.send(UdpSender.java:85)
	at io.jaegertracing.jaeger@1.5.0//io.jaegertracing.thrift.internal.senders.ThriftSender.flush(ThriftSender.java:113)
	... 3 more
Caused by: org.apache.thrift.transport.TTransportException: Cannot flush closed transport
	at io.jaegertracing.jaeger@1.5.0//io.jaegertracing.thrift.internal.reporters.protocols.ThriftUdpTransport.flush(ThriftUdpTransport.java:148)
	at org.apache.thrift@0.13.0//org.apache.thrift.TServiceClient.sendBase(TServiceClient.java:73)
	at org.apache.thrift@0.13.0//org.apache.thrift.TServiceClient.sendBaseOneway(TServiceClient.java:66)
	at io.jaegertracing.jaeger@1.5.0//io.jaegertracing.agent.thrift.Agent$Client.send_emitBatch(Agent.java:70)
	at io.jaegertracing.jaeger@1.5.0//io.jaegertracing.agent.thrift.Agent$Client.emitBatch(Agent.java:63)
	at io.jaegertracing.jaeger@1.5.0//io.jaegertracing.thrift.internal.senders.UdpSender.send(UdpSender.java:83)
	... 4 more
Caused by: java.net.PortUnreachableException: ICMP Port Unreachable
	at java.base/java.net.PlainDatagramSocketImpl.send(Native Method)
	at java.base/java.net.DatagramSocket.send(DatagramSocket.java:695)
	at io.jaegertracing.jaeger@1.5.0//io.jaegertracing.thrift.internal.reporters.protocols.ThriftUdpTransport.flush(ThriftUdpTransport.java:146)
	... 9 more

10:25:03,914 INFO  [org.dcm4chee.arc.conf.rs.QueryAETs] (default task-3) Process GET /dcm4chee-arc/aets from null@192.168.2.131
10:25:03,915 INFO  [org.dcm4chee.arc.storage.rs.StorageRS] (default task-6) Process GET /dcm4chee-arc/storage?offset=0 from null@192.168.2.131
10:25:03,926 INFO  [org.dcm4chee.arc.conf.rs.ConfigurationRS] (default task-6) Process GET /dcm4chee-arc/aes from null@192.168.2.131
10:25:03,934 INFO  [org.dcm4chee.arc.conf.rs.ConfigurationRS] (default task-3) Process GET /dcm4chee-arc/aes from null@192.168.2.131
10:25:03,947 INFO  [org.dcm4chee.arc.conf.rs.ConfigurationRS] (default task-3) Process GET /dcm4chee-arc/webapps/?dcmWebServiceClass=MOVE from null@192.168.2.131
10:25:03,966 INFO  [org.dcm4chee.arc.conf.rs.ConfigurationRS] (default task-3) Process GET /dcm4chee-arc/webapps/?dcmWebServiceClass=QIDO_RS from null@192.168.2.131
10:25:03,988 INFO  [org.dcm4chee.arc.conf.rs.QueryExporters] (default task-3) Process GET /dcm4chee-arc/export from null@192.168.2.131
10:25:03,993 INFO  [org.dcm4chee.arc.conf.rs.QueryRejectionNotes] (default task-6) Process GET /dcm4chee-arc/reject/ from null@192.168.2.131
10:25:03,995 INFO  [org.dcm4chee.arc.qmgt.rs.QueryQueues] (default task-3) Process GET /dcm4chee-arc/queue from null@192.168.2.131
10:25:04,843 INFO  [io.jaegertracing.internal.reporters.RemoteReporter] (jaeger.RemoteReporter-QueueProcessor) FlushCommand is working again!
10:25:04,938 WARN  [io.jaegertracing.internal.reporters.RemoteReporter] (jaeger.RemoteReporter-QueueProcessor) FlushCommand execution failed! Repeated errors of this command will not be logged.: io.jaegertracing.internal.exceptions.SenderException: Failed to flush spans.
	at io.jaegertracing.jaeger@1.5.0//io.jaegertracing.thrift.internal.senders.ThriftSender.flush(ThriftSender.java:115)
	at io.jaegertracing.jaeger@1.5.0//io.jaegertracing.internal.reporters.RemoteReporter$FlushCommand.execute(RemoteReporter.java:160)
	at io.jaegertracing.jaeger@1.5.0//io.jaegertracing.internal.reporters.RemoteReporter$QueueProcessor.run(RemoteReporter.java:182)
	at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: io.jaegertracing.internal.exceptions.SenderException: Could not send 6 spans
	at io.jaegertracing.jaeger@1.5.0//io.jaegertracing.thrift.internal.senders.UdpSender.send(UdpSender.java:85)
	at io.jaegertracing.jaeger@1.5.0//io.jaegertracing.thrift.internal.senders.ThriftSender.flush(ThriftSender.java:113)
	... 3 more
Caused by: org.apache.thrift.transport.TTransportException: Cannot flush closed transport
	at io.jaegertracing.jaeger@1.5.0//io.jaegertracing.thrift.internal.reporters.protocols.ThriftUdpTransport.flush(ThriftUdpTransport.java:148)
	at org.apache.thrift@0.13.0//org.apache.thrift.TServiceClient.sendBase(TServiceClient.java:73)
	at org.apache.thrift@0.13.0//org.apache.thrift.TServiceClient.sendBaseOneway(TServiceClient.java:66)
	at io.jaegertracing.jaeger@1.5.0//io.jaegertracing.agent.thrift.Agent$Client.send_emitBatch(Agent.java:70)
	at io.jaegertracing.jaeger@1.5.0//io.jaegertracing.agent.thrift.Agent$Client.emitBatch(Agent.java:63)
	at io.jaegertracing.jaeger@1.5.0//io.jaegertracing.thrift.internal.senders.UdpSender.send(UdpSender.java:83)
	... 4 more
Caused by: java.net.PortUnreachableException: ICMP Port Unreachable
	at java.base/java.net.PlainDatagramSocketImpl.send(Native Method)
	at java.base/java.net.DatagramSocket.send(DatagramSocket.java:695)
	at io.jaegertracing.jaeger@1.5.0//io.jaegertracing.thrift.internal.reporters.protocols.ThriftUdpTransport.flush(ThriftUdpTransport.java:146)
	... 9 more

10:25:05,937 INFO  [io.jaegertracing.internal.reporters.RemoteReporter] (jaeger.RemoteReporter-QueueProcessor) FlushCommand is working again!
...