damccorm opened a new issue, #21462:
URL: https://github.com/apache/beam/issues/21462

   ```
   
   org.apache.beam.sdk.io.mqtt.MqttIOTest.testReadObject
   
   Failing for the past 1 build (Since #4376
   )
   Took 8 sec.
   Error Message
   java.io.IOException: Failed to bind to server socket: mqtt://localhost:38845
   due to: java.net.BindException: Address already in use (Bind failed)
   Stacktrace
   java.io.IOException:
   Failed to bind to server socket: mqtt://localhost:38845 due to: 
java.net.BindException: Address already
   in use (Bind failed)
        at 
org.apache.activemq.util.IOExceptionSupport.create(IOExceptionSupport.java:34)
        at
   
org.apache.activemq.transport.tcp.TcpTransportServer.bind(TcpTransportServer.java:143)
        at 
org.apache.activemq.transport.tcp.TcpTransportFactory.doBind(TcpTransportFactory.java:62)
        at
   
org.apache.activemq.transport.TransportFactorySupport.bind(TransportFactorySupport.java:40)
        at 
org.apache.activemq.broker.BrokerService.createTransportConnector(BrokerService.java:2478)
        at
   org.apache.activemq.broker.BrokerService.addConnector(BrokerService.java:338)
        at 
org.apache.activemq.broker.BrokerService.addConnector(BrokerService.java:328)
        at
   org.apache.beam.sdk.io.mqtt.MqttIOTest.startBroker(MqttIOTest.java:77)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native
   Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at
   java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
        at
   
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
        at
   
org.junit.internal.runners.statements.RunBefores.invokeMethod(RunBefores.java:33)
        at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
        at
   org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
        at 
org.apache.beam.sdk.testing.TestPipeline$1.evaluate(TestPipeline.java:323)
        at
   org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
        at 
org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
        at
   org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
        at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
        at
   
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
        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.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.runTestClass(JUnitTestClassExecutor.java:110)
        at
   
org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:58)
        at
   
org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:38)
        at
   
org.gradle.api.internal.tasks.testing.junit.AbstractJUnitTestClassProcessor.processTestClass(AbstractJUnitTestClassProcessor.java:62)
        at
   
org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:51)
        at
   sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at
   
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at
   
org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
        at 
org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
        at
   
org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33)
        at
   
org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
        at
   com.sun.proxy.$Proxy2.processTestClass(Unknown Source)
        at 
org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:119)
        at
   sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at
   
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at
   
org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
        at 
org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
        at
   
org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:182)
        at
   
org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:164)
        at
   
org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:414)
        at 
org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
        at
   
org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at
   
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at 
org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56)
        at
   java.lang.Thread.run(Thread.java:748)
   Caused by: java.net.BindException: Address already in use (Bind
   failed)
        at java.net.PlainSocketImpl.socketBind(Native Method)
        at 
java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:387)
        at
   java.net.ServerSocket.bind(ServerSocket.java:390)
        at java.net.ServerSocket.<init>(ServerSocket.java:252)
        at
   
javax.net.DefaultServerSocketFactory.createServerSocket(ServerSocketFactory.java:231)
        at 
org.apache.activemq.transport.tcp.TcpTransportServer.bind(TcpTransportServer.java:140)
        ...
   59 more
   Standard Error
   Dec 13, 2021 10:17:02 PM org.apache.beam.sdk.io.mqtt.MqttIOTest startBroker
   INFO:
   Starting ActiveMQ brokerService on 38845
   Dec 13, 2021 10:17:02 PM org.apache.activemq.broker.BrokerService
   stop
   INFO: Apache ActiveMQ 5.14.5 (localhost, null) is shutting down
   Dec 13, 2021 10:17:02 PM org.apache.activemq.broker.BrokerService
   stop
   INFO: Apache ActiveMQ 5.14.5 (localhost, null) is shutdown
   Dec 13, 2021 10:17:02 PM org.apache.beam.sdk.io.mqtt.MqttIOTest
   startBroker
   INFO: Starting ActiveMQ brokerService on 36981
   Dec 13, 2021 10:17:03 PM org.apache.activemq.broker.BrokerService
   doStartPersistenceAdapter
   INFO: Using Persistence Adapter: MemoryPersistenceAdapter
   Dec 13, 2021 10:17:03
   PM org.apache.activemq.broker.jmx.ManagementContext$1 run
   INFO: JMX consoles can connect to 
service:jmx:rmi:///jndi/rmi://localhost:1099/jmxrmi
   Dec
   13, 2021 10:17:04 PM org.apache.activemq.broker.BrokerService doStartBroker
   INFO: Apache ActiveMQ 5.14.5
   (localhost, ID:apache-ci-beam-jenkins-3-34821-1639433823589-0:1) is starting
   Dec 13, 2021 10:17:04
   PM org.apache.activemq.transport.TransportServerThreadSupport doStart
   INFO: Listening for connections
   at: mqtt://localhost:36981
   Dec 13, 2021 10:17:04 PM org.apache.activemq.broker.TransportConnector start
   INFO:
   Connector mqtt://localhost:36981 started
   Dec 13, 2021 10:17:04 PM org.apache.activemq.broker.BrokerService
   doStartBroker
   INFO: Apache ActiveMQ 5.14.5 (localhost, 
ID:apache-ci-beam-jenkins-3-34821-1639433823589-0:1)
   started
   Dec 13, 2021 10:17:04 PM org.apache.activemq.broker.BrokerService 
doStartBroker
   INFO: For
   help or more information please see: http://activemq.apache.org
   Dec 13, 2021 10:17:18 PM org.apache.activemq.broker.BrokerService
   stop
   INFO: Apache ActiveMQ 5.14.5 (localhost, 
ID:apache-ci-beam-jenkins-3-34821-1639433823589-0:1)
   is shutting down
   Dec 13, 2021 10:17:18 PM org.apache.activemq.broker.TransportConnector stop
   INFO:
   Connector mqtt://localhost:36981 stopped
   Dec 13, 2021 10:17:18 PM org.apache.activemq.broker.BrokerService
   stop
   INFO: Apache ActiveMQ 5.14.5 (localhost, 
ID:apache-ci-beam-jenkins-3-34821-1639433823589-0:1)
   uptime 15.281 seconds
   Dec 13, 2021 10:17:18 PM org.apache.activemq.broker.BrokerService stop
   INFO:
   Apache ActiveMQ 5.14.5 (localhost, 
ID:apache-ci-beam-jenkins-3-34821-1639433823589-0:1) is shutdown
   Dec
   13, 2021 10:17:18 PM org.apache.beam.sdk.io.mqtt.MqttIOTest startBroker
   INFO: Starting ActiveMQ brokerService
   on 45689
   Dec 13, 2021 10:17:18 PM org.apache.activemq.broker.BrokerService 
doStartPersistenceAdapter
   INFO:
   Using Persistence Adapter: MemoryPersistenceAdapter
   Dec 13, 2021 10:17:18 PM org.apache.activemq.broker.BrokerService
   doStartBroker
   INFO: Apache ActiveMQ 5.14.5 (localhost, 
ID:apache-ci-beam-jenkins-3-34821-1639433823589-0:2)
   is starting
   Dec 13, 2021 10:17:18 PM org.apache.activemq.broker.jmx.ManagementContext$1 
run
   INFO:
   JMX consoles can connect to 
service:jmx:rmi:///jndi/rmi://localhost:1099/jmxrmi
   Dec 13, 2021 10:17:18
   PM org.apache.activemq.transport.TransportServerThreadSupport doStart
   INFO: Listening for connections
   at: mqtt://localhost:45689
   Dec 13, 2021 10:17:18 PM org.apache.activemq.broker.TransportConnector start
   INFO:
   Connector mqtt://localhost:45689 started
   Dec 13, 2021 10:17:18 PM org.apache.activemq.broker.BrokerService
   doStartBroker
   INFO: Apache ActiveMQ 5.14.5 (localhost, 
ID:apache-ci-beam-jenkins-3-34821-1639433823589-0:2)
   started
   Dec 13, 2021 10:17:18 PM org.apache.activemq.broker.BrokerService 
doStartBroker
   INFO: For
   help or more information please see: http://activemq.apache.org
   Dec 13, 2021 10:17:18 PM org.apache.beam.sdk.coders.SerializableCoder
   checkEqualsMethodDefined
   WARNING: Can't verify serialized elements of type Shard have well defined
   equals method. This may produce incorrect results on some PipelineRunner
   Dec 13, 2021 10:17:19 PM 
org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector
   verifyUnmodifiedThrowingCheckedExceptions
   WARNING: Coder of type class org.apache.beam.sdk.coders.SerializableCoder
   has a #structuralValue method which does not return true when the encoding 
of the elements is equal.
   Element 
Shard{source=org.apache.beam.sdk.io.mqtt.MqttIO$UnboundedMqttSource@2c541ea7, 
maxNumRecords=9223372036854775807,
   maxReadTime=PT2S}
   Dec 13, 2021 10:17:19 PM 
org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector
   verifyUnmodifiedThrowingCheckedExceptions
   WARNING: Coder of type class org.apache.beam.sdk.coders.SerializableCoder
   has a #structuralValue method which does not return true when the encoding 
of the elements is equal.
   Element 
Shard{source=org.apache.beam.sdk.io.mqtt.MqttIO$UnboundedMqttSource@52c00c96, 
maxNumRecords=9223372036854775807,
   maxReadTime=PT2S}
   Dec 13, 2021 10:17:19 PM 
org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector
   verifyUnmodifiedThrowingCheckedExceptions
   WARNING: Coder of type class org.apache.beam.sdk.coders.SerializableCoder
   has a #structuralValue method which does not return true when the encoding 
of the elements is equal.
   Element 
Shard{source=org.apache.beam.sdk.io.mqtt.MqttIO$UnboundedMqttSource@2730c42b, 
maxNumRecords=9223372036854775807,
   maxReadTime=PT2S}
   Dec 13, 2021 10:17:19 PM 
org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector
   verifyUnmodifiedThrowingCheckedExceptions
   WARNING: Coder of type class org.apache.beam.sdk.coders.SerializableCoder
   has a #structuralValue method which does not return true when the encoding 
of the elements is equal.
   Element 
Shard{source=org.apache.beam.sdk.io.mqtt.MqttIO$UnboundedMqttSource@52c00c96, 
maxNumRecords=9223372036854775807,
   maxReadTime=PT2S}
   Dec 13, 2021 10:17:20 PM 
org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector
   verifyUnmodifiedThrowingCheckedExceptions
   WARNING: Coder of type class org.apache.beam.sdk.coders.SerializableCoder
   has a #structuralValue method which does not return true when the encoding 
of the elements is equal.
   Element 
Shard{source=org.apache.beam.sdk.io.mqtt.MqttIO$UnboundedMqttSource@7a8ba45e, 
maxNumRecords=9223372036854775807,
   maxReadTime=PT2S}
   Dec 13, 2021 10:17:20 PM 
org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector
   verifyUnmodifiedThrowingCheckedExceptions
   WARNING: Coder of type class org.apache.beam.sdk.coders.KvCoder
   has a #structuralValue method which does not return true when the encoding 
of the elements is equal.
   Element KV{171548182, 
Shard{source=org.apache.beam.sdk.io.mqtt.MqttIO$UnboundedMqttSource@7a8ba45e,
   maxNumRecords=9223372036854775807, maxReadTime=PT2S}}
   Dec 13, 2021 10:17:20 PM 
org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector
   verifyUnmodifiedThrowingCheckedExceptions
   WARNING: Coder of type class org.apache.beam.sdk.coders.SerializableCoder
   has a #structuralValue method which does not return true when the encoding 
of the elements is equal.
   Element 
Shard{source=org.apache.beam.sdk.io.mqtt.MqttIO$UnboundedMqttSource@7a8ba45e, 
maxNumRecords=9223372036854775807,
   maxReadTime=PT2S}
   Dec 13, 2021 10:17:20 PM 
org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector
   verifyUnmodifiedThrowingCheckedExceptions
   WARNING: Coder of type class org.apache.beam.sdk.coders.KvCoder
   has a #structuralValue method which does not return true when the encoding 
of the elements is equal.
   Element KV{171548182, 
Shard{source=org.apache.beam.sdk.io.mqtt.MqttIO$UnboundedMqttSource@7c7843b3,
   maxNumRecords=9223372036854775807, maxReadTime=PT2S}}
   Dec 13, 2021 10:17:20 PM 
org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector
   verifyUnmodifiedThrowingCheckedExceptions
   WARNING: Coder of type class org.apache.beam.sdk.coders.KvCoder
   has a #structuralValue method which does not return true when the encoding 
of the elements is equal.
   Element KV{171548182, 
TimestampedValue(Shard{source=org.apache.beam.sdk.io.mqtt.MqttIO$UnboundedMqttSource@7c7843b3,
   maxNumRecords=9223372036854775807, maxReadTime=PT2S}, 
-290308-12-21T19:59:05.225Z)}
   Dec 13, 2021 10:17:20
   PM org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector 
verifyUnmodifiedThrowingCheckedExceptions
   WARNING:
   Coder of type class org.apache.beam.sdk.coders.KvCoder has a 
#structuralValue method which does not
   return true when the encoding of the elements is equal. Element 
KV{171548182, 
Shard{source=org.apache.beam.sdk.io.mqtt.MqttIO$UnboundedMqttSource@7c7843b3,
   maxNumRecords=9223372036854775807, maxReadTime=PT2S}}
   Dec 13, 2021 10:17:21 PM 
org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector
   verifyUnmodifiedThrowingCheckedExceptions
   WARNING: Coder of type class org.apache.beam.sdk.coders.KvCoder
   has a #structuralValue method which does not return true when the encoding 
of the elements is equal.
   Element KV{171548182, 
[TimestampedValue(Shard{source=org.apache.beam.sdk.io.mqtt.MqttIO$UnboundedMqttSource@4f0ed6fe,
   maxNumRecords=9223372036854775807, maxReadTime=PT2S}, 
-290308-12-21T19:59:05.225Z)]}
   Dec 13, 2021 10:17:21
   PM org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector 
verifyUnmodifiedThrowingCheckedExceptions
   WARNING:
   Coder of type class org.apache.beam.sdk.coders.KvCoder has a 
#structuralValue method which does not
   return true when the encoding of the elements is equal. Element 
KV{171548182, 
TimestampedValue(Shard{source=org.apache.beam.sdk.io.mqtt.MqttIO$UnboundedMqttSource@4f0ed6fe,
   maxNumRecords=9223372036854775807, maxReadTime=PT2S}, 
-290308-12-21T19:59:05.225Z)}
   Dec 13, 2021 10:17:21
   PM org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector 
verifyUnmodifiedThrowingCheckedExceptions
   WARNING:
   Coder of type class org.apache.beam.sdk.coders.KvCoder has a 
#structuralValue method which does not
   return true when the encoding of the elements is equal. Element 
KV{171548182, 
[TimestampedValue(Shard{source=org.apache.beam.sdk.io.mqtt.MqttIO$UnboundedMqttSource@4f0ed6fe,
   maxNumRecords=9223372036854775807, maxReadTime=PT2S}, 
-290308-12-21T19:59:05.225Z)]}
   Dec 13, 2021 10:17:21
   PM org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector 
verifyUnmodifiedThrowingCheckedExceptions
   WARNING:
   Coder of type class org.apache.beam.sdk.coders.KvCoder has a 
#structuralValue method which does not
   return true when the encoding of the elements is equal. Element 
KV{171548182, 
TimestampedValue(Shard{source=org.apache.beam.sdk.io.mqtt.MqttIO$UnboundedMqttSource@1d6ae5ef,
   maxNumRecords=9223372036854775807, maxReadTime=PT2S}, 
-290308-12-21T19:59:05.225Z)}
   Dec 13, 2021 10:17:21
   PM org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector 
verifyUnmodifiedThrowingCheckedExceptions
   WARNING:
   Coder of type class org.apache.beam.sdk.coders.KvCoder has a 
#structuralValue method which does not
   return true when the encoding of the elements is equal. Element 
KV{171548182, 
TimestampedValue(Shard{source=org.apache.beam.sdk.io.mqtt.MqttIO$UnboundedMqttSource@1d6ae5ef,
   maxNumRecords=9223372036854775807, maxReadTime=PT2S}, 
-290308-12-21T19:59:05.225Z)}
   Dec 13, 2021 10:17:21
   PM org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector 
verifyUnmodifiedThrowingCheckedExceptions
   WARNING:
   Coder of type class org.apache.beam.sdk.coders.KvCoder has a 
#structuralValue method which does not
   return true when the encoding of the elements is equal. Element 
KV{171548182, 
TimestampedValue(Shard{source=org.apache.beam.sdk.io.mqtt.MqttIO$UnboundedMqttSource@1d6ae5ef,
   maxNumRecords=9223372036854775807, maxReadTime=PT2S}, 
-290308-12-21T19:59:05.225Z)}
   Dec 13, 2021 10:17:22
   PM org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector 
verifyUnmodifiedThrowingCheckedExceptions
   WARNING:
   Coder of type class org.apache.beam.sdk.coders.KvCoder has a 
#structuralValue method which does not
   return true when the encoding of the elements is equal. Element 
KV{171548182, 
TimestampedValue(Shard{source=org.apache.beam.sdk.io.mqtt.MqttIO$UnboundedMqttSource@2cfdbf6a,
   maxNumRecords=9223372036854775807, maxReadTime=PT2S}, 
-290308-12-21T19:59:05.225Z)}
   Dec 13, 2021 10:17:22
   PM org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector 
verifyUnmodifiedThrowingCheckedExceptions
   WARNING:
   Coder of type class org.apache.beam.sdk.coders.KvCoder has a 
#structuralValue method which does not
   return true when the encoding of the elements is equal. Element 
KV{171548182, 
Shard{source=org.apache.beam.sdk.io.mqtt.MqttIO$UnboundedMqttSource@2cfdbf6a,
   maxNumRecords=9223372036854775807, maxReadTime=PT2S}}
   Dec 13, 2021 10:17:22 PM 
org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector
   verifyUnmodifiedThrowingCheckedExceptions
   WARNING: Coder of type class org.apache.beam.sdk.coders.KvCoder
   has a #structuralValue method which does not return true when the encoding 
of the elements is equal.
   Element KV{171548182, 
TimestampedValue(Shard{source=org.apache.beam.sdk.io.mqtt.MqttIO$UnboundedMqttSource@2cfdbf6a,
   maxNumRecords=9223372036854775807, maxReadTime=PT2S}, 
-290308-12-21T19:59:05.225Z)}
   Dec 13, 2021 10:17:22
   PM org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector 
verifyUnmodifiedThrowingCheckedExceptions
   WARNING:
   Coder of type class org.apache.beam.sdk.coders.KvCoder has a 
#structuralValue method which does not
   return true when the encoding of the elements is equal. Element 
KV{171548182, 
Shard{source=org.apache.beam.sdk.io.mqtt.MqttIO$UnboundedMqttSource@4776c1e9,
   maxNumRecords=9223372036854775807, maxReadTime=PT2S}}
   Dec 13, 2021 10:17:22 PM 
org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector
   verifyUnmodifiedThrowingCheckedExceptions
   WARNING: Coder of type class org.apache.beam.sdk.coders.SerializableCoder
   has a #structuralValue method which does not return true when the encoding 
of the elements is equal.
   Element 
Shard{source=org.apache.beam.sdk.io.mqtt.MqttIO$UnboundedMqttSource@4776c1e9, 
maxNumRecords=9223372036854775807,
   maxReadTime=PT2S}
   Dec 13, 2021 10:17:22 PM 
org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector
   verifyUnmodifiedThrowingCheckedExceptions
   WARNING: Coder of type class org.apache.beam.sdk.coders.KvCoder
   has a #structuralValue method which does not return true when the encoding 
of the elements is equal.
   Element KV{171548182, 
Shard{source=org.apache.beam.sdk.io.mqtt.MqttIO$UnboundedMqttSource@4776c1e9,
   maxNumRecords=9223372036854775807, maxReadTime=PT2S}}
   Dec 13, 2021 10:17:24 PM 
org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector
   verifyUnmodifiedThrowingCheckedExceptions
   WARNING: Coder of type class org.apache.beam.sdk.coders.SerializableCoder
   has a #structuralValue method which does not return true when the encoding 
of the elements is equal.
   Element 
Shard{source=org.apache.beam.sdk.io.mqtt.MqttIO$UnboundedMqttSource@3be221aa, 
maxNumRecords=9223372036854775807,
   maxReadTime=PT2S}
   Dec 13, 2021 10:17:24 PM 
org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector
   verifyUnmodifiedThrowingCheckedExceptions
   WARNING: Coder of type class org.apache.beam.sdk.coders.SerializableCoder
   has a #structuralValue method which does not return true when the encoding 
of the elements is equal.
   Element 
Shard{source=org.apache.beam.sdk.io.mqtt.MqttIO$UnboundedMqttSource@3be221aa, 
maxNumRecords=9223372036854775807,
   maxReadTime=PT2S}
   Dec 13, 2021 10:17:24 PM org.apache.activemq.broker.BrokerService stop
   INFO: Apache
   ActiveMQ 5.14.5 (localhost, 
ID:apache-ci-beam-jenkins-3-34821-1639433823589-0:2) is shutting down
   Dec
   13, 2021 10:17:24 PM org.apache.activemq.broker.TransportConnector stop
   INFO: Connector mqtt://localhost:45689
   stopped
   Dec 13, 2021 10:17:24 PM org.apache.activemq.broker.BrokerService stop
   INFO: Apache ActiveMQ
   5.14.5 (localhost, ID:apache-ci-beam-jenkins-3-34821-1639433823589-0:2) 
uptime 6.314 seconds
   Dec 13,
   2021 10:17:24 PM org.apache.activemq.broker.BrokerService stop
   INFO: Apache ActiveMQ 5.14.5 (localhost,
   ID:apache-ci-beam-jenkins-3-34821-1639433823589-0:2) is shutdown
   
   ```
   
   
   Imported from Jira 
[BEAM-13453](https://issues.apache.org/jira/browse/BEAM-13453). Original Jira 
may contain additional context.
   Reported by: tvalentyn.


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