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https://issues.apache.org/jira/browse/KAFKA-7057?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16626677#comment-16626677
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Bo Wang commented on KAFKA-7057:
--------------------------------
We also get the same problem. After the heartbeat thread was blocked for more
than session.timeout.ms, the consumer was passively offline. Looking at the
code, there is a synchronized lock in ConsumerNetworkClient.poll. There is a
change in the new version. Is this the solution?
> Consumer stop polling
> ---------------------
>
> Key: KAFKA-7057
> URL: https://issues.apache.org/jira/browse/KAFKA-7057
> Project: Kafka
> Issue Type: Bug
> Components: consumer, controller
> Affects Versions: 0.10.1.1
> Reporter: Moshe Lavi
> Priority: Major
>
> We build 3 Kafka brokers (0.10.1.1) version using Spring Cloud Stream
> consumer to poll messages.
> We encountered consumer lags alerted and found some consumers were blocked
> and not polling anymore messages. This requires us to restart the
> microservice where that consumer resides.
> I wonder if this has to do with lack of available threads or to the fact the
> heartbeat daemon does not exist/work.
> *The thread dump shows:*
> kafka-coordinator-heartbeat-thread | SiteAgreementItem" #4943 daemon prio=5
> os_prio=0 tid=0x00007f3abdd08000 nid=0x83ac waiting for monitor entry
> [0x00007f3a5dcdb000]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at
> org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.disableWakeups(ConsumerNetworkClient.java:409)
> - waiting to lock <*0x00000005df800450*> (a
> org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient)
> at
> org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.pollNoWakeup(ConsumerNetworkClient.java:264)
> at
> org.apache.kafka.clients.consumer.internals.AbstractCoordinator$HeartbeatThread.run(AbstractCoordinator.java:865)
> - locked <0x00000005df800488> (a
> org.apache.kafka.clients.consumer.internals.ConsumerCoordinator)
>
> -kafka-consumer-1" #4940 prio=5 os_prio=0 tid=0x00007f3a8d433800 nid=0x838e
> runnable [0x00007f3a5dedd000]
> java.lang.Thread.State: RUNNABLE
> at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
> at
> sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)
> at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:79)
> at
> sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
> - locked <0x00000005df7705e0> (a sun.nio.ch.Util$2)
> - locked <0x00000005df7705d0> (a
> java.util.Collections$UnmodifiableSet)
> - locked <0x00000005df7705f0> (a sun.nio.ch.EPollSelectorImpl)
> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
> at
> org.apache.kafka.common.network.Selector.select(Selector.java:470)
> at
> org.apache.kafka.common.network.Selector.poll(Selector.java:286)
> at
> org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:260)
> at
> org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:232)
> - locked <*0x00000005df800450*> (a
> org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient)
> at
> org.apache.kafka.clients.consumer.KafkaConsumer.pollOnce(KafkaConsumer.java:1031)
> at
> org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:979)
> at
> org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.run(KafkaMessageListenerContainer.java:532)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at java.lang.Thread.run(Thread.java:745)
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