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https://issues.apache.org/jira/browse/KAFKA-2466?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14710804#comment-14710804
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Ashish K Singh commented on KAFKA-2466:
---------------------------------------
OK, thanks for taking care of it.
> ConsoleConsumer throws ConcurrentModificationException on termination
> ---------------------------------------------------------------------
>
> Key: KAFKA-2466
> URL: https://issues.apache.org/jira/browse/KAFKA-2466
> Project: Kafka
> Issue Type: Bug
> Components: tools
> Reporter: Ashish K Singh
> Assignee: Ashish K Singh
>
> ConsoleConsumer throws ConcurrentModificationException on termination.
> ST:
> {code}
> Exception in thread "Thread-1" java.util.ConcurrentModificationException:
> KafkaConsumer is not safe for multi-threaded access
> at
> org.apache.kafka.clients.consumer.KafkaConsumer.acquire(KafkaConsumer.java:1169)
> at
> org.apache.kafka.clients.consumer.KafkaConsumer.close(KafkaConsumer.java:1087)
> at kafka.consumer.NewShinyConsumer.close(BaseConsumer.scala:50)
> at kafka.tools.ConsoleConsumer$$anon$1.run(ConsoleConsumer.scala:74)
> {code}
> Other thread which constantly tries to consume is
> {code}
> "main" prio=10 tid=0x00007f3aa800c000 nid=0x1314 runnable [0x00007f3aae37d000]
> 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:87)
> - locked <0x00000000dd1df130> (a sun.nio.ch.Util$2)
> - locked <0x00000000dd1df120> (a java.util.Collections$UnmodifiableSet)
> - locked <0x00000000dd0af720> (a sun.nio.ch.EPollSelectorImpl)
> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
> at org.apache.kafka.common.network.Selector.select(Selector.java:440)
> at org.apache.kafka.common.network.Selector.poll(Selector.java:263)
> at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:221)
> at
> org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.clientPoll(ConsumerNetworkClient.java:274)
> at
> org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:182)
> at
> org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:172)
> at
> org.apache.kafka.clients.consumer.KafkaConsumer.pollOnce(KafkaConsumer.java:779)
> at
> org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:730)
> at kafka.consumer.NewShinyConsumer.receive(BaseConsumer.scala:43)
> at kafka.tools.ConsoleConsumer$.process(ConsoleConsumer.scala:87)
> at kafka.tools.ConsoleConsumer$.run(ConsoleConsumer.scala:54)
> at kafka.tools.ConsoleConsumer$.main(ConsoleConsumer.scala:39)
> at kafka.tools.ConsoleConsumer.main(ConsoleConsumer.scala)
> {code}
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