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https://issues.apache.org/jira/browse/KAFKA-1636?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Manikumar resolved KAFKA-1636.
------------------------------
Resolution: Won't Fix
ConsumerIterator waits for the data from the underlying stream. Pl reopen if
you think the issue still exists
> High CPU in very active environment
> -----------------------------------
>
> Key: KAFKA-1636
> URL: https://issues.apache.org/jira/browse/KAFKA-1636
> Project: Kafka
> Issue Type: Bug
> Components: consumer
> Affects Versions: 0.8.0
> Environment: Redhat 64 bit
> 2.6.32-431.23.3.el6.x86_64 #1 SMP Wed Jul 16 06:12:23 EDT 2014 x86_64 x86_64
> x86_64 GNU/Linux
> Reporter: Laurie Turner
> Assignee: Neha Narkhede
>
> Found the same issue on StackOverFlow below:
> http://stackoverflow.com/questions/22983435/kafka-consumer-threads-are-in-waiting-state-and-lag-is-getting-increased
> This is a very busy environment and the majority of the CPU seems to be busy
> in the in the await method.
> 3XMTHREADINFO3 Java callstack:
> 4XESTACKTRACE at sun/misc/Unsafe.park(Native Method)
> 4XESTACKTRACE at
> java/util/concurrent/locks/LockSupport.parkNanos(LockSupport.java:237(Compiled
> Code))
> 4XESTACKTRACE at
> java/util/concurrent/locks/AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2093(Compiled
> Code))
> 4XESTACKTRACE at
> java/util/concurrent/LinkedBlockingQueue.poll(LinkedBlockingQueue.java:478(Compiled
> Code))
> 4XESTACKTRACE at
> kafka/consumer/ConsumerIterator.makeNext(ConsumerIterator.scala:65(Compiled
> Code))
> 4XESTACKTRACE at
> kafka/consumer/ConsumerIterator.makeNext(ConsumerIterator.scala:33(Compiled
> Code))
> 4XESTACKTRACE at
> kafka/utils/IteratorTemplate.maybeComputeNext(IteratorTemplate.scala:61(Compiled
> Code))
> 4XESTACKTRACE at
> kafka/utils/IteratorTemplate.hasNext(IteratorTemplate.scala:53(Compiled Code))
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