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https://issues.apache.org/jira/browse/KAFKA-1642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14257788#comment-14257788
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Ewen Cheslack-Postava commented on KAFKA-1642:
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1) Since this method just returns data, it probably just happens to have had to
wait for the lock. Not a big deal, we would expect to see that occasionally.
2) Right now this is expected, as explained in KAFKA-1788. I saw there's patch
for that one now, might help if you tested that out and see if gives the
behavior you were expecting.
3) As you said, known issue so we can leave that for other JIRAs to resolve.
> [Java New Producer Kafka Trunk] CPU Usage Spike to 100% when network
> connection is lost
> ---------------------------------------------------------------------------------------
>
> Key: KAFKA-1642
> URL: https://issues.apache.org/jira/browse/KAFKA-1642
> Project: Kafka
> Issue Type: Bug
> Components: producer
> Affects Versions: 0.8.2
> Reporter: Bhavesh Mistry
> Assignee: Ewen Cheslack-Postava
> Priority: Blocker
> Fix For: 0.8.2
>
> Attachments:
> 0001-Initial-CPU-Hish-Usage-by-Kafka-FIX-and-Also-fix-CLO.patch,
> KAFKA-1642.patch, KAFKA-1642.patch, KAFKA-1642_2014-10-20_17:33:57.patch,
> KAFKA-1642_2014-10-23_16:19:41.patch
>
>
> I see my CPU spike to 100% when network connection is lost for while. It
> seems network IO thread are very busy logging following error message. Is
> this expected behavior ?
> 2014-09-17 14:06:16.830 [kafka-producer-network-thread] ERROR
> org.apache.kafka.clients.producer.internals.Sender - Uncaught error in kafka
> producer I/O thread:
> java.lang.IllegalStateException: No entry found for node -2
> at
> org.apache.kafka.clients.ClusterConnectionStates.nodeState(ClusterConnectionStates.java:110)
> at
> org.apache.kafka.clients.ClusterConnectionStates.disconnected(ClusterConnectionStates.java:99)
> at
> org.apache.kafka.clients.NetworkClient.initiateConnect(NetworkClient.java:394)
> at
> org.apache.kafka.clients.NetworkClient.maybeUpdateMetadata(NetworkClient.java:380)
> at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:174)
> at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:175)
> at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:115)
> at java.lang.Thread.run(Thread.java:744)
> Thanks,
> Bhavesh
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