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https://issues.apache.org/jira/browse/KAFKA-1804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14953030#comment-14953030
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Vladimir Picka commented on KAFKA-1804:
---------------------------------------
Hello, I just would like to report that this error was thrown after 4 days run
on Kafka version: kafka-0.8.2.2-2.11. Unfortunately we were not able to
reproduce the error yet. I just want to increase the attention to this issue.
{code}
[2015-10-08 14:40:47,176] ERROR Uncaught exception in thread
'kafka-network-thread-9092-1': (kafka.utils.Utils$)
java.util.NoSuchElementException: None.get
at scala.None$.get(Option.scala:347)
at scala.None$.get(Option.scala:345)
at kafka.network.ConnectionQuotas.dec(SocketServer.scala:524)
at kafka.network.AbstractServerThread.close(SocketServer.scala:165)
at kafka.network.AbstractServerThread.close(SocketServer.scala:157)
at kafka.network.Processor.close(SocketServer.scala:374)
at kafka.network.Processor.processNewResponses(SocketServer.scala:406)
at kafka.network.Processor.run(SocketServer.scala:318)
at java.lang.Thread.run(Thread.java:745)
[2015-10-08 14:40:47,177] INFO Closing socket connection to /10.33.167.154.
(kafka.network.Processor)
[2015-10-08 14:40:47,177] INFO Closing socket connection to /10.33.167.154.
(kafka.network.Processor)
[2015-10-08 14:40:47,177] INFO Closing socket connection to /10.33.167.154.
(kafka.network.Processor)
[2015-10-08 14:40:47,177] ERROR Uncaught exception in thread
'kafka-network-thread-9092-0': (kafka.utils.Utils$)
java.util.NoSuchElementException: None.get
at scala.None$.get(Option.scala:347)
at scala.None$.get(Option.scala:345)
at kafka.network.ConnectionQuotas.dec(SocketServer.scala:524)
at kafka.network.AbstractServerThread.close(SocketServer.scala:165)
at kafka.network.AbstractServerThread.close(SocketServer.scala:157)
at kafka.network.Processor.close(SocketServer.scala:374)
at kafka.network.Processor.run(SocketServer.scala:350)
at java.lang.Thread.run(Thread.java:745)
{code}
> Kafka network thread lacks top exception handler
> ------------------------------------------------
>
> Key: KAFKA-1804
> URL: https://issues.apache.org/jira/browse/KAFKA-1804
> Project: Kafka
> Issue Type: Bug
> Components: core
> Affects Versions: 0.8.2.0
> Reporter: Oleg Golovin
> Priority: Critical
>
> We have faced the problem that some kafka network threads may fail, so that
> jstack attached to Kafka process showed fewer threads than we had defined in
> our Kafka configuration. This leads to API requests processed by this thread
> getting stuck unresponed.
> There were no error messages in the log regarding thread failure.
> We have examined Kafka code to find out there is no top try-catch block in
> the network thread code, which could at least log possible errors.
> Could you add top-level try-catch block for the network thread, which should
> recover network thread in case of exception?
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