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Posted to dev@kafka.apache.org by "Greg Fodor (JIRA)" <ji...@apache.org> on 2016/04/25 21:00:14 UTC

[jira] [Created] (KAFKA-3619) State lock file handle leaks

Greg Fodor created KAFKA-3619:
---------------------------------

             Summary: State lock file handle leaks
                 Key: KAFKA-3619
                 URL: https://issues.apache.org/jira/browse/KAFKA-3619
             Project: Kafka
          Issue Type: Bug
          Components: streams
    Affects Versions: 0.10.0.0
            Reporter: Greg Fodor
            Assignee: Guozhang Wang
            Priority: Critical


The .lock files in the state store directories do not seem to be having their file handles freed (despite the locks being freed), so on a complex job the
number of file handles in use goes up rapidly as the locks are taken
for the cleanup routine at the end of the thread run loop.  Running lsof shows the number of open filehandles on the .lock file increasing rapidly over time. In a separate test project, I reproduced the issue and determined that in order for the filehandle to be relinquished the FileChannel instance must be properly closed. 

PR:

https://github.com/apache/kafka/pull/1267



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