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Posted to issues@flink.apache.org by "Nico Kruber (JIRA)" <ji...@apache.org> on 2018/07/05 10:41:00 UTC

[jira] [Created] (FLINK-9761) Potential buffer leak in PartitionRequestClientHandler during job failures

Nico Kruber created FLINK-9761:
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             Summary: Potential buffer leak in PartitionRequestClientHandler during job failures
                 Key: FLINK-9761
                 URL: https://issues.apache.org/jira/browse/FLINK-9761
             Project: Flink
          Issue Type: Bug
          Components: Network
    Affects Versions: 1.5.0
            Reporter: Nico Kruber
            Assignee: Nico Kruber
             Fix For: 1.6.0, 1.5.2


{{PartitionRequestClientHandler#stagedMessages}} may be accessed from multiple threads:
1) Netty's IO thread
2) During cancellation, {{PartitionRequestClientHandler.BufferListenerTask#notifyBufferDestroyed}} is called

If {{PartitionRequestClientHandler.BufferListenerTask#notifyBufferDestroyed}} thinks, {{stagesMessages}} is empty, however, it will not install the {{stagedMessagesHandler}} that consumes and releases buffers from received messages.
Unless some unexpected combination of code calls prevents this from happening, this would leak the non-recycled buffers.



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