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Posted to dev@flink.apache.org by "Till Rohrmann (JIRA)" <ji...@apache.org> on 2016/06/20 10:31:05 UTC

[jira] [Created] (FLINK-4094) Off heap memory deallocation might not work properly

Till Rohrmann created FLINK-4094:
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             Summary: Off heap memory deallocation might not work properly
                 Key: FLINK-4094
                 URL: https://issues.apache.org/jira/browse/FLINK-4094
             Project: Flink
          Issue Type: Bug
          Components: Local Runtime
    Affects Versions: 1.1.0
            Reporter: Till Rohrmann
            Priority: Critical
             Fix For: 1.1.0


A user reported that off-heap memory is not properly deallocated when setting {{taskmanager.memory.preallocate:false}} (per default) [1]. This can cause the TaskManager process being killed by the OS.

It should be possible to execute multiple batch jobs with preallocation turned off. No longer used direct memory buffers should be properly garbage collected so that the JVM process does not exceed it's maximum memory bounds.

[1] http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/offheap-memory-allocation-and-memory-leak-bug-td12154.html



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