[jira] [Created] (FLINK-20740) Use managed memory to avoid direct memory OOM error

[Shang Yuanchun (Jira)]

Yingjie Cao created FLINK-20740:
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             Summary: Use managed memory to avoid direct memory OOM error
                 Key: FLINK-20740
                 URL: https://issues.apache.org/jira/browse/FLINK-20740
             Project: Flink
          Issue Type: Bug
          Components: Runtime / Network
    Affects Versions: 1.12.0
            Reporter: Yingjie Cao
             Fix For: 1.13.0


Currently, sort-merge blocking shuffle uses some unmanaged memory for data writing and reading, which means users must increase the size of direct memory, otherwise, one may encounter direct memory OOM error, which is really bad for usability.



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