[jira] [Created] (FLINK-15989) Rewrap OutOfMemoryError in allocateUnpooledOffHeap with better message

[Shang Yuanchun (Jira)]

Andrey Zagrebin created FLINK-15989:
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             Summary: Rewrap OutOfMemoryError in allocateUnpooledOffHeap with better message
                 Key: FLINK-15989
                 URL: https://issues.apache.org/jira/browse/FLINK-15989
             Project: Flink
          Issue Type: Improvement
            Reporter: Andrey Zagrebin
             Fix For: 1.10.1, 1.11.0


Now if Flink allocates direct memory in MemorySegmentFactory#allocateUnpooledOffHeapMemory and its limit is exceeded for any reason, e.g. user code over-allocated direct memory, ByteBuffer#allocateDirect will throw a generic "OutOfMemoryError: Direct buffer memory". We can catch it and add a message which provides more explanation and points to an option taskmanager.memory.task.off-heap.size to increase as a possible solution.



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