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Posted to issues@spark.apache.org by "liupengcheng (JIRA)" <ji...@apache.org> on 2019/01/22 09:00:22 UTC

[jira] [Created] (SPARK-26684) Add logs when allocating large memory for PooledByteBufAllocator

liupengcheng created SPARK-26684:
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             Summary: Add logs when allocating large memory for PooledByteBufAllocator
                 Key: SPARK-26684
                 URL: https://issues.apache.org/jira/browse/SPARK-26684
             Project: Spark
          Issue Type: Improvement
          Components: Shuffle
    Affects Versions: 2.4.0
            Reporter: liupengcheng


Currently, Spark use `PooledByteBufAllocator` to allocate memory for channel reading. However, the allocated heap/offheap memory size is not tracked. Sometimes, this make it difficult to  find out the cause of OOM failures(for instance, direct memory oom). we have to dump the heap and use more advanced tools like MAT to locate the cause.

Actually, we can add some logs for `PooledByteBufAllocator` when allocating large memory, which can facilitate the debugging.



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