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Posted to commits@druid.apache.org by GitBox <gi...@apache.org> on 2020/09/15 03:18:03 UTC

[GitHub] [druid] tianzhipeng-git commented on issue #10384: OutOfMemoryError when hadoop ingest

tianzhipeng-git commented on issue #10384:
URL: https://github.com/apache/druid/issues/10384#issuecomment-692437817


   How many reducers does this hadoop task have? And which `segmentGranularity` and `partitionsSpec` you use?
   
   Maybe you should adjust your ingestion json to make `more segments`, see [partition](https://druid.apache.org/docs/latest/ingestion/index.html#partitioning) and [hadoop-base partition](https://druid.apache.org/docs/latest/ingestion/hadoop.html#partitionsspec)
   
   (BTW, `mapreduce.map.memory.mb` must be a little bigger than `mapred.map.child.java.opts`, same as reduce)
   


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