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Posted to dev@hive.apache.org by "zhuwei (JIRA)" <ji...@apache.org> on 2018/05/08 03:13:00 UTC

[jira] [Created] (HIVE-19450) OOM due to map join and backup task not invoked

zhuwei created HIVE-19450:
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             Summary: OOM due to map join and backup task not invoked
                 Key: HIVE-19450
                 URL: https://issues.apache.org/jira/browse/HIVE-19450
             Project: Hive
          Issue Type: Bug
            Reporter: zhuwei
            Assignee: zhuwei


Map join task may cause OOM due to orc compression , in most cases , a backup task will be invoked. However , if the size of hash table is close to memory limit, the task which load the hash table will NOT fail . OOM will happen in next task witch do local join. The load task has a backup but next task not. So in this case , the whole query will fail.



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