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Posted to common-dev@hadoop.apache.org by "Owen O'Malley (Jira)" <ji...@apache.org> on 2022/08/31 16:35:00 UTC

[jira] [Created] (HADOOP-18434) Proxy users do not share RPC connections

Owen O'Malley created HADOOP-18434:
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             Summary: Proxy users do not share RPC connections
                 Key: HADOOP-18434
                 URL: https://issues.apache.org/jira/browse/HADOOP-18434
             Project: Hadoop Common
          Issue Type: Bug
            Reporter: Owen O'Malley
            Assignee: Owen O'Malley


When the Hive MetaStore uses Storage-Based Authorization, it needs to perform checks against the NameNode as the query's user. Unfortunately, RPC's ConnectionId uses the UGI's equal & hash functions, which check for the subject's object equality.

 

Thus, we've seen the HMS spawn thousands of threads before they go idle and are eventually closed. If the peak goes over 10k threads the HMS becomes unstable.



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