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Posted to dev@hive.apache.org by "Zhihua Deng (Jira)" <ji...@apache.org> on 2023/03/31 09:17:00 UTC

[jira] [Created] (HIVE-27201) Inconsistency between session Hive and thread-local Hive may cause HS2 deadlock

Zhihua Deng created HIVE-27201:
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             Summary: Inconsistency between session Hive and thread-local Hive may cause HS2 deadlock
                 Key: HIVE-27201
                 URL: https://issues.apache.org/jira/browse/HIVE-27201
             Project: Hive
          Issue Type: Bug
          Components: HiveServer2
            Reporter: Zhihua Deng
            Assignee: Zhihua Deng


The HiveServer2’s server handler can switch to process the operation from other session, in such case, the Hive cached in ThreadLocal is not the same as the Hive in SessionState, and can be referenced by another session. 

If the two handlers swap their sessions to process the DatabaseMetaData request, and the HiveMetastoreClientFactory obtains the Hive via Hive.get(), then there is a chance that the deadlock can happen.



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