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https://issues.apache.org/jira/browse/HIVE-25085?focusedWorklogId=596960&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-596960
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ASF GitHub Bot logged work on HIVE-25085:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 14/May/21 22:21
Start Date: 14/May/21 22:21
Worklog Time Spent: 10m
Work Description: kishendas commented on pull request #2238:
URL: https://github.com/apache/hive/pull/2238#issuecomment-841530958
How was this patch tested?
We ran 10 beeline clients concurrently over a span of 6 hours to reproduce
the original problem. With the fix, we were no longer able to reproduce.
Since the testing was manual, is it possible to write a test with multiple
clients/sessions which tests the logic that you have modified ?
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Issue Time Tracking
-------------------
Worklog Id: (was: 596960)
Time Spent: 1h 20m (was: 1h 10m)
> MetaStore Clients are being shared across different sessions
> ------------------------------------------------------------
>
> Key: HIVE-25085
> URL: https://issues.apache.org/jira/browse/HIVE-25085
> Project: Hive
> Issue Type: Bug
> Components: HiveServer2
> Reporter: Steve Carlin
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> The Hive object (and the underlying MetaStoreClient object) seems to be
> getting shared across different sessions. While most operations work, there
> can be occasional glitches.
> One such noted glitch is that when session 1 ends, it closes the connection.
> If session 2 then tries an operation, the first try will fail. Normally this
> can proceed because the RetryingMetaStoreClient will re-establish a new
> connection, but in some operations, the retrying logic will not kick in (by
> design).
> It seems there was an attempt to fix this issue in HIVE-20682. However, this
> implementation seems to be flawed. The HiveSessionImpl object creates a Hive
> object and makes sure all thread queries belonging to the same session will
> run with the same Hive object. The flaw is that the initial Hive Object
> within HiveSessionImpl is created in thread local storage. The thread being
> run at that moment is not session specific. It belongs to a thread pool that
> happens to be handling this specific session.
>
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