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https://issues.apache.org/jira/browse/HIVE-26399?focusedWorklogId=794385&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-794385
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ASF GitHub Bot logged work on HIVE-26399:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 22/Jul/22 21:29
Start Date: 22/Jul/22 21:29
Worklog Time Spent: 10m
Work Description: hsnusonic commented on PR #3446:
URL: https://github.com/apache/hive/pull/3446#issuecomment-1192947565
Toggling this property causes some db operations never end, so I am closing
this PR.
Issue Time Tracking
-------------------
Worklog Id: (was: 794385)
Time Spent: 20m (was: 10m)
> Make DataNucleus use existing connection for value generation
> -------------------------------------------------------------
>
> Key: HIVE-26399
> URL: https://issues.apache.org/jira/browse/HIVE-26399
> Project: Hive
> Issue Type: Improvement
> Components: Metastore
> Reporter: Yu-Wen Lai
> Assignee: Yu-Wen Lai
> Priority: Major
> Labels: pull-request-available
> Time Spent: 20m
> Remaining Estimate: 0h
>
> DataNucleus by default uses a new connection for value generation, so for one
> thread it might take two connections at a time. That causes a problem when
> there are many concurrent requests coming in HMS. If all threads are waiting
> for a new connection, then no threads can proceed.
> We can set datanucleus.valuegeneration.transactionAttribute to "EXISTING" so
> that DataNucleus will take existing connection rather than request a new one
> from pool.
> Ref:
> https://www.datanucleus.org/products/accessplatform/jdo/persistence.html#pmf_properties
>
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