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https://issues.apache.org/jira/browse/HIVE-16979?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16513938#comment-16513938
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Hive QA commented on HIVE-16979:
--------------------------------
Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12927734/HIVE-16979.4.patch
{color:red}ERROR:{color} -1 due to no test(s) being added or modified.
{color:green}SUCCESS:{color} +1 due to 14531 tests passed
Test results:
https://builds.apache.org/job/PreCommit-HIVE-Build/11803/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/11803/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-11803/
Messages:
{noformat}
Executing org.apache.hive.ptest.execution.TestCheckPhase
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.YetusPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
{noformat}
This message is automatically generated.
ATTACHMENT ID: 12927734 - PreCommit-HIVE-Build
> Cache UGI for metastore
> -----------------------
>
> Key: HIVE-16979
> URL: https://issues.apache.org/jira/browse/HIVE-16979
> Project: Hive
> Issue Type: Improvement
> Reporter: Tao Li
> Assignee: Daniel Dai
> Priority: Major
> Attachments: HIVE-16979.1.patch, HIVE-16979.2.patch,
> HIVE-16979.3.patch, HIVE-16979.4.patch
>
>
> FileSystem.closeAllForUGI is called per request against metastore to dispose
> UGI, which involves talking to HDFS name node and is time consuming. So the
> perf improvement would be caching and reusing the UGI.
> Per FileSystem.closeAllForUG call could take up to 20 ms as E2E latency
> against HDFS. Usually a Hive query could result in several calls against
> metastore, so we can save up to 50-100 ms per hive query.
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