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https://issues.apache.org/jira/browse/HIVE-22492?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16974139#comment-16974139
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Hive QA commented on HIVE-22492:
--------------------------------
Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12985775/HIVE-22492.patch
{color:green}SUCCESS:{color} +1 due to 2 test(s) being added or modified.
{color:red}ERROR:{color} -1 due to 5 failed/errored test(s), 17702 tests
executed
*Failed tests:*
{noformat}
TestStatsReplicationScenariosACIDNoAutogather - did not produce a TEST-*.xml
file (likely timed out) (batchId=256)
org.apache.hadoop.hive.cli.TestContribCliDriver.testCliDriver[url_hook]
(batchId=295)
org.apache.hadoop.hive.metastore.TestHiveMetaStoreAlterColumnPar.org.apache.hadoop.hive.metastore.TestHiveMetaStoreAlterColumnPar
(batchId=248)
org.apache.hadoop.hive.metastore.TestPartitionManagement.testPartitionDiscoveryTransactionalTable
(batchId=224)
org.apache.hive.jdbc.TestSSL.testMetastoreConnectionWrongCertCN (batchId=284)
{noformat}
Test results:
https://builds.apache.org/job/PreCommit-HIVE-Build/19417/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/19417/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-19417/
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
Tests exited with: TestsFailedException: 5 tests failed
{noformat}
This message is automatically generated.
ATTACHMENT ID: 12985775 - PreCommit-HIVE-Build
> Amortize lock contention due to LRFU accounting
> -----------------------------------------------
>
> Key: HIVE-22492
> URL: https://issues.apache.org/jira/browse/HIVE-22492
> Project: Hive
> Issue Type: Improvement
> Reporter: Slim Bouguerra
> Assignee: Slim Bouguerra
> Priority: Major
> Attachments: HIVE-22492.patch, llap-lock-contention.svg
>
>
> LRFU eviction policy can be a major source of contention under high load.
> This can be see on the following profiles.
> To fix this the idea is to use a batching wrapper to amortize the locking
> contention.
> The trick i a common way to amortize locking as explained here
> http://www.ece.eng.wayne.edu/~sjiang/pubs/papers/ding-09-BP-Wrapper.pdf
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