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https://issues.apache.org/jira/browse/HIVE-6518?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13934667#comment-13934667
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Hive QA commented on HIVE-6518:
-------------------------------
{color:red}Overall{color}: -1 at least one tests failed
Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12634401/HIVE-6518.3.patch
{color:red}ERROR:{color} -1 due to 2 failed/errored test(s), 5389 tests executed
*Failed tests:*
{noformat}
org.apache.hadoop.hive.cli.TestMinimrCliDriver.testCliDriver_auto_sortmerge_join_16
org.apache.hadoop.hive.cli.TestMinimrCliDriver.testCliDriver_bucketmapjoin6
{noformat}
Test results:
http://bigtop01.cloudera.org:8080/job/PreCommit-HIVE-Build/1769/testReport
Console output:
http://bigtop01.cloudera.org:8080/job/PreCommit-HIVE-Build/1769/console
Messages:
{noformat}
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
Tests exited with: TestsFailedException: 2 tests failed
{noformat}
This message is automatically generated.
ATTACHMENT ID: 12634401
> Add a GC canary to the VectorGroupByOperator to flush whenever a GC is
> triggered
> --------------------------------------------------------------------------------
>
> Key: HIVE-6518
> URL: https://issues.apache.org/jira/browse/HIVE-6518
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Affects Versions: 0.13.0
> Reporter: Gopal V
> Assignee: Gopal V
> Priority: Minor
> Attachments: HIVE-6518.1-tez.patch, HIVE-6518.2-tez.patch,
> HIVE-6518.2.patch, HIVE-6518.3.patch
>
>
> The current VectorGroupByOperator implementation flushes the in-memory hashes
> when the maximum entries or fraction of memory is hit.
> This works for most cases, but there are some corner cases where we hit GC
> ovehead limits or heap size limits before either of those conditions are
> reached due to the rest of the pipeline.
> This patch adds a SoftReference as a GC canary. If the soft reference is
> dead, then a full GC pass happened sometime in the near past & the
> aggregation hashtables should be flushed immediately before another full GC
> is triggered.
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