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https://issues.apache.org/jira/browse/HIVE-11467?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14681255#comment-14681255
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Hive QA commented on HIVE-11467:
--------------------------------
{color:green}Overall{color}: +1 all checks pass
Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12749692/HIVE-11467.04.patch
{color:green}SUCCESS:{color} +1 9348 tests passed
Test results:
http://ec2-174-129-184-35.compute-1.amazonaws.com/jenkins/job/PreCommit-HIVE-TRUNK-Build/4913/testReport
Console output:
http://ec2-174-129-184-35.compute-1.amazonaws.com/jenkins/job/PreCommit-HIVE-TRUNK-Build/4913/console
Test logs:
http://ec2-174-129-184-35.compute-1.amazonaws.com/logs/PreCommit-HIVE-TRUNK-Build-4913/
Messages:
{noformat}
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
{noformat}
This message is automatically generated.
ATTACHMENT ID: 12749692 - PreCommit-HIVE-TRUNK-Build
> WriteBuffers rounding wbSize to next power of 2 may cause OOM
> -------------------------------------------------------------
>
> Key: HIVE-11467
> URL: https://issues.apache.org/jira/browse/HIVE-11467
> Project: Hive
> Issue Type: Bug
> Components: Hive
> Affects Versions: 1.2.0, 2.0.0
> Reporter: Wei Zheng
> Assignee: Wei Zheng
> Attachments: HIVE-11467.01.patch, HIVE-11467.02.patch,
> HIVE-11467.03.patch, HIVE-11467.04.patch
>
>
> If wbSize passed to WriteBuffers cstr is not power of 2, it will do a
> rounding first to the next power of 2
> {code}
> public WriteBuffers(int wbSize, long maxSize) {
> this.wbSize = Integer.bitCount(wbSize) == 1 ? wbSize :
> (Integer.highestOneBit(wbSize) << 1);
> this.wbSizeLog2 = 31 - Integer.numberOfLeadingZeros(this.wbSize);
> this.offsetMask = this.wbSize - 1;
> this.maxSize = maxSize;
> writePos.bufferIndex = -1;
> nextBufferToWrite();
> }
> {code}
> That may break existing memory consumption assumption for mapjoin, and
> potentially cause OOM.
> The solution will be to pass a power of 2 number as wbSize from upstream
> during hashtable creation, to avoid this late expansion.
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