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From "Hive QA (JIRA)" <>
Subject [jira] [Commented] (HIVE-13809) Hybrid Grace Hash Join memory usage estimation didn't take into account the bloom filter size
Date Fri, 17 Jun 2016 10:53:05 GMT


Hive QA commented on HIVE-13809:

Here are the results of testing the latest attachment:

{color:red}ERROR:{color} -1 due to no test(s) being added or modified.

{color:red}ERROR:{color} -1 due to 10 failed/errored test(s), 10233 tests executed
*Failed tests:*

Test results:
Console output:
Test logs:

Executing org.apache.hive.ptest.execution.TestCheckPhase
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: 10 tests failed

This message is automatically generated.

ATTACHMENT ID: 12811158 - PreCommit-HIVE-MASTER-Build

> Hybrid Grace Hash Join memory usage estimation didn't take into account the bloom filter
> ---------------------------------------------------------------------------------------------
>                 Key: HIVE-13809
>                 URL:
>             Project: Hive
>          Issue Type: Bug
>          Components: Hive
>    Affects Versions: 2.0.0, 2.1.0
>            Reporter: Wei Zheng
>            Assignee: Wei Zheng
>         Attachments: HIVE-13809.1.patch
> Memory estimation is important during hash table loading, because we need to make the
decision of whether to load the next hash partition in memory or spill it. If the assumption
is there's enough memory but it turns out not the case, we will run into OOM problem.
> Currently hybrid grace hash join memory usage estimation didn't take into account the
bloom filter size. In large test cases (TB scale) the bloom filter grows as big as hundreds
of MB, big enough to cause estimation error.
> The solution is to count in the bloom filter size into memory estimation.
> Another issue this patch will fix is possible NPE due to object cache reuse during hybrid
grace hash join.

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