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From "Hive QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-15565) LLAP: GroupByOperator flushes hash table too frequently
Date Mon, 09 Jan 2017 09:44:58 GMT

    [ https://issues.apache.org/jira/browse/HIVE-15565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15811206#comment-15811206
] 

Hive QA commented on HIVE-15565:
--------------------------------



Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12846265/HIVE-15565.1.patch

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

{color:red}ERROR:{color} -1 due to 6 failed/errored test(s), 10903 tests executed
*Failed tests:*
{noformat}
TestDerbyConnector - did not produce a TEST-*.xml file (likely timed out) (batchId=233)
TestSparkCliDriver - did not produce a TEST-*.xml file (likely timed out) (batchId=122)
	[groupby3_map.q,union26.q,mapreduce1.q,mapjoin_addjar.q,bucket_map_join_spark1.q,udf_example_add.q,multi_insert_with_join.q,sample7.q,auto_join_nulls.q,ppd_outer_join4.q,load_dyn_part8.q,alter_merge_orc.q,sample6.q,bucket_map_join_1.q,auto_sortmerge_join_9.q]
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver[case_sensitivity] (batchId=61)
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver[input_testxpath] (batchId=28)
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver[udf_coalesce] (batchId=75)
org.apache.hadoop.hive.cli.TestMiniLlapLocalCliDriver.testCliDriver[vector_char_simple] (batchId=146)
{noformat}

Test results: https://builds.apache.org/job/PreCommit-HIVE-Build/2839/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/2839/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-2839/

Messages:
{noformat}
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: 6 tests failed
{noformat}

This message is automatically generated.

ATTACHMENT ID: 12846265 - PreCommit-HIVE-Build

> LLAP: GroupByOperator flushes hash table too frequently
> -------------------------------------------------------
>
>                 Key: HIVE-15565
>                 URL: https://issues.apache.org/jira/browse/HIVE-15565
>             Project: Hive
>          Issue Type: Bug
>          Components: llap
>            Reporter: Rajesh Balamohan
>            Assignee: Rajesh Balamohan
>            Priority: Minor
>         Attachments: HIVE-15565.1.patch
>
>
> {{GroupByOperator::isTez}} would be true in LLAP mode. Current memory computations can
go wrong with {{isTez}} checks in {{GroupByOperator}}. For e.g, in a LLAP instance with Xmx128G
and 12 executors, it would start flushing hash table for every record once it reaches around
42GB (hive.tez.container.size=7100, hive.map.aggr.hash.percentmemory=0.5).
> {noformat}
> 2017-01-08T23:40:21,339 INFO  [TezTaskRunner (1480722417364_1922_7_03_000004_1)] org.apache.hadoop.hive.ql.exec.GroupByOperator:
Hash Table flushed: new size = 0
> 2017-01-08T23:40:21,339 INFO  [TezTaskRunner (1480722417364_1922_7_03_000012_1)] org.apache.hadoop.hive.ql.exec.GroupByOperator:
Hash Table flushed: new size = 0
> 2017-01-08T23:40:21,339 INFO  [TezTaskRunner (1480722417364_1922_7_03_000004_1)] org.apache.hadoop.hive.ql.exec.GroupByOperator:
Hash Tbl flush: #hash table = 1
> 2017-01-08T23:40:21,339 INFO  [TezTaskRunner (1480722417364_1922_7_03_000012_1)] org.apache.hadoop.hive.ql.exec.GroupByOperator:
Hash Tbl flush: #hash table = 1
> {noformat}



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