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From "Hive QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-15881) Use new thread count variable name instead of mapred.dfsclient.parallelism.max
Date Wed, 15 Feb 2017 06:18:41 GMT

    [ https://issues.apache.org/jira/browse/HIVE-15881?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15867321#comment-15867321
] 

Hive QA commented on HIVE-15881:
--------------------------------



Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12852686/HIVE-15881.1.patch

{color:green}SUCCESS:{color} +1 due to 1 test(s) being added or modified.

{color:red}ERROR:{color} -1 due to 8 failed/errored test(s), 10238 tests executed
*Failed tests:*
{noformat}
TestDerbyConnector - did not produce a TEST-*.xml file (likely timed out) (batchId=235)
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver[cbo_rp_auto_join1] (batchId=3)
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver[join31] (batchId=81)
org.apache.hadoop.hive.cli.TestEncryptedHDFSCliDriver.testCliDriver[encryption_join_with_different_encryption_keys]
(batchId=159)
org.apache.hadoop.hive.cli.TestMiniLlapLocalCliDriver.testCliDriver[multiMapJoin2] (batchId=152)
org.apache.hadoop.hive.cli.TestPerfCliDriver.testCliDriver[query14] (batchId=223)
org.apache.hadoop.hive.cli.TestPerfCliDriver.testCliDriver[query23] (batchId=223)
org.apache.hadoop.hive.cli.TestSparkCliDriver.testCliDriver[join31] (batchId=133)
{noformat}

Test results: https://builds.apache.org/job/PreCommit-HIVE-Build/3558/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/3558/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-3558/

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: 8 tests failed
{noformat}

This message is automatically generated.

ATTACHMENT ID: 12852686 - PreCommit-HIVE-Build

> Use new thread count variable name instead of mapred.dfsclient.parallelism.max
> ------------------------------------------------------------------------------
>
>                 Key: HIVE-15881
>                 URL: https://issues.apache.org/jira/browse/HIVE-15881
>             Project: Hive
>          Issue Type: Task
>          Components: Query Planning
>            Reporter: Sergio Peña
>            Assignee: Sergio Peña
>            Priority: Minor
>         Attachments: HIVE-15881.1.patch
>
>
> The Utilities class has two methods, {{getInputSummary}} and {{getInputPaths}}, that
use the variable {{mapred.dfsclient.parallelism.max}} to get the summary of a list of input
locations in parallel. These methods are Hive related, but the variable name does not look
it is specific for Hive.
> Also, the above variable is not on HiveConf nor used anywhere else. I just found a reference
on the Hadoop MR1 code.
> I'd like to propose the deprecation of {{mapred.dfsclient.parallelism.max}}, and use
a different variable name, such as {{hive.get.input.listing.num.threads}}, that reflects the
intention of the variable. The removal of the old variable might happen on Hive 3.x



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