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Posted to issues@tez.apache.org by "Hitesh Shah (JIRA)" <ji...@apache.org> on 2015/05/02 00:33:06 UTC
[jira] [Updated] (TEZ-1421) MRCombiner throws NPE in
MapredWordCount on master branch
[ https://issues.apache.org/jira/browse/TEZ-1421?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Hitesh Shah updated TEZ-1421:
-----------------------------
Priority: Major (was: Critical)
> MRCombiner throws NPE in MapredWordCount on master branch
> ---------------------------------------------------------
>
> Key: TEZ-1421
> URL: https://issues.apache.org/jira/browse/TEZ-1421
> Project: Apache Tez
> Issue Type: Bug
> Reporter: Tsuyoshi Ozawa
> Assignee: Tsuyoshi Ozawa
>
> I tested MapredWordCount against 70GB generated by RandowTextWriter. When a Combiner runs, it throws NPE. It looks setCombinerClass doesn't work correctly.
> {quote}
> Caused by: java.lang.RuntimeException: java.lang.NullPointerException
> at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:131)
> at org.apache.tez.mapreduce.combine.MRCombiner.runOldCombiner(MRCombiner.java:122)
> at org.apache.tez.mapreduce.combine.MRCombiner.combine(MRCombiner.java:112)
> at org.apache.tez.runtime.library.common.shuffle.impl.MergeManager.runCombineProcessor(MergeManager.java:472)
> at org.apache.tez.runtime.library.common.shuffle.impl.MergeManager$InMemoryMerger.merge(MergeManager.java:605)
> at org.apache.tez.runtime.library.common.shuffle.impl.MergeThread.run(MergeThread.java:89)
> {quote}
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