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https://issues.apache.org/jira/browse/TEZ-704?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14294776#comment-14294776
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tangjunjie commented on TEZ-704:
--------------------------------
hive 0.14 + tez 0.53 +hadoop 2.3.0 cdh5.0.2 . If setting
mapreduce.reduce.cpu.vcores >2 job hang. If setting mapreduce.reduce.cpu.vcores
=1 ,everything is ok.
> Tez MapReduce job hangs if setting mapreduce.reduce.cpu.vcores to be 2
> ----------------------------------------------------------------------
>
> Key: TEZ-704
> URL: https://issues.apache.org/jira/browse/TEZ-704
> Project: Apache Tez
> Issue Type: Bug
> Reporter: Zhenxiao Luo
>
> When running Hive on Tez in EMR hadoop districution, which set
> mapreduce.reduce.cpu.vcores to be 2 in mapred-site.xml, all MapReduce jobs
> get hang, without any progress.
> The problem seems like,
> Hive On Tez sets mapreduce.reduce.cpu.vcores to 2, so its application
> manager asks for a 2 cpu container, but the resource manager could not
> allocate a node for it, since all it has are 1 cpu containers.
> I saw the same problem when running MapReduce Job on Tez when setting
> mapreduce.reduce.cpu.vcores to be 2.
> This could be a bug in Tez MapReduce code.
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