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https://issues.apache.org/jira/browse/TEZ-2864?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rohini Palaniswamy resolved TEZ-2864.
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Resolution: Invalid
Will be handling this in Pig.
> Vertex group output commit overwrites without failing on conflict
> -----------------------------------------------------------------
>
> Key: TEZ-2864
> URL: https://issues.apache.org/jira/browse/TEZ-2864
> Project: Apache Tez
> Issue Type: Bug
> Reporter: Rohini Palaniswamy
>
> We encountered PIG-4649 with HCatStorer where it was hardcoding the part
> file name and not honoring mapreduce.output.basename. If there were two
> vertex groups writing to same output directory one was overwriting another as
> file names were same without part-v000-o000 prefix. Tez should fail the job
> in that case instead of silently losing data.
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