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https://issues.apache.org/jira/browse/MAPREDUCE-1368?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Allen Wittenauer resolved MAPREDUCE-1368.
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Resolution: Won't Fix
Adapter was removed long ago.
> Vertica adapter doesn't use explicity transactions or report progress
> ---------------------------------------------------------------------
>
> Key: MAPREDUCE-1368
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1368
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: contrib/vertica
> Affects Versions: 0.21.0
> Reporter: Omer Trajman
> Assignee: Omer Trajman
>
> The vertica adapter doesn't use explicit transactions, so speculative tasks
> can result in duplicate loads. The JDBC driver supports it so the fix is
> pretty minor. Also the JDBC driver commits synchronously and the adapter
> needs to report progress even if it takes longer than the timeout.
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