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https://issues.apache.org/jira/browse/HADOOP-7577?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13095072#comment-13095072
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Konstantin Shvachko commented on HADOOP-7577:
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+1 Looks good. Could you please link the respective jira that applied the
change to security branch and / or trunk.
> TT does not start due to backwards compatibility wrt. EventCounter
> ------------------------------------------------------------------
>
> Key: HADOOP-7577
> URL: https://issues.apache.org/jira/browse/HADOOP-7577
> Project: Hadoop Common
> Issue Type: Bug
> Components: metrics
> Affects Versions: 0.22.0
> Reporter: Joep Rottinghuis
> Assignee: Joep Rottinghuis
> Priority: Minor
> Attachments: HADOOP-7577.patch
>
>
> Between metrics1 and mertrics2 EventCounter was moved from o.a.h.log to
> o.a.h.metrics.jvm.
> On 0.20-security a wrapper marked with @Deprecated was added back to
> o.a.h.log for compatibility, the same wrapper exists on trunk, but no on 0.22.
> Without it the TT will fail to start with a ClassNotFoundException.
> Hive configuration also point to this class in the log4j.properties.
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