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https://issues.apache.org/jira/browse/HADOOP-15502?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16495486#comment-16495486
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Suma Shivaprasad commented on HADOOP-15502:
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cc [~sean_impala_9b93] / [~jojochuang] Can you please take a look at how this
can be fixed?
> Rolling upgrade from HADOOP 2.x to 3.x breaks due to backward in-compatible
> change in MetricsPlugin interface
> -------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-15502
> URL: https://issues.apache.org/jira/browse/HADOOP-15502
> Project: Hadoop Common
> Issue Type: Task
> Reporter: Suma Shivaprasad
> Priority: Blocker
>
> HADOOP-13660 breaks backward compatibility due to API changes in
> MetricsPlugin. This also breaks rolling upgrades since any client
> implementing this - like HadoopTimelineMetricsSink in Ambari is affected -
> see https://issues.apache.org/jira/browse/AMBARI-20156.
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