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https://issues.apache.org/jira/browse/HDFS-16876?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Simbarashe Dzinamarira reassigned HDFS-16876:
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Assignee: Simbarashe Dzinamarira
> Connection manager should not remove namespaceStateId from shared
> RouterStateIdContext during pool cleanup.
> -----------------------------------------------------------------------------------------------------------
>
> Key: HDFS-16876
> URL: https://issues.apache.org/jira/browse/HDFS-16876
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: rbf
> Reporter: Simbarashe Dzinamarira
> Assignee: Simbarashe Dzinamarira
> Priority: Critical
>
> When cleaning up stale connection pools, the ConnectionManager also removes
> the associated namespaceStateId from the shared map in the
> RouterStateIdContext. This is incorrect because this namespaceStateId may
> still be referenced by other connection pools.
> The consequences of this premature removal include
> * No FederatedRouterState being sent back to clients.
> * PoolAlignmentContext objects keeping references to namespaceStateIds
> that's aren't in the shared map.
> https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/ConnectionManager.java#L457
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