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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 updated HDFS-16876:
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Summary: Garbage collect map entries in shared RouterStateIdContext using
information from namenodeResolver instead of the map of active connectionPools.
(was: ConnectionManager should not remove namespaceStateIds from the shared
RouterStateIdContext during pool cleanup.)
> Garbage collect map entries in shared RouterStateIdContext using information
> from namenodeResolver instead of the map of active connectionPools.
> ------------------------------------------------------------------------------------------------------------------------------------------------
>
> 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 namespace to stateId mapping from the shared
> RouterStateIdContext. A mapping is only removed when there is no other
> connectionPool referencing it. When a new connection is created, the stateId
> mapping gets recreated.
> Since the RouterStateIdContext is shared across connections, it is cleaner to
> drive its cleanup using the list of namespaces the router references instead
> of closely tracking the active connections.
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