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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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Description:
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
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]
was:
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
> ConnectionManager should not remove namespaceStateIds from the 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
> 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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