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From "Colin Patrick McCabe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8646) Prune cached replicas from DatanodeDescriptor state on replica invalidation
Date Wed, 24 Jun 2015 18:13:06 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8646?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14599869#comment-14599869
] 

Colin Patrick McCabe commented on HDFS-8646:
--------------------------------------------

+1.  Thanks, [~andrew.wang].

> Prune cached replicas from DatanodeDescriptor state on replica invalidation
> ---------------------------------------------------------------------------
>
>                 Key: HDFS-8646
>                 URL: https://issues.apache.org/jira/browse/HDFS-8646
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: caching
>    Affects Versions: 2.3.0
>            Reporter: Andrew Wang
>            Assignee: Andrew Wang
>         Attachments: hdfs-8646.001.patch, hdfs-8646.002.patch
>
>
> Currently we remove blocks from the DD's CachedBlockLists on node failure and on cache
report, but not on replica invalidation. This can lead to an invalid situation where we return
a LocatedBlock with cached locations that are not backed by an on-disk replica.



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