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https://issues.apache.org/jira/browse/HDFS-4746?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13850944#comment-13850944
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Plamen Jeliazkov commented on HDFS-4746:
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Konstantin,
HDFS-5285 addresses your issue by removing the class cast and just returning if
the block is already completed.
BlockManager.addStoredBlock does not try to class cast BlockCollection anymore.
> ClassCastException in BlockManager.addStoredBlock() due to that blockReceived
> came after file was closed.
> ---------------------------------------------------------------------------------------------------------
>
> Key: HDFS-4746
> URL: https://issues.apache.org/jira/browse/HDFS-4746
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 2.0.3-alpha
> Reporter: Konstantin Shvachko
>
> In some cases the last block replica of a file can be reported after the file
> was closed. In this case file inode is of type INodeFile.
> BlockManager.addStoredBlock() though expects it to be
> INodeFileUnderConstruction, and therefore class cast to
> MutableBlockCollection fails.
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