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Posted to hdfs-issues@hadoop.apache.org by "Vinayakumar B (JIRA)" <ji...@apache.org> on 2018/01/17 10:25:00 UTC
[jira] [Commented] (HDFS-13027) Handle NPE due to deleted blocks in
race condition
[ https://issues.apache.org/jira/browse/HDFS-13027?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16328594#comment-16328594 ]
Vinayakumar B commented on HDFS-13027:
--------------------------------------
One similar issue fixed recently was HDFS-12638, which avoided calls to {{getBlockCollection()}} itself.
> Handle NPE due to deleted blocks in race condition
> --------------------------------------------------
>
> Key: HDFS-13027
> URL: https://issues.apache.org/jira/browse/HDFS-13027
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Reporter: Vinayakumar B
> Assignee: Vinayakumar B
> Priority: Major
>
> Since File deletions and Block removal from BlocksMap done in separate locks, there are possibilities of NPE due to calls of {{blockManager.getBlockCollection(block)}} returning null.
> Handle all possibilities of NPEs due to this.
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