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https://issues.apache.org/jira/browse/HDFS-14598?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16871660#comment-16871660
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Anu Engineer commented on HDFS-14598:
-------------------------------------
Thanks, that was quick. +1, Pending Jenkins.
> Findbugs warning caused by HDFS-12487
> -------------------------------------
>
> Key: HDFS-14598
> URL: https://issues.apache.org/jira/browse/HDFS-14598
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: diskbalancer
> Reporter: Wei-Chiu Chuang
> Assignee: He Xiaoqiao
> Priority: Minor
> Labels: newbie
> Attachments: HDFS-14598.001.patch
>
>
> https://builds.apache.org/job/PreCommit-HDFS-Build/27038/artifact/out/branch-findbugs-hadoop-hdfs-project_hadoop-hdfs-warnings.html
> {noformat}
> Redundant nullcheck of block, which is known to be non-null in
> org.apache.hadoop.hdfs.server.datanode.DiskBalancer$DiskBalancerMover.getBlockToCopy(FsVolumeSpi$BlockIterator,
> DiskBalancerWorkItem)
> Bug type RCN_REDUNDANT_NULLCHECK_OF_NONNULL_VALUE (click for details)
> In class org.apache.hadoop.hdfs.server.datanode.DiskBalancer$DiskBalancerMover
> In method
> org.apache.hadoop.hdfs.server.datanode.DiskBalancer$DiskBalancerMover.getBlockToCopy(FsVolumeSpi$BlockIterator,
> DiskBalancerWorkItem)
> Value loaded from block
> Return value of
> org.apache.hadoop.hdfs.server.datanode.fsdataset.FsVolumeSpi$BlockIterator.nextBlock()
> of type org.apache.hadoop.hdfs.protocol.ExtendedBlock
> Redundant null check at DiskBalancer.java:[line 912]
> {noformat}
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