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https://issues.apache.org/jira/browse/HDFS-7753?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14312550#comment-14312550
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Ravi Prakash commented on HDFS-7753:
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Hi Rakesh! Not very many people use the BackupNode. You might want to check
with Konstantin Svachko about this.
> Fix Multithreaded correctness Warnings in BackupImage.java
> ----------------------------------------------------------
>
> Key: HDFS-7753
> URL: https://issues.apache.org/jira/browse/HDFS-7753
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.7.0
> Reporter: Rakesh R
> Assignee: Rakesh R
> Attachments: HDFS-7753.patch
>
>
> Inconsistent synchronization of
> org.apache.hadoop.hdfs.server.namenode.BackupImage.namesystem; locked 60% of
> time
> {code}
> Bug type IS2_INCONSISTENT_SYNC (click for details)
> In class org.apache.hadoop.hdfs.server.namenode.BackupImage
> Field org.apache.hadoop.hdfs.server.namenode.BackupImage.namesystem
> Synchronized 60% of the time
> Unsynchronized access at BackupImage.java:[line 97]
> Unsynchronized access at BackupImage.java:[line 261]
> Synchronized access at BackupImage.java:[line 197]
> Synchronized access at BackupImage.java:[line 212]
> Synchronized access at BackupImage.java:[line 295]
> {code}
> https://builds.apache.org/job/PreCommit-HDFS-Build/9493//artifact/patchprocess/newPatchFindbugsWarningshadoop-hdfs.html#Details
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