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https://issues.apache.org/jira/browse/HDFS-10620?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15393059#comment-15393059
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Akira Ajisaka commented on HDFS-10620:
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Reverted. Thanks [~jzhuge]! I'll upload a patch for the backport.
> StringBuilder created and appended even if logging is disabled
> --------------------------------------------------------------
>
> Key: HDFS-10620
> URL: https://issues.apache.org/jira/browse/HDFS-10620
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 2.6.4
> Reporter: Staffan Friberg
> Assignee: Staffan Friberg
> Fix For: 3.0.0-alpha2
>
> Attachments: HDFS-10620.001.patch, HDFS-10620.002.patch
>
>
> In BlockManager.addToInvalidates the StringBuilder is appended to during the
> delete even if logging isn't active.
> Could avoid allocating the StringBuilder as well, but not sure if it is
> really worth it to add null handling in the code.
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