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https://issues.apache.org/jira/browse/HDFS-10620?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15393056#comment-15393056
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Akira Ajisaka commented on HDFS-10620:
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Thank you for the comment. I'll revert this commit from branch-2 and branch-2.8
shortly.
> 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: 2.8.0, 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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