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From "Eric Payne (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-7213) processIncrementalBlockReport performance degradation
Date Wed, 08 Oct 2014 21:50:34 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7213?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eric Payne updated HDFS-7213:
-----------------------------
    Attachment: HDFS-7213.1412804753

> processIncrementalBlockReport performance degradation
> -----------------------------------------------------
>
>                 Key: HDFS-7213
>                 URL: https://issues.apache.org/jira/browse/HDFS-7213
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 2.4.0
>            Reporter: Daryn Sharp
>            Assignee: Eric Payne
>            Priority: Critical
>         Attachments: HDFS-7213.1412804753
>
>
> {{BlockManager#processIncrementalBlockReport}} has a debug line that is missing a {{isDebugEnabled}}
check.  The write lock is being held.  Coupled with the increase in incremental block reports
from receiving blocks, under heavy load this log line noticeably degrades performance.



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