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From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-10682) Replace FsDatasetImpl object lock with a separate lock object
Date Mon, 01 Aug 2016 23:42:20 GMT

     [ https://issues.apache.org/jira/browse/HDFS-10682?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Arpit Agarwal updated HDFS-10682:
---------------------------------
    Summary: Replace FsDatasetImpl object lock with a separate lock object  (was: Add metric
to measure lock held time in FSDataSetImpl)

> Replace FsDatasetImpl object lock with a separate lock object
> -------------------------------------------------------------
>
>                 Key: HDFS-10682
>                 URL: https://issues.apache.org/jira/browse/HDFS-10682
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode
>            Reporter: Chen Liang
>            Assignee: Chen Liang
>         Attachments: HDFS-10682.001.patch, HDFS-10682.002.patch, HDFS-10682.003.patch,
HDFS-10682.004.patch, HDFS-10682.005.patch, HDFS-10682.006.patch
>
>
> Add a metric to measure the time the lock of FSDataSetImpl is held by a thread. The goal
is to expose this for users to identify operations that locks dataset for long time ("long"
in some sense) and be able to understand/reason/track the operation based on logs.



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