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From "Chen Liang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-10682) Add metric to measure lock held time in FSDataSetImpl
Date Mon, 25 Jul 2016 20:52:20 GMT

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

Chen Liang updated HDFS-10682:
------------------------------
    Status: In Progress  (was: Patch Available)

> Add metric to measure lock held time in FSDataSetImpl
> -----------------------------------------------------
>
>                 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
>
>
> 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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