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From "Hanisha Koneru (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-10713) Throttle FsNameSystem lock warnings
Date Mon, 29 Aug 2016 22:39:22 GMT

     [ https://issues.apache.org/jira/browse/HDFS-10713?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Hanisha Koneru updated HDFS-10713:
----------------------------------
    Status: Patch Available  (was: Open)

Patch 000 suppresses the write lock warnings for 2 mins and reports the first lock warning
after this interval. It also reports the number of suppressed warnings.

> Throttle FsNameSystem lock warnings
> -----------------------------------
>
>                 Key: HDFS-10713
>                 URL: https://issues.apache.org/jira/browse/HDFS-10713
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: logging, namenode
>            Reporter: Arpit Agarwal
>            Assignee: Hanisha Koneru
>         Attachments: HDFS-10713.000.patch
>
>
> The NameNode logs a message if the FSNamesystem write lock is held by a thread for over
1 second. These messages can be throttled to at one most one per x minutes to avoid potentially
filling up NN logs. We can also log the number of suppressed notices since the last log message.



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