hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Tsz Wo Nicholas Sze (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-4702) remove namesystem lock from DatanodeManager#fetchDatanodes
Date Thu, 13 Nov 2014 22:20:34 GMT

     [ https://issues.apache.org/jira/browse/HDFS-4702?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tsz Wo Nicholas Sze updated HDFS-4702:
--------------------------------------
    Issue Type: Sub-task  (was: Bug)
        Parent: HDFS-7396

> remove namesystem lock from DatanodeManager#fetchDatanodes
> ----------------------------------------------------------
>
>                 Key: HDFS-4702
>                 URL: https://issues.apache.org/jira/browse/HDFS-4702
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: namenode
>    Affects Versions: 3.0.0
>            Reporter: Chris Nauroth
>            Assignee: Chris Nauroth
>
> {{DatanodeManager#fetchDatanodes}} currently holds the namesystem read lock while iterating
through data nodes.  This method is called from the namenode web UI.  HDFS-3990 reported a
performance problem in this code path.  This is a follow-up jira to investigate whether or
not we can remove the lock.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message