hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Yiqun Lin (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-13769) Namenode gets stuck when deleting large dir in trash
Date Fri, 27 Jul 2018 02:47:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-13769?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Yiqun Lin updated HDFS-13769:
-----------------------------
    Status: Patch Available  (was: Open)

> Namenode gets stuck when deleting large dir in trash
> ----------------------------------------------------
>
>                 Key: HDFS-13769
>                 URL: https://issues.apache.org/jira/browse/HDFS-13769
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: 3.1.0, 2.8.2
>            Reporter: Tao Jie
>            Assignee: Tao Jie
>            Priority: Major
>         Attachments: HDFS-13769.001.patch
>
>
> Similar to the situation discussed in HDFS-13671, Namenode gets stuck for a long time
when deleting trash dir with a large mount of data. We found log in namenode:
> {quote}
> 2018-06-08 20:00:59,042 INFO namenode.FSNamesystem (FSNamesystemLock.java:writeUnlock(252))
- FSNamesystem write lock held for 23018 ms via
> java.lang.Thread.getStackTrace(Thread.java:1552)
> org.apache.hadoop.util.StringUtils.getStackTrace(StringUtils.java:1033)
> org.apache.hadoop.hdfs.server.namenode.FSNamesystemLock.writeUnlock(FSNamesystemLock.java:254)
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.writeUnlock(FSNamesystem.java:1567)
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.delete(FSNamesystem.java:2820)
> org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.delete(NameNodeRpcServer.java:1047)
> {quote}
> One simple solution is to avoid deleting large data in one delete RPC call. We implement
a trashPolicy that divide the delete operation into several delete RPCs, and each single deletion
would not delete too many files.
> Any thought? [~linyiqun]



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

---------------------------------------------------------------------
To unsubscribe, e-mail: hdfs-issues-unsubscribe@hadoop.apache.org
For additional commands, e-mail: hdfs-issues-help@hadoop.apache.org


Mime
View raw message