Mailing-List: contact hdfs-issues-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
Reply-To: hdfs-issues@hadoop.apache.org
Date: Fri, 29 Mar 2013 12:58:34 +0000 (UTC)
From: "Hudson (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <JIRA.12638143.1363829279838.75994.1364561914573@arcas>
In-Reply-To: <JIRA.12638143.1363829279838@arcas>
References: <JIRA.12638143.1363829279838@arcas>
Subject: [jira] [Commented] (HDFS-4621) additional logging to help diagnose
 slow QJM logSync
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit


    [ https://issues.apache.org/jira/browse/HDFS-4621?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13617314#comment-13617314 ] 

Hudson commented on HDFS-4621:
------------------------------

Integrated in Hadoop-Hdfs-trunk #1358 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/1358/])
    HDFS-4621. Additional logging to help diagnose slow QJM syncs. Contributed by Todd Lipcon. (Revision 1461777)

     Result = FAILURE
todd : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1461777
Files : 
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/qjournal/client/IPCLoggerChannel.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/qjournal/client/QuorumCall.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/qjournal/server/Journal.java

                
> additional logging to help diagnose slow QJM logSync
> ----------------------------------------------------
>
>                 Key: HDFS-4621
>                 URL: https://issues.apache.org/jira/browse/HDFS-4621
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: ha, qjm
>    Affects Versions: 2.0.3-alpha
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Minor
>             Fix For: 3.0.0, 2.0.5-beta
>
>         Attachments: hdfs-4621.txt
>
>
> I've been working on diagnosing an issue with a cluster which is seeing slow logSync calls occasionally to QJM. Adding a few more pieces of logging would help this:
> - in the warning messages on the client side leading up to a timeout, include which nodes have responded and which ones are still pending
> - on the server side, when we actually call FileChannel.force, log a warning if the sync takes longer than 1 second

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira