Mailing-List: contact issues-help@hbase.apache.org; run by ezmlm
Precedence: bulk
Date: Thu, 8 Sep 2011 20:00:08 +0000 (UTC)
From: "Hudson (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: 
 <2011103160.4655.1315512008601.JavaMail.tomcat@hel.zones.apache.org>
In-Reply-To: 
 <713275572.26197.1308691187783.JavaMail.tomcat@hel.zones.apache.org>
Subject: [jira] [Commented] (HBASE-4015) Refactor the TimeoutMonitor to make
 it less racy
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit


    [ https://issues.apache.org/jira/browse/HBASE-4015?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13100645#comment-13100645 ] 

Hudson commented on HBASE-4015:
-------------------------------

Integrated in HBase-TRUNK #2189 (See [https://builds.apache.org/job/HBase-TRUNK/2189/])
    HBASE-4015 Refactor the TimeoutMonitor to make it less racy
HBASE-4015 Refactor the TimeoutMonitor to make it less racy
HBASE-4015 Refactor the TimeoutMonitor to make it less racy

stack : 
Files : 
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/master/TimeOutManagerCallable.java

stack : 
Files : 
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/master/TimeOutManagerCallable.java

stack : 
Files : 
* /hbase/trunk/CHANGES.txt
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/ipc/HRegionInterface.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/master/ServerManager.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/handler/OpenMetaHandler.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/handler/OpenRegionHandler.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/regionserver/handler/OpenRootHandler.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/zookeeper/ZKAssign.java


> Refactor the TimeoutMonitor to make it less racy
> ------------------------------------------------
>
>                 Key: HBASE-4015
>                 URL: https://issues.apache.org/jira/browse/HBASE-4015
>             Project: HBase
>          Issue Type: Sub-task
>    Affects Versions: 0.90.3
>            Reporter: Jean-Daniel Cryans
>            Assignee: ramkrishna.s.vasudevan
>            Priority: Blocker
>             Fix For: 0.92.0
>
>         Attachments: HBASE-4015_1_trunk.patch, HBASE-4015_2_trunk.patch, HBASE-4015_reprepared_trunk_2.patch, Timeoutmonitor with state diagrams.pdf
>
>
> The current implementation of the TimeoutMonitor acts like a race condition generator, mostly making things worse rather than better. It does it's own thing for a while without caring for what's happening in the rest of the master.
> The first thing that needs to happen is that the regions should not be processed in one big batch, because that sometimes can take minutes to process (meanwhile a region that timed out opening might have opened, then what happens is it will be reassigned by the TimeoutMonitor generating the never ending PENDING_OPEN situation).
> Those operations should also be done more atomically, although I'm not sure how to do it in a scalable way in this case.

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira