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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-3577) TimeoutException When using QuorumEach or ALL consistency on Multi-DC
Date Tue, 06 Dec 2011 14:23:40 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-3577?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13163615#comment-13163615
] 

Hudson commented on CASSANDRA-3577:
-----------------------------------

Integrated in Cassandra-0.8 #409 (See [https://builds.apache.org/job/Cassandra-0.8/409/])
    remove nonlocal DC write optimization
patch by Vijay; reviewed by jbellis for CASSANDRA-3577

jbellis : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1210902
Files : 
* /cassandra/branches/cassandra-0.8/CHANGES.txt
* /cassandra/branches/cassandra-0.8/src/java/org/apache/cassandra/service/StorageProxy.java

                
> TimeoutException When using QuorumEach or ALL consistency on Multi-DC
> ---------------------------------------------------------------------
>
>                 Key: CASSANDRA-3577
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3577
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 0.8.8
>         Environment: JVM
>            Reporter: Vijay
>            Assignee: Vijay
>             Fix For: 0.8.9
>
>         Attachments: 0001-removing-mutation-MultiDC-optimization.patch, 3577.txt
>
>
> Currently we have 
> 1) StorageProxy.sendMessages() sending messages to the first node in the other DC...
 
> 2) A node in the other DC will remove the ForwardHeader and sendRR (Adding a MessageID
to the Queue).
> 3) The receiving node receives the mutation, updates and sends the response to the Original
Co-ordinator.
> 4) Co-Ordinator now checks for the MessageID (which it never had)
> All the Quorum_Each updates fail in the co-ordinator, this issue started showing up after
CASSANDRA-3472 the code was introduced in CASSANDRA-2138 .
> Simple Fix is to remove the optimization in 0.8 and fix it in 1.x because it seems to
me like it needs a change to the Message service version.
> Possible Solution: We might want send the message ID's to be used by the all the nodes
in other DC (Which is currently generated by the node which receives the Forward request see:
(2) ).

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