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From "Vijay (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-3577) TimeoutException When using QuorumEach or ALL consistency on Multi-DC
Date Thu, 08 Dec 2011 18:49:42 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-3577?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13165424#comment-13165424
] 

Vijay commented on CASSANDRA-3577:
----------------------------------

+1 Thanks!
                
> 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, 1.1
>
>         Attachments: 0001-Mutation-Optimization-for-MultiDC-v2.patch, 0001-Mutation-Optimization-for-MultiDC.patch,
0001-removing-mutation-MultiDC-optimization.patch, 3577-v3.txt, 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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