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Date: Tue, 18 Jul 2017 07:43:00 +0000 (UTC)
From: "Kurt Greaves (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
Message-ID: <JIRA.13029803.1482336131000.270989.1500363780156@Atlassian.JIRA>
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Subject: [jira] [Commented] (CASSANDRA-13069) Local batchlog for MV may not
 be correctly written on node movements
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archived-at: Tue, 18 Jul 2017 07:43:10 -0000


    [ https://issues.apache.org/jira/browse/CASSANDRA-13069?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16091232#comment-16091232 ] 

Kurt Greaves commented on CASSANDRA-13069:
------------------------------------------

[~pauloricardomg] are you still working on this? If you want I can take over.

> Local batchlog for MV may not be correctly written on node movements
> --------------------------------------------------------------------
>
>                 Key: CASSANDRA-13069
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13069
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Materialized Views
>            Reporter: Sylvain Lebresne
>            Assignee: Paulo Motta
>
> Unless I'm really reading this wrong, I think the code [here|https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/service/StorageProxy.java#L829-L843], which comes from CASSANDRA-10674, isn't working properly.
> More precisely, I believe we can have both paired and unpaired mutations, so that both {{if}} can be taken, but if that's the case, the 2nd write to the batchlog will basically overwrite (remove) the batchlog write of the 1st {{if}} and I don't think that's the intention. In practice, this means "paired" mutation won't be in the batchlog, which mean they won't be replayed at all if they fail.


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