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From "Marcus Eriksson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-12489) consecutive repairs of same range always finds 'out of sync' in sane cluster
Date Mon, 06 Mar 2017 20:46:33 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-12489?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15898060#comment-15898060
] 

Marcus Eriksson commented on CASSANDRA-12489:
---------------------------------------------

the idea is that with incremental repairs we don't need to use the tools that split the ranges,
instead the amount of data to repair is small since we only include unrepaired data

> consecutive repairs of same range always finds 'out of sync' in sane cluster
> ----------------------------------------------------------------------------
>
>                 Key: CASSANDRA-12489
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12489
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Streaming and Messaging
>            Reporter: Benjamin Roth
>            Assignee: Benjamin Roth
>              Labels: lhf
>         Attachments: trace_3_10.1.log.gz, trace_3_10.2.log.gz, trace_3_10.3.log.gz, trace_3_10.4.log.gz,
trace_3_9.1.log.gz, trace_3_9.2.log.gz
>
>
> No matter how often or when I run the same subrange repair, it ALWAYS tells me that some
ranges are our of sync. Tested in 3.9 + 3.10 (git trunk of 2016-08-17). The cluster is sane.
All nodes are up, cluster is not overloaded.
> I guess this is not a desired behaviour. I'd expect that a repair does what it says and
a consecutive repair shouldn't report "out of syncs" any more if the cluster is sane.
> Especially for tables with MVs that puts a lot of pressure during repair as ranges are
repaired over and over again.
> See traces of different runs attached.



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