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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-5284) Possible assertion triggered in SliceFromReadCommand
Date Mon, 25 Feb 2013 19:08:12 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-5284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13586150#comment-13586150
] 

Jonathan Ellis commented on CASSANDRA-5284:
-------------------------------------------

+1
                
> Possible assertion triggered in SliceFromReadCommand
> ----------------------------------------------------
>
>                 Key: CASSANDRA-5284
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5284
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Sylvain Lebresne
>            Assignee: Sylvain Lebresne
>            Priority: Minor
>             Fix For: 1.1.11
>
>         Attachments: 5284.txt
>
>
> In SliceFromReadCommand.maybeGenerateRetryCommand, the following assertion
> {noformat}
> assert maxLiveColumns <= count;
> {noformat}
> may actually fail. Namely, it asserts that no node has returned more columns that what
was asked for, which in general is true, but can not be if an expiring column is counted as
dead by the replica (but still send as a tombstone) but, due to clock difference, is actually
counted live by the coordinator.
> I note that this is similar to CASSANDRA-5149 in that fixing CASSANDRA-5149 would fix
this too, but in the meantime, this edge case is harmless so there is probably not much point
in keeping the assertion.

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