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From "Aleksey Yeschenko (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-5149) Respect slice count even if column expire mid-request
Date Sun, 09 Jun 2013 23:34:20 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-5149?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13679220#comment-13679220
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Aleksey Yeschenko commented on CASSANDRA-5149:
----------------------------------------------

There is another method that is affected - ExpiringColumn.create() that returns either a DeletedColumn
or an ExpiringColumn instance, called by ColumnSerializer.deserializeColumnBody(). Now, we
already do pass expireBefore to it as a parameter (in a limited way) and it's not (was not)
difficult to make it be derived from read requests' timestamp. Except in one case - row cache
deserialization. The required modifications go beyond the need for Cache API change and I
haven't found a good way to deal with it.
Is there any change we actually will get rid of row cache in 2.0?
                
> Respect slice count even if column expire mid-request
> -----------------------------------------------------
>
>                 Key: CASSANDRA-5149
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5149
>             Project: Cassandra
>          Issue Type: Bug
>    Affects Versions: 0.7.0
>            Reporter: Sylvain Lebresne
>            Assignee: Aleksey Yeschenko
>             Fix For: 2.0
>
>
> This is a follow-up of CASSANDRA-5099.
> If a column expire just while a slice query is performed, it is possible for replicas
to count said column as live but to have the coordinator seeing it as dead when building the
final result. The effect that the query might return strictly less columns that the requested
slice count even though there is some live columns matching the slice predicate but not returned
in the result.

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