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From "Benedict (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-6912) SSTableReader.isReplaced does not allow for safe resource cleanup
Date Tue, 01 Apr 2014 22:29:15 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-6912?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13957094#comment-13957094
] 

Benedict commented on CASSANDRA-6912:
-------------------------------------

Dagnabit. Good catch - I originally had this bundled up with two other patches, and in separating
them I was apparently not as careful as I had thought. The whole of tidy() was scheduled,
and I thought I didn't need that after I extracted this (for reasons I won't get into). I'll
reintroduce it.

> SSTableReader.isReplaced does not allow for safe resource cleanup
> -----------------------------------------------------------------
>
>                 Key: CASSANDRA-6912
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6912
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Benedict
>            Assignee: Benedict
>             Fix For: 2.1 beta2
>
>
> There are a number of possible race conditions on resource cleanup from the use of cloneWithNewSummarySamplingLevel,
because the replacement sstable can be itself replaced/obsoleted while the prior sstable is
still referenced (this is actually quite easy with compaction, but can happen in other circumstances
less commonly).



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