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From "T Jake Luciani (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-10357) mmap file boundary selection is broken for some large files
Date Wed, 16 Sep 2015 18:48:45 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-10357?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14790909#comment-14790909
] 

T Jake Luciani commented on CASSANDRA-10357:
--------------------------------------------

{code}
List<Long> boundaries = new ArrayList<>(this.boundaries);
{code} 

The scope of boundaries var is probably why this was overlooked initially. Can you make this
more obvious?
We should add a note in NEWS.txt for users upgrading.  I guess anyone who has compression
turned off potentially needs to run upgradesstables :/

Any way to add a test for this easily?
Can you link the dtest and testall runs?


> mmap file boundary selection is broken for some large files 
> ------------------------------------------------------------
>
>                 Key: CASSANDRA-10357
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10357
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Benedict
>            Assignee: Benedict
>             Fix For: 2.1.10
>
>
> If an early open interval occurs to close to an mmap boundary, the boundary can be lost.
Patch available [here|https://github.com/belliottsmith/cassandra/tree/mmap-boundaries].



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