[jira] [Updated] (CASSANDRA-4250) Missing arrayOffset in FBUtilities.hash

["Richard Low (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-4250?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Richard Low updated CASSANDRA-4250:
-----------------------------------

    Attachment: CASSANDRA-4250-v1.patch

Patch against 1.1.0
                
> Missing arrayOffset in FBUtilities.hash
> ---------------------------------------
>
>                 Key: CASSANDRA-4250
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4250
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 1.1.0
>            Reporter: Richard Low
>            Assignee: Richard Low
>            Priority: Critical
>             Fix For: 1.0.11
>
>         Attachments: CASSANDRA-4250-v1.patch
>
>
> In CASSANDRA-3869, FBUtilities.hash was optimised to use the backing byte array if there is one.  However, there is a missing +arrayOffset in the offset parameter.
> This can cause incorrect hashes resulting in data going to the wrong place, etc..  I haven't observed any errors directly attributable to this so maybe we are lucky and all backing arrays start at 0 but this could cause data loss in the worst case.

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