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https://issues.apache.org/jira/browse/HBASE-3061?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12916784#action_12916784
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ryan rawson commented on HBASE-3061:
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i think we have depended on volatile longs for quite a while... But doing some
research I realize now that volatile longs being atomic have been guaranteed
since 1.5, I thought it depended on x64 instructions but it is not the case.
So HBase does not _require_ a 64 bit jvm, but considering the 32bit jvm
supports about 1.2-1.9gb heap we might not be able to do much there.
There might be other areas requiring it, but volatile longs isn't it. We do
require 1.6 as always of course.
> 64-bit JVM required since 0.20.6 and 0.89
> -----------------------------------------
>
> Key: HBASE-3061
> URL: https://issues.apache.org/jira/browse/HBASE-3061
> Project: HBase
> Issue Type: Bug
> Components: documentation
> Reporter: Andrew Purtell
> Assignee: Andrew Purtell
> Fix For: 0.20.7, 0.89.20100924, 0.90.0
>
> Attachments: HBASE-3061.patch
>
>
> Requirements documentation update.
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