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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17869) UnsafeAvailChecker wrongly returns false on ppc
Date Tue, 04 Apr 2017 06:51:41 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17869?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15954660#comment-15954660
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ramkrishna.s.vasudevan commented on HBASE-17869:
------------------------------------------------

I think the issue is that Unsafe is there but one of the impl in it is wrong and so we get
wrong result?
If totally Unsafe is not used then may be they won't get this?

> UnsafeAvailChecker wrongly returns false on ppc
> -----------------------------------------------
>
>                 Key: HBASE-17869
>                 URL: https://issues.apache.org/jira/browse/HBASE-17869
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 1.2.4
>            Reporter: Jerry He
>            Assignee: Jerry He
>            Priority: Minor
>             Fix For: 2.0.0, 1.4.0
>
>         Attachments: HBASE-17869.patch
>
>
> On ppc64 arch,  java.nio.Bits.unaligned() wrongly returns false due to a JDK bug.
> https://bugs.openjdk.java.net/browse/JDK-8165231
> This causes some problem for HBase. i.e. FuzzyRowFilter test fails.
> Fix it by providing a hard-code workaround for the JDK bug.



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