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https://issues.apache.org/jira/browse/HBASE-14940?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15070525#comment-15070525
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Hudson commented on HBASE-14940:
--------------------------------
SUCCESS: Integrated in HBase-1.3-IT #402 (See
[https://builds.apache.org/job/HBase-1.3-IT/402/])
HBASE-14940 Make our unsafe based ops more safe. (anoopsamjohn: rev
4a7565af9cf8ef7e40ef3c592d6815d1b671fb5e)
* hbase-common/src/main/java/org/apache/hadoop/hbase/util/UnsafeAccess.java
* hbase-common/src/main/java/org/apache/hadoop/hbase/util/Bytes.java
* hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FuzzyRowFilter.java
> Make our unsafe based ops more safe
> -----------------------------------
>
> Key: HBASE-14940
> URL: https://issues.apache.org/jira/browse/HBASE-14940
> Project: HBase
> Issue Type: Bug
> Reporter: Anoop Sam John
> Assignee: Anoop Sam John
> Fix For: 2.0.0, 1.2.0, 1.3.0, 1.1.3, 0.98.17, 1.0.4
>
> Attachments: HBASE-14940.patch, HBASE-14940_branch-1.patch,
> HBASE-14940_branch-1.patch, HBASE-14940_branch-1.patch,
> HBASE-14940_branch-1.patch, HBASE-14940_v2.patch
>
>
> Thanks for the nice findings [~ikeda]
> This jira solves 3 issues with Unsafe operations and ByteBufferUtils
> 1. We can do sun unsafe based reads and writes iff unsafe package is
> available and underlying platform is having unaligned-access capability. But
> we were missing the second check
> 2. Java NIO is doing a chunk based copy while doing Unsafe copyMemory. The
> max chunk size is 1 MB. This is done for "A limit is imposed to allow for
> safepoint polling during a large copy" as mentioned in comments in Bits.java.
> We are also going to do same way
> 3. In ByteBufferUtils, when Unsafe is not available and ByteBuffers are off
> heap, we were doing byte by byte operation (read/copy). We can avoid this and
> do better way.
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