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https://issues.apache.org/jira/browse/HBASE-10625?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13914142#comment-13914142
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Hadoop QA commented on HBASE-10625:
-----------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12631454/10625-trunk.txt
against trunk revision .
ATTACHMENT ID: 12631454
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:red}-1 tests included{color}. The patch doesn't appear to include
any new or modified tests.
Please justify why no new tests are needed for this
patch.
Also please list what manual steps were performed to
verify this patch.
{color:green}+1 hadoop1.0{color}. The patch compiles against the hadoop
1.0 profile.
{color:green}+1 hadoop1.1{color}. The patch compiles against the hadoop
1.1 profile.
{color:green}+1 javadoc{color}. The javadoc tool did not generate any
warning messages.
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:red}-1 findbugs{color}. The patch appears to introduce 2 new
Findbugs (version 1.3.9) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:green}+1 lineLengths{color}. The patch does not introduce lines
longer than 100
{color:green}+1 site{color}. The mvn site goal succeeds with this patch.
{color:green}+1 core tests{color}. The patch passed unit tests in .
Test results:
https://builds.apache.org/job/PreCommit-HBASE-Build/8830//testReport/
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/8830//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/8830//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-thrift.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/8830//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/8830//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop2-compat.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/8830//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/8830//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/8830//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/8830//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/8830//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Console output:
https://builds.apache.org/job/PreCommit-HBASE-Build/8830//console
This message is automatically generated.
> Remove unnecessary key compare from AbstractScannerV2.reseekTo
> --------------------------------------------------------------
>
> Key: HBASE-10625
> URL: https://issues.apache.org/jira/browse/HBASE-10625
> Project: HBase
> Issue Type: Bug
> Reporter: Lars Hofhansl
> Attachments: 10625-0.94.txt, 10625-trunk.txt
>
>
> In reseekTo we find this
> {code}
> ...
> compared = compareKey(reader.getComparator(), key, offset, length);
> if (compared < 1) {
> // If the required key is less than or equal to current key, then
> // don't do anything.
> return compared;
> } else {
> ...
> return loadBlockAndSeekToKey(this.block, this.nextIndexedKey,
> false, key, offset, length, false);
> ...
> {code}
> loadBlockAndSeekToKey already does the right thing when a we pass a key that
> sorts before the current key. It's less efficient than this early check, but
> in the vast (all?) cases we pass forward keys (as required by the reseek
> contract). We're optimizing the wrong thing.
> Scanning with the ExplicitColumnTracker is 20-30% faster.
> (I tested with rows of 5 short KVs selected the 2nd and or 4th column)
> I propose simply removing that check.
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