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https://issues.apache.org/jira/browse/HBASE-15205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15150429#comment-15150429
 ] 

Hadoop QA commented on HBASE-15205:
-----------------------------------

| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 0s 
{color} | {color:blue} Docker mode activated. {color} |
| {color:green}+1{color} | {color:green} hbaseanti {color} | {color:green} 0m 
0s {color} | {color:green} Patch does not have any anti-patterns. {color} |
| {color:green}+1{color} | {color:green} @author {color} | {color:green} 0m 0s 
{color} | {color:green} The patch does not contain any @author tags. {color} |
| {color:green}+1{color} | {color:green} test4tests {color} | {color:green} 0m 
0s {color} | {color:green} The patch appears to include 25 new or modified test 
files. {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 3m 
11s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 40s 
{color} | {color:green} master passed with JDK v1.8.0_72 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 40s 
{color} | {color:green} master passed with JDK v1.7.0_95 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 4m 
43s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
19s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 2m 8s 
{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 33s 
{color} | {color:green} master passed with JDK v1.8.0_72 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 38s 
{color} | {color:green} master passed with JDK v1.7.0_95 {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m 
51s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 40s 
{color} | {color:green} the patch passed with JDK v1.8.0_72 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 40s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 40s 
{color} | {color:green} the patch passed with JDK v1.7.0_95 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 40s 
{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red} 4m 39s 
{color} | {color:red} Patch generated 3 new checkstyle issues in hbase-server 
(total was 449, now 449). {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
19s {color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} whitespace {color} | {color:red} 0m 0s 
{color} | {color:red} The patch has 2 line(s) that end in whitespace. Use git 
apply --whitespace=fix. {color} |
| {color:green}+1{color} | {color:green} hadoopcheck {color} | {color:green} 
25m 45s {color} | {color:green} Patch does not cause any errors with Hadoop 
2.4.0 2.4.1 2.5.0 2.5.1 2.5.2 2.6.1 2.6.2 2.6.3 2.7.1. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 2m 
19s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 31s 
{color} | {color:green} the patch passed with JDK v1.8.0_72 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 39s 
{color} | {color:green} the patch passed with JDK v1.7.0_95 {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 104m 9s {color} 
| {color:red} hbase-server in the patch failed with JDK v1.8.0_72. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 100m 33s 
{color} | {color:green} hbase-server in the patch passed with JDK v1.7.0_95. 
{color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 
20s {color} | {color:green} Patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 255m 9s {color} 
| {color:black} {color} |
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|| Reason || Tests ||
| JDK v1.8.0_72 Timed out junit tests | 
org.apache.hadoop.hbase.regionserver.TestHRegion |
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|| Subsystem || Report/Notes ||
| Docker | Client=1.9.1 Server=1.9.1 Image:yetus/hbase:date2016-02-17 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12788193/HBASE-15205_4.patch |
| JIRA Issue | HBASE-15205 |
| Optional Tests |  asflicense  javac  javadoc  unit  findbugs  hadoopcheck  
hbaseanti  checkstyle  compile  |
| uname | Linux c94c40516279 3.13.0-36-lowlatency #63-Ubuntu SMP PREEMPT Wed 
Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | 
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/component/dev-support/hbase-personality.sh
 |
| git revision | master / 9f8273e |
| findbugs | v3.0.0 |
| checkstyle | 
https://builds.apache.org/job/PreCommit-HBASE-Build/564/artifact/patchprocess/diff-checkstyle-hbase-server.txt
 |
| whitespace | 
https://builds.apache.org/job/PreCommit-HBASE-Build/564/artifact/patchprocess/whitespace-eol.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-HBASE-Build/564/artifact/patchprocess/patch-unit-hbase-server-jdk1.8.0_72.txt
 |
| unit test logs |  
https://builds.apache.org/job/PreCommit-HBASE-Build/564/artifact/patchprocess/patch-unit-hbase-server-jdk1.8.0_72.txt
 |
| JDK v1.7.0_95  Test Results | 
https://builds.apache.org/job/PreCommit-HBASE-Build/564/testReport/ |
| modules | C: hbase-server U: hbase-server |
| Max memory used | 403MB |
| Powered by | Apache Yetus 0.1.0   http://yetus.apache.org |
| Console output | 
https://builds.apache.org/job/PreCommit-HBASE-Build/564/console |


This message was automatically generated.



> Do not find the replication scope for every WAL#append()
> --------------------------------------------------------
>
>                 Key: HBASE-15205
>                 URL: https://issues.apache.org/jira/browse/HBASE-15205
>             Project: HBase
>          Issue Type: Sub-task
>          Components: regionserver
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: ramkrishna.s.vasudevan
>            Priority: Minor
>             Fix For: 2.0.0
>
>         Attachments: HBASE-15205.patch, HBASE-15205_1.patch, 
> HBASE-15205_2.patch, HBASE-15205_3.patch, HBASE-15205_4.patch, 
> ScopeWALEdits.jpg, ScopeWALEdits_afterpatch.jpg
>
>
> After the byte[] and char[] the other top contributor for lot of GC (though 
> it is only 2.86%) is the UTF_8.newDecoder.
> This happens because for every WAL append we try to calculate the replication 
> scope associate with the families associated with the TableDescriptor. I 
> think per WAL append doing this is very costly and creates lot of garbage. 



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