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https://issues.apache.org/jira/browse/HBASE-10699?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15832770#comment-15832770
 ] 

Hadoop QA commented on HBASE-10699:
-----------------------------------

| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 12m 43s 
{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 83 new or modified test 
files. {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 18s 
{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 2m 
58s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 4m 24s 
{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 2m 
1s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 2m 
47s {color} | {color:green} master passed {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red} 0m 16s 
{color} | {color:red} hbase-prefix-tree in master has 1 extant Findbugs 
warnings. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 3m 5s 
{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} scaladoc {color} | {color:green} 2m 
25s {color} | {color:green} master passed {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 9s 
{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 4m 
41s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 3m 56s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 3m 56s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} scalac {color} | {color:green} 3m 56s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 1m 
50s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 2m 
34s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green} 0m 
0s {color} | {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} hadoopcheck {color} | {color:green} 
25m 50s {color} | {color:green} Patch does not cause any errors with Hadoop 
2.6.1 2.6.2 2.6.3 2.6.4 2.6.5 2.7.1 2.7.2 2.7.3 or 3.0.0-alpha1. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 8m 
33s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 2m 48s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} scaladoc {color} | {color:green} 2m 4s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 0m 6s 
{color} | {color:green} hbase-annotations in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 1m 55s 
{color} | {color:green} hbase-common in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 2m 25s 
{color} | {color:green} hbase-procedure in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 1m 2s 
{color} | {color:green} hbase-client in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 0m 19s 
{color} | {color:green} hbase-hadoop2-compat in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 0m 19s 
{color} | {color:green} hbase-prefix-tree in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 83m 23s 
{color} | {color:green} hbase-server in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 0m 28s 
{color} | {color:green} hbase-thrift in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 0m 23s 
{color} | {color:green} hbase-rsgroup in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 5m 8s 
{color} | {color:green} hbase-shell in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 0m 26s 
{color} | {color:green} hbase-endpoint in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 0m 20s 
{color} | {color:green} hbase-it in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 0m 19s 
{color} | {color:green} hbase-examples in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 2m 27s 
{color} | {color:green} hbase-rest in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 0m 52s 
{color} | {color:green} hbase-spark in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 2m 
50s {color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 196m 19s {color} 
| {color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker | Client=1.12.3 Server=1.12.3 Image:yetus/hbase:8d52d23 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12848653/HBASE-10699.master.001.patch
 |
| JIRA Issue | HBASE-10699 |
| Optional Tests |  asflicense  javac  javadoc  unit  findbugs  hadoopcheck  
hbaseanti  checkstyle  compile  scalac  scaladoc  |
| uname | Linux e5a8818a8966 4.4.0-43-generic #63-Ubuntu SMP Wed Oct 12 
13:48:03 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | 
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build@2/component/dev-support/hbase-personality.sh
 |
| git revision | master / 7901805 |
| Default Java | 1.8.0_121 |
| findbugs | v3.0.0 |
| findbugs | 
https://builds.apache.org/job/PreCommit-HBASE-Build/5376/artifact/patchprocess/branch-findbugs-hbase-prefix-tree-warnings.html
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HBASE-Build/5376/testReport/ |
| modules | C: hbase-annotations hbase-common hbase-procedure hbase-client 
hbase-hadoop2-compat hbase-prefix-tree hbase-server hbase-thrift hbase-rsgroup 
hbase-shell hbase-endpoint hbase-it hbase-examples hbase-rest hbase-spark U: . |
| Console output | 
https://builds.apache.org/job/PreCommit-HBASE-Build/5376/console |
| Powered by | Apache Yetus 0.3.0   http://yetus.apache.org |


This message was automatically generated.



> Optimize some code
> ------------------
>
>                 Key: HBASE-10699
>                 URL: https://issues.apache.org/jira/browse/HBASE-10699
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: @deprecated Yi Deng
>            Assignee: Jan Hentschel
>         Attachments: HBASE-10699.master.001.patch
>
>
> 1. Set capacity on ArrayList when possible
> 2. Use isEmpty instead of size() == 0 when possible
> 3. Reduce some unnecessary allocation



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