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https://issues.apache.org/jira/browse/HBASE-12770?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15411285#comment-15411285
 ] 

Hadoop QA commented on HBASE-12770:
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| (/) *{color:green}+1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 10s 
{color} | {color:blue} Docker mode activated. {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 4 new or modified test 
files. {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 13s 
{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 3m 
2s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 46s 
{color} | {color:green} master passed with JDK v1.8.0_101 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 53s 
{color} | {color:green} master passed with JDK v1.7.0_101 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 
48s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
27s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 2m 
51s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 40s 
{color} | {color:green} master passed with JDK v1.8.0_101 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 53s 
{color} | {color:green} master passed with JDK v1.7.0_101 {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 11s 
{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 1m 
6s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 48s 
{color} | {color:green} the patch passed with JDK v1.8.0_101 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 48s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 52s 
{color} | {color:green} the patch passed with JDK v1.7.0_101 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 52s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 
48s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
28s {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} 
27m 20s {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} hbaseprotoc {color} | {color:green} 0m 
26s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 3m 
21s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 39s 
{color} | {color:green} the patch passed with JDK v1.8.0_101 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 52s 
{color} | {color:green} the patch passed with JDK v1.7.0_101 {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 0m 59s 
{color} | {color:green} hbase-client in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 89m 41s 
{color} | {color:green} hbase-server in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 
32s {color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 139m 28s {color} 
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|| Subsystem || Report/Notes ||
| Docker | Client=1.11.2 Server=1.11.2 Image:yetus/hbase:date2016-08-08 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12822498/HBASE-12770-v3.patch |
| JIRA Issue | HBASE-12770 |
| Optional Tests |  asflicense  javac  javadoc  unit  findbugs  hadoopcheck  
hbaseanti  checkstyle  compile  |
| uname | Linux 24516eb540e2 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 / 30d7eea |
| Default Java | 1.7.0_101 |
| Multi-JDK versions |  /usr/lib/jvm/java-8-oracle:1.8.0_101 
/usr/lib/jvm/java-7-openjdk-amd64:1.7.0_101 |
| findbugs | v3.0.0 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HBASE-Build/2993/testReport/ |
| modules | C: hbase-client hbase-server U: . |
| Console output | 
https://builds.apache.org/job/PreCommit-HBASE-Build/2993/console |
| Powered by | Apache Yetus 0.3.0   http://yetus.apache.org |


This message was automatically generated.



> Don't transfer all the queued hlogs of a dead server to the same alive server
> -----------------------------------------------------------------------------
>
>                 Key: HBASE-12770
>                 URL: https://issues.apache.org/jira/browse/HBASE-12770
>             Project: HBase
>          Issue Type: Improvement
>          Components: Replication
>            Reporter: Jianwei Cui
>            Assignee: Phil Yang
>            Priority: Minor
>         Attachments: HBASE-12770-branch-1-v1.patch, 
> HBASE-12770-branch-1-v2.patch, HBASE-12770-branch-1-v3.patch, 
> HBASE-12770-branch-1-v3.patch, HBASE-12770-trunk.patch, HBASE-12770-v1.patch, 
> HBASE-12770-v2.patch, HBASE-12770-v3.patch, HBASE-12770-v3.patch
>
>
> When a region server is down(or the cluster restart), all the hlog queues 
> will be transferred by the same alive region server. In a shared cluster, we 
> might create several peers replicating data to different peer clusters. There 
> might be lots of hlogs queued for these peers caused by several reasons, such 
> as some peers might be disabled, or errors from peer cluster might prevent 
> the replication, or the replication sources may fail to read some hlog 
> because of hdfs problem. Then, if the server is down or restarted, another 
> alive server will take all the replication jobs of the dead server, this 
> might bring a big pressure to resources(network/disk read) of the alive 
> server and also is not fast enough to replicate the queued hlogs. And if the 
> alive server is down, all the replication jobs including that takes from 
> other dead servers will once again be totally transferred to another alive 
> server, this might cause a server have a large number of queued hlogs(in our 
> shared cluster, we find one server might have thousands of queued hlogs for 
> replication). As an optional way, is it reasonable that the alive server only 
> transfer one peer's hlogs from the dead server one time? Then, other alive 
> region servers might have the opportunity to transfer the hlogs of rest 
> peers. This may also help the queued hlogs be processed more fast. Any 
> discussion is welcome.



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