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https://issues.apache.org/jira/browse/HBASE-17931?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16073957#comment-16073957
 ] 

Hadoop QA commented on HBASE-17931:
-----------------------------------

| (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 
24s{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 2 new or modified test 
files. {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
32s{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  7m 
21s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  2m 
10s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
23s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 
51s{color} | {color:green} master passed {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red}  1m 
16s{color} | {color:red} hbase-common in master has 2 extant Findbugs warnings. 
{color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red}  6m 
44s{color} | {color:red} hbase-server in master has 10 extant Findbugs 
warnings. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
37s{color} | {color:green} master passed {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 
32s{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  2m 
28s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  2m 
10s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  2m 
10s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
25s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 
49s{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} 
63m  6s{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-alpha3. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  7m 
32s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
41s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  4m 
57s{color} | {color:green} hbase-common in the patch passed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red}257m 24s{color} 
| {color:red} hbase-server in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
44s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}366m  8s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.hbase.regionserver.TestRegionReplicaFailover |
|   | hadoop.hbase.master.procedure.TestMasterProcedureWalLease |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.03.0-ce Server=17.03.0-ce Image:yetus/hbase:757bf37 |
| JIRA Issue | HBASE-17931 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12875620/HBASE-17931.v04.patch 
|
| Optional Tests |  asflicense  javac  javadoc  unit  findbugs  hadoopcheck  
hbaseanti  checkstyle  compile  |
| uname | Linux cb94608d4593 4.8.3-std-1 #1 SMP Fri Oct 21 11:15:43 UTC 2016 
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 / 193a980 |
| Default Java | 1.8.0_131 |
| findbugs | v3.1.0-RC3 |
| findbugs | 
https://builds.apache.org/job/PreCommit-HBASE-Build/7496/artifact/patchprocess/branch-findbugs-hbase-common-warnings.html
 |
| findbugs | 
https://builds.apache.org/job/PreCommit-HBASE-Build/7496/artifact/patchprocess/branch-findbugs-hbase-server-warnings.html
 |
| unit | 
https://builds.apache.org/job/PreCommit-HBASE-Build/7496/artifact/patchprocess/patch-unit-hbase-server.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HBASE-Build/7496/testReport/ |
| modules | C: hbase-common hbase-server U: . |
| Console output | 
https://builds.apache.org/job/PreCommit-HBASE-Build/7496/console |
| Powered by | Apache Yetus 0.4.0   http://yetus.apache.org |


This message was automatically generated.



> Assign system tables to servers with highest version
> ----------------------------------------------------
>
>                 Key: HBASE-17931
>                 URL: https://issues.apache.org/jira/browse/HBASE-17931
>             Project: HBase
>          Issue Type: Bug
>          Components: Region Assignment, scan
>            Reporter: Phil Yang
>            Assignee: Phil Yang
>            Priority: Blocker
>             Fix For: 2.0.0, 1.4.0
>
>         Attachments: HBASE-17931.branch-1.v01.patch, 
> HBASE-17931.branch-1.v02.patch, HBASE-17931.branch-1.v03.patch, 
> HBASE-17931.branch-1.v04.patch, HBASE-17931.branch-1.v04.patch, 
> HBASE-17931.branch-1.v05.patch, HBASE-17931.branch-1.v05.patch, 
> HBASE-17931.branch-1.v06.patch, HBASE-17931.v01.patch, HBASE-17931.v02.patch, 
> HBASE-17931.v03.patch, HBASE-17931.v04.patch
>
>
> In branch-1 and master we have some improvement and new features on scanning 
> which is not compatible.
> A client of old version to a server of new version is compatible (must be a 
> bug if not, maybe need some test?). 
> A client of new version may not be able to read from a server of old version 
> correctly (because of scan limit, moreResults flag, etc), which is ok for 
> major/minor upgrade and we can tell users to upgrade server before upgrading 
> client. But RS also use scan to read meta. If meta table is in RS of old 
> version, all RSs of new version may have trouble while scanning meta table.
> So we should make sure meta table always in servers of new version. Force 
> meta table in Master and upgrade Master first, or assign meta table in region 
> servers with latest version?



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