[ 
https://issues.apache.org/jira/browse/RATIS-512?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16805728#comment-16805728
 ] 

Hadoop QA commented on RATIS-512:
---------------------------------

| (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 
12s{color} | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {color} ||
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue}  0m  
0s{color} | {color:blue} Findbugs executables are not available. {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 3 new or modified test 
files. {color} |
|| || || || {color:brown} master Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  2m 
48s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
49s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
19s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
41s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
53s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
47s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
47s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
11s{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} javadoc {color} | {color:green}  0m 
33s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 13m 31s{color} 
| {color:red} root in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
16s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 21m 11s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | 
ratis.server.simulation.TestLeaderElectionWithSimulatedRpc |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/ratis:date2019-03-30 
|
| JIRA Issue | RATIS-512 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12964296/r512_20190330.patch |
| Optional Tests |  dupname  asflicense  javac  javadoc  unit  findbugs  
checkstyle  compile  |
| uname | Linux 33739354f4e9 4.4.0-139-generic #165~14.04.1-Ubuntu SMP Wed Oct 
31 10:55:11 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | 
/home/jenkins/jenkins-slave/workspace/PreCommit-RATIS-Build/yetus-personality.sh
 |
| git revision | master / d1bc34f |
| maven | version: Apache Maven 3.6.0 
(97c98ec64a1fdfee7767ce5ffb20918da4f719f3; 2018-10-24T18:41:47Z) |
| Default Java | 1.8.0_191 |
| unit | 
https://builds.apache.org/job/PreCommit-RATIS-Build/719/artifact/out/patch-unit-root.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-RATIS-Build/719/testReport/ |
| Max. process+thread count | 2348 (vs. ulimit of 5000) |
| modules | C: ratis-server U: ratis-server |
| Console output | 
https://builds.apache.org/job/PreCommit-RATIS-Build/719/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


This message was automatically generated.



> testLeaderStepDown may fail with NullPointerException
> -----------------------------------------------------
>
>                 Key: RATIS-512
>                 URL: https://issues.apache.org/jira/browse/RATIS-512
>             Project: Ratis
>          Issue Type: Bug
>          Components: test
>            Reporter: Tsz Wo Nicholas Sze
>            Assignee: Tsz Wo Nicholas Sze
>            Priority: Minor
>         Attachments: r512_20190330.patch
>
>
> {code}
> 2019-03-30 04:33:50,166 ERROR ratis.MiniRaftCluster 
> (MiniRaftCluster.java:runWithNewCluster(122)) - Failed 
> org.apache.ratis.MiniRaftCluster$Factory$Get.runWithNewCluster(MiniRaftCluster.java:107)
> java.lang.NullPointerException
>       at org.apache.ratis.MiniRaftCluster.toRaftPeer(MiniRaftCluster.java:384)
>       at 
> org.apache.ratis.MiniRaftCluster.removePeers(MiniRaftCluster.java:431)
>       at 
> org.apache.ratis.server.impl.RaftReconfigurationBaseTest.runTestAddRemovePeers(RaftReconfigurationBaseTest.java:128)
>       at 
> org.apache.ratis.server.impl.RaftReconfigurationBaseTest.lambda$testLeaderStepDown$3(RaftReconfigurationBaseTest.java:121)
>       at 
> org.apache.ratis.MiniRaftCluster$Factory$Get.runWithNewCluster(MiniRaftCluster.java:119)
>       at 
> org.apache.ratis.MiniRaftCluster$Factory$Get.runWithNewCluster(MiniRaftCluster.java:107)
>       at 
> org.apache.ratis.server.impl.RaftReconfigurationBaseTest.testLeaderStepDown(RaftReconfigurationBaseTest.java:121)
>       ...
> {code}



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