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https://issues.apache.org/jira/browse/SOLR-12187?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16438241#comment-16438241
 ] 

Lucene/Solr QA commented on SOLR-12187:
---------------------------------------

| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
|| || || || {color:brown} Prechecks {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} compile {color} | {color:green}  1m 
12s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  3m 
18s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  3m 
18s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} Release audit (RAT) {color} | 
{color:green}  3m 18s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} Check forbidden APIs {color} | 
{color:green}  3m 18s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} Validate source patterns {color} | 
{color:green}  3m 18s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 86m  4s{color} 
| {color:red} core in the patch failed. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 95m 46s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | solr.cloud.ZkControllerTest |
|   | solr.search.TestSolr4Spatial2 |
|   | solr.handler.admin.AutoscalingHistoryHandlerTest |
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|| Subsystem || Report/Notes ||
| JIRA Issue | SOLR-12187 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12918690/SOLR-12187.patch |
| Optional Tests |  compile  javac  unit  ratsources  checkforbiddenapis  
validatesourcepatterns  |
| uname | Linux lucene2-us-west.apache.org 4.4.0-112-generic #135-Ubuntu SMP 
Fri Jan 19 11:48:36 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | ant |
| Personality | 
/home/jenkins/jenkins-slave/workspace/PreCommit-SOLR-Build/sourcedir/dev-tools/test-patch/lucene-solr-yetus-personality.sh
 |
| git revision | master / 93f9a65 |
| ant | version: Apache Ant(TM) version 1.9.6 compiled on July 8 2015 |
| Default Java | 1.8.0_152 |
| unit | 
https://builds.apache.org/job/PreCommit-SOLR-Build/51/artifact/out/patch-unit-solr_core.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-SOLR-Build/51/testReport/ |
| modules | C: solr/core U: solr/core |
| Console output | 
https://builds.apache.org/job/PreCommit-SOLR-Build/51/console |
| Powered by | Apache Yetus 0.7.0   http://yetus.apache.org |


This message was automatically generated.



> Replica should watch clusterstate and unload itself if its entry is removed
> ---------------------------------------------------------------------------
>
>                 Key: SOLR-12187
>                 URL: https://issues.apache.org/jira/browse/SOLR-12187
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Cao Manh Dat
>            Assignee: Cao Manh Dat
>            Priority: Major
>         Attachments: SOLR-12187.patch, SOLR-12187.patch, SOLR-12187.patch, 
> SOLR-12187.patch, SOLR-12187.patch
>
>
> With the introduction of autoscaling framework, we have seen an increase in 
> the number of issues related to the race condition between delete a replica 
> and other stuff.
> Case 1: DeleteReplicaCmd failed to send UNLOAD request to a replica, 
> therefore, forcefully remove its entry from clusterstate, but the replica 
> still function normally and be able to become a leader -> SOLR-12176
> Case 2:
>  * DeleteReplicaCmd enqueue a DELETECOREOP (without sending a request to 
> replica because the node is not live)
>  * The node start and the replica get loaded
>  * DELETECOREOP has not processed hence the replica still present in 
> clusterstate --> pass checkStateInZk
>  * DELETECOREOP is executed, DeleteReplicaCmd finished
>  ** result 1: the replica start recovering, finish it and publish itself as 
> ACTIVE --> state of the replica is ACTIVE
>  ** result 2: the replica throw an exception (probably: NPE) 
> --> state of the replica is DOWN, not join leader election



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