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https://issues.apache.org/jira/browse/HBASE-7386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16097618#comment-16097618
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Hadoop QA commented on HBASE-7386:
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| (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 
19s{color} | {color:blue} Docker mode activated. {color} |
| {color:blue}0{color} | {color:blue} shelldocs {color} | {color:blue}  0m  
4s{color} | {color:blue} Shelldocs was 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} pylint {color} | {color:green}  0m  
3s{color} | {color:green} There were no new pylint issues. {color} |
| {color:red}-1{color} | {color:red} shellcheck {color} | {color:red}  0m  
4s{color} | {color:red} The patch generated 46 new + 480 unchanged - 18 fixed = 
526 total (was 498) {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} 
29m 25s{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-alpha4. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
14s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 30m 20s{color} | 
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker | Client=1.12.3 Server=1.12.3 Image:yetus/hbase:bdc94b1 |
| JIRA Issue | HBASE-7386 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12878542/HBASE-7386-master-01.patch
 |
| Optional Tests |  asflicense  shellcheck  shelldocs  pylint  |
| uname | Linux 24d9842af88e 3.13.0-119-generic #166-Ubuntu SMP Wed May 3 
12:18:55 UTC 2017 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 / e9d8a7b |
| shellcheck | v0.4.6 |
| pylint | v1.7.2 |
| shellcheck | 
https://builds.apache.org/job/PreCommit-HBASE-Build/7763/artifact/patchprocess/diff-patch-shellcheck.txt
 |
| modules | C: . U: . |
| Console output | 
https://builds.apache.org/job/PreCommit-HBASE-Build/7763/console |
| Powered by | Apache Yetus 0.4.0   http://yetus.apache.org |


This message was automatically generated.



> Investigate providing some supervisor support for znode deletion
> ----------------------------------------------------------------
>
>                 Key: HBASE-7386
>                 URL: https://issues.apache.org/jira/browse/HBASE-7386
>             Project: HBase
>          Issue Type: Task
>          Components: master, regionserver, scripts
>            Reporter: Gregory Chanan
>            Assignee: stack
>            Priority: Blocker
>             Fix For: 3.0.0
>
>         Attachments: HBASE-7386-bin.patch, HBASE-7386-bin-v2.patch, 
> HBASE-7386-bin-v3.patch, HBASE-7386-conf.patch, HBASE-7386-conf-v2.patch, 
> HBASE-7386-conf-v3.patch, HBASE-7386-master-00.patch, 
> HBASE-7386-master-01.patch, HBASE-7386-src.patch, HBASE-7386-v0.patch, 
> supervisordconfigs-v0.patch
>
>
> There a couple of JIRAs for deleting the znode on a process failure:
> HBASE-5844 (RS)
> HBASE-5926 (Master)
> which are pretty neat; on process failure, they delete the znode of the 
> underlying process so HBase can recover faster.
> These JIRAs were implemented via the startup scripts; i.e. the script hangs 
> around and waits for the process to exit, then deletes the znode.
> There are a few problems associated with this approach, as listed in the 
> below JIRAs:
> 1) Hides startup output in script
> https://issues.apache.org/jira/browse/HBASE-5844?focusedCommentId=13463401&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13463401
> 2) two hbase processes listed per launched daemon
> https://issues.apache.org/jira/browse/HBASE-5844?focusedCommentId=13463409&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13463409
> 3) Not run by a real supervisor
> https://issues.apache.org/jira/browse/HBASE-5844?focusedCommentId=13463409&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13463409
> 4) Weird output after kill -9 actual process in standalone mode
> https://issues.apache.org/jira/browse/HBASE-5926?focusedCommentId=13506801&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13506801
> 5) Can kill existing RS if called again
> https://issues.apache.org/jira/browse/HBASE-5844?focusedCommentId=13463401&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13463401
> 6) Hides stdout/stderr[6]
> https://issues.apache.org/jira/browse/HBASE-5844?focusedCommentId=13506832&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13506832
> I suspect running in via something like supervisor.d can solve these issues 
> if we provide the right support.



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