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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7386) Investigate providing some supervisor support for znode deletion
Date Thu, 20 Jul 2017 20:41:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16095330#comment-16095330
] 

Hadoop QA commented on HBASE-7386:
----------------------------------

| (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 18s{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:red}-1{color} | {color:red} pylint {color} | {color:red}  0m  1s{color} | {color:red}
The patch generated 6 new + 0 unchanged - 0 fixed = 6 total (was 0) {color} |
| {color:red}-1{color} | {color:red} shellcheck {color} | {color:red}  0m  7s{color} | {color:red}
The patch generated 153 new + 489 unchanged - 9 fixed = 642 total (was 498) {color} |
| {color:red}-1{color} | {color:red} whitespace {color} | {color:red}  0m  0s{color} | {color:red}
The patch 3 line(s) with tabs. {color} |
| {color:green}+1{color} | {color:green} hadoopcheck {color} | {color:green} 31m 40s{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:red}-1{color} | {color:red} asflicense {color} | {color:red}  0m 12s{color} | {color:red}
The patch generated 2 ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 32m 32s{color} | {color:black}
{color} |
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|| Subsystem || Report/Notes ||
| Docker | Client=1.12.3 Server=1.12.3 Image:yetus/hbase:757bf37 |
| JIRA Issue | HBASE-7386 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12878238/HBASE-7386-master-00.patch
|
| Optional Tests |  asflicense  shellcheck  shelldocs  pylint  |
| uname | Linux 1c2618903bc3 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@2/component/dev-support/hbase-personality.sh
|
| git revision | master / bc93b66 |
| shellcheck | v0.4.6 |
| pylint | v1.7.2 |
| pylint | https://builds.apache.org/job/PreCommit-HBASE-Build/7737/artifact/patchprocess/diff-patch-pylint.txt
|
| shellcheck | https://builds.apache.org/job/PreCommit-HBASE-Build/7737/artifact/patchprocess/diff-patch-shellcheck.txt
|
| whitespace | https://builds.apache.org/job/PreCommit-HBASE-Build/7737/artifact/patchprocess/whitespace-tabs.txt
|
| asflicense | https://builds.apache.org/job/PreCommit-HBASE-Build/7737/artifact/patchprocess/patch-asflicense-problems.txt
|
| modules | C: . U: . |
| Console output | https://builds.apache.org/job/PreCommit-HBASE-Build/7737/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-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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