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https://issues.apache.org/jira/browse/HBASE-16488?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15985801#comment-15985801
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Hadoop QA commented on HBASE-16488:
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| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 0s 
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| {color:red}-1{color} | {color:red} docker {color} | {color:red} 0m 5s {color} 
| {color:red} Docker failed to build yetus/hbase:e01ee2f. {color} |
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|| Subsystem || Report/Notes ||
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12865227/HBASE-16488.v6-branch-1.patch
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| JIRA Issue | HBASE-16488 |
| Console output | 
https://builds.apache.org/job/PreCommit-HBASE-Build/6584/console |
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This message was automatically generated.



> Starting namespace and quota services in master startup asynchronizely
> ----------------------------------------------------------------------
>
>                 Key: HBASE-16488
>                 URL: https://issues.apache.org/jira/browse/HBASE-16488
>             Project: HBase
>          Issue Type: Improvement
>          Components: master
>    Affects Versions: 2.0.0, 1.3.0, 1.0.3, 1.4.0, 1.1.5, 1.2.2
>            Reporter: Stephen Yuan Jiang
>            Assignee: Stephen Yuan Jiang
>         Attachments: HBASE-16488.v1-branch-1.patch, 
> HBASE-16488.v1-master.patch, HBASE-16488.v2-branch-1.patch, 
> HBASE-16488.v2-branch-1.patch, HBASE-16488.v3-branch-1.patch, 
> HBASE-16488.v3-branch-1.patch, HBASE-16488.v4-branch-1.patch, 
> HBASE-16488.v5-branch-1.patch, HBASE-16488.v6-branch-1.patch
>
>
> From time to time, during internal IT test and from customer, we often see 
> master initialization failed due to namespace table region takes long time to 
> assign (eg. sometimes split log takes long time or hanging; or sometimes RS 
> is temporarily not available; sometimes due to some unknown assignment 
> issue).  In the past, there was some proposal to improve this situation, eg. 
> HBASE-13556 / HBASE-14190 (Assign system tables ahead of user region 
> assignment) or HBASE-13557 (Special WAL handling for system tables) or  
> HBASE-14623 (Implement dedicated WAL for system tables).  
> This JIRA proposes another way to solve this master initialization fail 
> issue: namespace service is only used by a handful operations (eg. create 
> table / namespace DDL / get namespace API / some RS group DDL).  Only quota 
> manager depends on it and quota management is off by default.  Therefore, 
> namespace service is not really needed for master to be functional.  So we 
> could start namespace service asynchronizely without blocking master startup.
>  



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