[jira] [Commented] (HBASE-10833) Region assignment may fail during cluster start up

["Jimmy Xiang (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-10833?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13947225#comment-13947225 ] 

Jimmy Xiang commented on HBASE-10833:
-------------------------------------

+1

> Region assignment may fail during cluster start up
> --------------------------------------------------
>
>                 Key: HBASE-10833
>                 URL: https://issues.apache.org/jira/browse/HBASE-10833
>             Project: HBase
>          Issue Type: Bug
>          Components: Region Assignment
>            Reporter: Jeffrey Zhong
>            Assignee: Jeffrey Zhong
>         Attachments: hbase-10833.patch
>
>
> This is an intermittent & infrequent issue. It happens when a cluster is starting up, only when one region server is available for region assignment temporally and master has a transient issue to talk to the only RS 
> When the RPC layer has a hiccup to talk to a RS, the RS will be put in failed server list and it will stay in failed server list for 2 sec(default value). 
> While the 20 region retires completes much shorter than 2 secs, the end result is a failed assignment. 
> Below are the logging for the total time spent on 20 assignment retires, it only took about 36 ms for all the retries.
> {code}
> 2014-03-24 18:14:43,451 WARN  [AM.ZK.Worker-pool2-t59] master.AssignmentManager: Failed assignment of hbase:labels,,1395668310177.f7372ede6c8bd7de4e91bfeda884cffb. to hor15n18.gq1.ygridcore.net,60020,1395684489232, trying to assign elsewhere instead; try=1 of 20
> ….
> 2014-03-24 18:14:43,487 WARN  [AM.ZK.Worker-pool2-t59] master.AssignmentManager: Failed assignment of hbase:labels,,1395668310177.f7372ede6c8bd7de4e91bfeda884cffb. to hor15n18.gq1.ygridcore.net,60020,1395684489232, trying to assign elsewhere instead; try=20 of 20
> {code}



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