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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14536) Balancer & SSH interfering with each other leading to unavailability
Date Sat, 10 Oct 2015 01:32:06 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14536?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14951485#comment-14951485
] 

Hadoop QA commented on HBASE-14536:
-----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12765945/HBASE-14536.v1-branch-1.patch
  against branch-1 branch at commit 2e593a9d3801a42751244ab4478650a581437875.
  ATTACHMENT ID: 12765945

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:red}-1 tests included{color}.  The patch doesn't appear to include any new or modified
tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    {color:red}-1 patch{color}.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/15940//console

This message is automatically generated.

> Balancer & SSH interfering with each other leading to unavailability
> --------------------------------------------------------------------
>
>                 Key: HBASE-14536
>                 URL: https://issues.apache.org/jira/browse/HBASE-14536
>             Project: HBase
>          Issue Type: Bug
>          Components: master, Region Assignment
>    Affects Versions: 1.1.2
>            Reporter: Devaraj Das
>            Assignee: Stephen Yuan Jiang
>             Fix For: 1.1.4
>
>         Attachments: HBASE-14536.v1-branch-1.patch, master-log.tgz
>
>
> Came across this in our cluster:
> 1. The meta was assigned to a server 10.0.0.149,16020,1443507203340
> {noformat}
> 2015-09-29 06:16:22,472 DEBUG [AM.ZK.Worker-pool2-t56] 
> master.RegionStates: Onlined 1588230740 on 
> 10.0.0.149,16020,1443507203340 {ENCODED => 1588230740, NAME => 
> 'hbase:meta,,1', STARTKEY => '', ENDKEY => ''}
> {noformat}
> 2. The server dies at some point:
> {noformat}
> 2015-09-29 06:18:25,952 INFO  [main-EventThread] 
> zookeeper.RegionServerTracker: RegionServer ephemeral node deleted, 
> processing expiration [10.0.0.149,16020,1443507203340]
> 2015-09-29 06:18:25,955 DEBUG [main-EventThread] master.AssignmentManager: based on AM,
current 
> region=hbase:meta,,1.1588230740 is on server=10.0.0.149,16020,1443507203340 server being
checked: 
> 10.0.0.149,16020,1443507203340
> {noformat}
> 3. The balancer had computed a plan that contained a move for the meta:
> {noformat}
> 2015-09-29 06:18:26,833 INFO  [B.defaultRpcServer.handler=12,queue=0,port=16000] master.HMaster:

> balance hri=hbase:meta,,1.1588230740, 
> src=10.0.0.149,16020,1443507203340, dest=10.0.0.205,16020,1443507257905
> {noformat}
> 4. The following ensues after this, leading to the meta remaining unassigned:
> {noformat}
> 2015-09-29 06:18:26,859 DEBUG [B.defaultRpcServer.handler=12,queue=0,port=16000] 
> master.AssignmentManager: Offline hbase:meta,,1.1588230740, no need to 
> unassign since it's on a dead server: 10.0.0.149,16020,1443507203340
> ......................
> 2015-09-29 06:18:26,899 INFO  [B.defaultRpcServer.handler=12,queue=0,port=16000] master.RegionStates:

> Offlined 1588230740 from 10.0.0.149,16020,1443507203340
> .....................
> 2015-09-29 06:18:26,914 INFO  [B.defaultRpcServer.handler=12,queue=0,port=16000] 
> master.AssignmentManager: Skip assigning hbase:meta,,1.1588230740, it is 
> on a dead but not processed yet server: 10.0.0.149,16020,1443507203340
> ....................
> 2015-09-29 06:18:26,915 DEBUG [AM.ZK.Worker-pool2-t58] master.AssignmentManager: Znode
hbase:meta,,1.1588230740 deleted, 
> state: {1588230740 state=OFFLINE, ts=1443507506914, 
> server=10.0.0.149,16020,1443507203340}
> ....................
> 2015-09-29 06:18:29,447 DEBUG [MASTER_META_SERVER_OPERATIONS-10.0.0.148:16000-2] master.AssignmentManager:
based on AM, current 
> region=hbase:meta,,1.1588230740 is on server=null server being checked: 
> 10.0.0.149,16020,1443507203340
> 2015-09-29 06:18:29,451 INFO  [MASTER_META_SERVER_OPERATIONS-
> 10.0.0.148:16000-2] handler.MetaServerShutdownHandler: META has been 
> assigned to otherwhere, skip assigning.
> 2015-09-29 06:18:29,452 DEBUG [MASTER_META_SERVER_OPERATIONS-10.0.0.148:16000-2] 
> master.DeadServer: Finished processing 10.0.0.149,16020,1443507203340
> {noformat}



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