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From "stack (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4352) Apply version of hbase-4015 to branch
Date Fri, 09 Dec 2011 04:13:40 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4352?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13165828#comment-13165828
] 

stack commented on HBASE-4352:
------------------------------

Here is a 0.90.5 master trying to reload a regionserver that has been restarted as a 0.90.5
(it had been a 0.90.4):

{code}
2011-12-08 22:56:53,807 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Assigning
region TestTable,0013681953,1323325588029.5d0a564b65a53b1c86f7c02407c82231. to sv4r9s38,7003,1323384867368
2011-12-08 22:56:53,809 WARN org.apache.hadoop.ipc.HBaseClient: Unexpected exception receiving
call responses
java.lang.NullPointerException
2011-12-08 22:56:53,810 WARN org.apache.hadoop.hbase.master.AssignmentManager: Failed assignment
of TestTable,0013681953,1323325588029.5d0a564b65a53b1c86f7c02407c82231. to serverName=sv4r9s38,7003,1323384867368,
load=(requests=0, regions=0, usedHeap=23, maxHeap=493), trying to assign elsewhere instead;
retry=0
java.io.IOException: Call to /10.4.9.38:7003 failed on local exception: java.io.IOException:
Unexpected exception receiving call responses
        at org.apache.hadoop.hbase.ipc.HBaseClient.wrapException(HBaseClient.java:806)
        at org.apache.hadoop.hbase.ipc.HBaseClient.call(HBaseClient.java:775)
        at org.apache.hadoop.hbase.ipc.HBaseRPC$Invoker.invoke(HBaseRPC.java:257)
        at $Proxy7.openRegion(Unknown Source)
        at org.apache.hadoop.hbase.master.ServerManager.sendRegionOpen(ServerManager.java:561)
        at org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1043)
        at org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:858)
        at org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:838)
        at org.apache.hadoop.hbase.master.handler.ClosedRegionHandler.process(ClosedRegionHandler.java:92)
        at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:156)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:662)
Caused by: java.io.IOException: Unexpected exception receiving call responses
        at org.apache.hadoop.hbase.ipc.HBaseClient$Connection.run(HBaseClient.java:481)
Caused by: java.lang.NullPointerException
{code}

It looks like call is null as per another issue that just got committed.  Shouldn't be.

Was getting bunches of this on regionserver side, though it don't seem directly related:

{code}
2011-12-08 22:56:53,809 DEBUG org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler:
Processing open of TestTable,0013681953,1323325588029.5d0a564b65a53b1c86f7c02407c82231.
2011-12-08 22:56:53,810 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign: regionserver:7003-0x1341fa8d95400cc
Attempting to transition node 5d0a564b65a53b1c86f7c02407c82231 from M_ZK_REGION_OFFLINE to
RS_ZK_REGION_OPENING
2011-12-08 22:56:53,811 WARN org.apache.hadoop.hbase.zookeeper.ZKAssign: regionserver:7003-0x1341fa8d95400cc
Attempt to transition the unassigned node for 5d0a564b65a53b1c86f7c02407c82231 from M_ZK_REGION_OFFLINE
to RS_ZK_REGION_OPENING failed, the node existed but was version 2 not the expected version
-1
2011-12-08 22:56:53,811 WARN org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler:
Failed transition from OFFLINE to OPENING for region=5d0a564b65a53b1c86f7c02407c82231
2011-12-08 22:56:53,811 WARN org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler:
Region was hijacked? It no longer exists, encodedName=5d0a564b65a53b1c86f7c02407c82231
{code}

I was hoping to put up a 0.90.5RC.  If you want me to hold a while, I can.  Else, I'll go
ahead and cut an RC w/o this.
                
> Apply version of hbase-4015 to branch
> -------------------------------------
>
>                 Key: HBASE-4352
>                 URL: https://issues.apache.org/jira/browse/HBASE-4352
>             Project: HBase
>          Issue Type: Bug
>            Reporter: stack
>            Assignee: ramkrishna.s.vasudevan
>            Priority: Blocker
>         Attachments: HBASE-4352_0.90.patch, HBASE-4352_0.90_1.patch
>
>
> Consider adding a version of hbase-4015 to 0.90.  It changes HRegionInterface so would
need move change to end of the Interface and then test that it doesn't break rolling restart.

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