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HBase, mail # user - forcing offline


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Re: forcing offline
Marcos Ortiz 2012-05-20, 16:55
Well, you can see this link from GBIF about HBase performance evaluation:
* http://gbif.blogspot.com/2012/02/performance-evaluation-of-hbase.html

To upgrade to 0.92.1, just install the new version, shutdown the old
cluster and start the new version of the cluster.
* Remeber to upgrade Zookeeper too, specifically to the 3.4.3 version.
* Remember to upgrade to the 0.92.1 version, you can't use a rolling
start, because the wire protocol changed in this version, so keep in
mind, that you will a downtime depending of your cluster/data size.

Regards
On 05/20/2012 12:12 PM, Ben Cuthbert wrote:
> So hbase and hadoop are running fine, but we wanted to test our application performance. So we ran some test cases for about 7 hours sending in events every 200ms to generate some load.
> After the 7 hours the application server could not connect to zookeeper, and when I checked the logs this is what I saw. So the application functions just not when we ran the test.
>
> Config is
> hadoop: 0.20.203.0
> hbase: 0.90.3
>
> So I am just trying to upgrade to
>
> hadoop: 1.0.3
> hbase: 0.92.1
>
> Then going to run the same test again.
>
>
> On 20 May 2012, at 16:56, Ben Cuthbert wrote:
>
>> I will try again as I did not run that. I just saw this error when trying to use hbase-explorer to connect.
>>
>>
>> On 20 May 2012, at 16:02, Michael Segel wrote:
>>
>>> What did you see when you ran the HBase shell's status?
>>> Did you run status w higher details?
>>> (see status help)
>>>
>>>
>>> On May 20, 2012, at 2:12 AM, Ben Cuthbert wrote:
>>>
>>>> All
>>>>
>>>> We run a load test and after about 3 hours our application stopped. Check the logs I see this in the hbase-master log
>>>>
>>>> 2012-05-20 08:08:17,251 INFO org.apache.hadoop.hbase.master.AssignmentManager: Region has been OFFLINE for too long, reassigning -ROOT-,,0.70236052 to a random server
>>>> 2012-05-20 08:08:17,252 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Forcing OFFLINE; was=.META.,,1.1028785192 state=OFFLINE, ts=1337497517243
>>>> 2012-05-20 08:08:17,252 DEBUG org.apache.hadoop.hbase.master.AssignmentManager: Forcing OFFLINE; was=-ROOT-,,0.70236052 state=OFFLINE, ts=1337497517243
>>>> 2012-05-20 08:10:10,309 INFO org.apache.zookeeper.server.NIOServerCnxn: Accepted socket connection from /0:0:0:0:0:0:0:1%0:62747
>>>> 2012-05-20 08:10:10,315 INFO org.apache.zookeeper.server.NIOServerCnxn: Client attempting to establish new session at /0:0:0:0:0:0:0:1%0:62747
>>>> 2012-05-20 08:10:10,316 INFO org.apache.zookeeper.server.NIOServerCnxn: Established session 0x137653a0e8e02fa with negotiated timeout 40000 for client /0:0:0:0:0:0:0:1%0:62747
>>>> 2012-05-20 08:10:10,316 INFO org.apache.zookeeper.server.PrepRequestProcessor: Got user-level KeeperException when processing sessionid:0x137653a0e8e02fa type:create cxid:0x1 zxid:0xfffffffffffffffe txntype:unknown reqpath:n/a Error Path:/hbase Error:KeeperErrorCode = NodeExists for /hbase
>>>> 2012-05-20 08:10:10,329 INFO org.apache.zookeeper.server.PrepRequestProcessor: Got user-level KeeperException when processing sessionid:0x137653a0e8e02fa type:create cxid:0x2 zxid:0xfffffffffffffffe txntype:unknown reqpath:n/a Error Path:/hbase/unassigned Error:KeeperErrorCode = NodeExists for /hbase/unassigned
>>>> 2012-05-20 08:10:10,329 INFO org.apache.zookeeper.server.PrepRequestProcessor: Got user-level KeeperException when processing sessionid:0x137653a0e8e02fa type:create cxid:0x3 zxid:0xfffffffffffffffe txntype:unknown reqpath:n/a Error Path:/hbase/rs Error:KeeperErrorCode = NodeExists for /hbase/rs
>>>> 2012-05-20 08:10:10,330 INFO org.apache.zookeeper.server.PrepRequestProcessor: Got user-level KeeperException when processing sessionid:0x137653a0e8e02fa type:create cxid:0x4 zxid:0xfffffffffffffffe txntype:unknown reqpath:n/a Error Path:/hbase/table Error:KeeperErrorCode = NodeExists for /hbase/table
>>>>
>>>>
>>>> Hadoop seems to be up and running.
>>>>
>>>> last log in the datanode is
>>>>
>>>> 12/05/20 06:15:25 INFO datanode.DataBlockScanner: Verification succeeded for blk_-3639294708473848144_3329

Marcos Luis Ort�z Valmaseda
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