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HBase >> mail # user >> Root Region is not online


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charan raj 2013-03-01, 08:33
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Leonid Fedotov 2013-03-01, 18:00
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Re: Root Region is not online
Hi Charan,

Its may be because of some zookeeper issues (like session timeout) while
splitting hlog.
The problem could be https://issues.apache.org/jira/browse/HBASE-7034
Its recently fixed in 0.94 version as well.

Thanks,
Rajesh
On Fri, Mar 1, 2013 at 2:03 PM, charan raj <[EMAIL PROTECTED]> wrote:

> hi,
>
>  I am currently using a 5 node cluster configured in amazon.The namenode
> and secondary namenode or in different node. I have shut down the cluster
> in amazon instance directly without shuting down hbase and hadoop,But when
> i started the amazon instance, here is the problem am facing with hbase am
> not able to scan the data present in hbase table and below are the error
> that is generated with hbck,masterlog and zookeeper log.
>
>          hbase/logs masterlog
> ==================>  error while splitting logs in
>
> [hdfs://servername:9000/hbase/.logs/servername,60020,1358343873518-splitting,
>
> hdfs://servername:9000/hbase/.logs/servername,60020,1361892283588-splitting,
>
> hdfs://servername:9000/hbase/.logs/servername,60020,1358343874434-splitting,
>
> hdfs://servername:9000/hbase/.logs/servername,60020,1361892283510-splitting,
>
> hdfs://servername:9000/hbase/.logs/servername,60020,1358343873830-splitting,
>
> hdfs://servername:9000/hbase/.logs/servername,60020,1361892283643-splitting]
> installed = 1 but only 0 done
>  Task = installed = 1 done = 0 error = 1
>         at
>
> org.apache.hadoop.hbase.master.SplitLogManager.splitLogDistributed(SplitLogManager.java:268)
>         at
>
> org.apache.hadoop.hbase.master.MasterFileSystem.splitLog(MasterFileSystem.java:279)
>         at
>
> org.apache.hadoop.hbase.master.MasterFileSystem.splitLogAfterStartup(MasterFileSystem.java:219)
>         at
>
> org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:497)
>         at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:336)
>         at java.lang.Thread.run(Thread.java:722)
>
> hbase/logs zookeeper log
> ========================> 2013-03-01 07:12:53,000 INFO
> org.apache.zookeeper.server.PrepRequestProcessor: Got user-level
> KeeperException when processing sessionid:0x13d214fae680005 type:setData
> cxid:0x1c6f zxid:0x49ac txntype:-1 reqpath:n/a Error
>
> Path:/hbase/splitlog/hdfs%3A%2F%2Fservername%3A9000%2Fhbase%2F.logs%2Fservername%2C60020%2C1358343873830-splitting%2Fservername%252C60020%252C1358343873830.1360329708655
> Error:KeeperErrorCode = BadVersion for
>
> /hbase/splitlog/hdfs%3A%2F%2Fservername%3A9000%2Fhbase%2F.logs%2Fservername%2C60020%2C1358343873830-splitting%2Fservername%252C60020%252C1358343873830.1360329708655
>
> bin/hbase hbck error
> ==================> Version: 0.92.1
> 13/03/01 07:15:17 DEBUG
> client.HConnectionManager$HConnectionImplementation: Lookedup root region
> location,
>
> connection=org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@58c9defc
> ;
> serverName> ERROR: Root Region or some of its attributes are null.
> ERROR: Encountered fatal error. Exiting...
>
>
>
> I tried hbck -fix and other options which will repair meta but it is of no
> use,can any one help me in solving this issue...........
>
> Regards,
> Charan
>
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Leonid Fedotov 2013-03-08, 22:19