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HBase >> mail # user >> HBase master not starting up


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Kasturi 2012-06-28, 18:26
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Re: HBase master not starting up
Sounds like your .Meta. table is corrupted.

Thought that was fixed in 90.4...

On Jun 28, 2012, at 1:26 PM, Kasturi wrote:

> Hi,
> I have HBase master running on 3 nodes and region server on 4 other nodes on a
> Mapr hadoop cluster. We have been using it for a while, and it was working fine.
> Yesterday, we had a disk crash on one of the masters. There were some further
> issues and we had to delete the Hbase logs. Now, I am trying to restart the
> Hbase master, which is in a stale state, but receiving the followign message:
>
> FATAL org.apache.hadoop.hbase.master.HMaster: Unhandled exception. Starting
> shutdown.
> java.lang.NullPointerException
>        at
> org.apache.hadoop.hbase.master.
> AssignmentManager.regionOnline(AssignmentManager.java:707)
>        at
> org.apache.hadoop.hbase.master.
> AssignmentManager.processFailover(AssignmentManager.java:216)
>        at
> org.apache.hadoop.hbase.master.
> HMaster.finishInitialization(HMaster.java:401)
>
>        at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:282)
> 2012-06-27 14:29:47,615 INFO org.apache.hadoop.hbase.master.HMaster: Aborting
>
> We are using Hbase version 0.90.4.
>
> Btw, after the disk crash, the application
> using the HBase cluster was
> complaining with the following message:
>
> java.io.IOException: HRegionInfo was null or empty in .META.,
> row=keyvalues={urls,http://www.blocked-website.com/main?wc=GQtuEwt%2FaxpHDQpyAgsdEB8WURUA&
> .......
>
> Can I recover HBase from this state without
> losing the data? I am pretty new to
> the HBase setups. Please advise.
>
>
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Stack 2012-06-28, 21:50
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Kasturi 2012-06-29, 17:53
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Stack 2012-06-29, 17:57