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HBase, mail # user - HBase Master not running Exception


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Re: HBase Master not running Exception
Ted Yu 2013-07-23, 20:36
More information from the developer would help.

Also take a look at TableMapReduceUtil#initTableReducerJob() and how it is
used in 0.94 code base.

Cheers

On Tue, Jul 23, 2013 at 12:50 PM, arun sirimalla <[EMAIL PROTECTED]>wrote:

> I am using HBase 94.6, i am not pretty sure about how we intialize
> reducers. I can ask my developer regarding that.
> Is there any other issue that can cause reduce task not connecting to
> HBase? I Set only 1 reducer to this job, it succeeds only if that reducer
> task is assigned to one of the tasktracker  as mentioned in my previous
> email.
>
>
> On Tue, Jul 23, 2013 at 12:32 PM, Ted Yu <[EMAIL PROTECTED]> wrote:
>
> > Which HBase release are you using ?
> >
> > Mind showing us how you initialize the reduce tasks ?
> >
> > Cheers
> >
> > On Tue, Jul 23, 2013 at 12:26 PM, arun sirimalla <[EMAIL PROTECTED]
> > >wrote:
> >
> > > I am running mapreduce job to insert the data into HBase, Map phase is
> > > running fine, but when the reducer starts it fails on all nodes except
> > one
> > > node and i notice below error on failed tasks. Out of 12 tasktrackers,
> > one
> > > tasktracker can connect to HBase and insert the data. Class path is set
> > on
> > > all nodes, but unable to figure out whats the root cause.  No issues
> with
> > > HBase, i can scan the tables.
> > >
> > > Caused by: java.lang.NoClassDefFoundError:
> > > org/apache/hadoop/hbase/MasterNotRunningException
> > >         at
> > >
> >
> com.netapp.asupdata.configloader.hbase.HbaseConnectionManager.initializeAllConnections(HbaseConnectionManager.java:161)
> > >         at
> > >
> >
> com.netapp.asupdata.configloader.mapreduce.AbstractLoaderReducer.configure(AbstractLoaderReducer.java:112)
> > >         at
> > >
> >
> com.netapp.asupdata.configloader.mapreduce.BackfillLoaderReducer.configure(BackfillLoaderReducer.java:20)
> > >         ... 14 more
> > > Caused by: java.lang.ClassNotFoundException:
> > > org.apache.hadoop.hbase.MasterNotRunningException
> > >         at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
> > >
> > > Thanks
> > > Arun
> > >
> >
>