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
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 ?
> On Tue, Jul 23, 2013 at 12:26 PM, arun sirimalla <[EMAIL PROTECTED]
> > 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
> > node and i notice below error on failed tasks. Out of 12 tasktrackers,
> > tasktracker can connect to HBase and insert the data. Class path is set
> > 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
> > at
> > at
> > ... 14 more
> > Caused by: java.lang.ClassNotFoundException:
> > org.apache.hadoop.hbase.MasterNotRunningException
> > at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
> > Thanks
> > Arun