In HbaseObjectWritable#readObject(), we have:
if(Writable.class.isAssignableFrom(instanceClass)){
Writable writable = WritableFactories.newInstance(instanceClass,
conf);
try {
writable.readFields(in);
Vikram:
Please double check your VO class w.r.t. Writable implementation
Cheers
On Tue, May 27, 2014 at 11:11 AM, Anoop John <[email protected]> wrote:
> I have not done doing some thing like this. But I think making the VO as
> writable is not enough.
> You have to add the new VO class entry into HbaseObjectWritable. (Yes u
> have to touch the hbase code)
> You can see that all the Writable classes, which client send to server, is
> added into this class Maps.
> We have *CODE_TO_CLASS and **CLASS_TO_CODE Mappings here in
> *HbaseObjectWritable.
> Just try reading this class.
>
> -Anoop-
>
> On Tue, May 27, 2014 at 11:23 PM, Vladimir Rodionov <
> [email protected]
> > wrote:
>
> > Make sure that your Writable implementation code is correct. Do you have
> > any unit tests for your Writable implementation?
> >
> > Best regards,
> > Vladimir Rodionov
> > Principal Platform Engineer
> > Carrier IQ, www.carrieriq.com
> > e-mail: [email protected]
> >
> > ________________________________________
> > From: Vikram Singh Chandel [[email protected]]
> > Sent: Tuesday, May 27, 2014 10:46 AM
> > To: [email protected]
> > Subject: Re: How to pass a POJO as a parameter to Coprocessor Getting
> > Exception Error in Read Fields
> >
> > Hi Ted
> >
> > Yes you were right
> > The CDH version is 4.5 and HBase version is 0.94.6
> >
> > Tom
> >
> > full stack trace of log as (displayed on console) is
> >
> > at
> > java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:252)
> > at java.util.concurrent.FutureTask.get(FutureTask.java:111)
> > at
> >
> >
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.processExecs(HConnectionManager.java:1501)
> > at
> > org.apache.hadoop.hbase.client.HTable.coprocessorExec(HTable.java:1294)
> > at
> > org.apache.hadoop.hbase.client.HTable.coprocessorExec(HTable.java:1274)
> > * at com.thomsonreuters.hbase.**ScanAllEnpoint.main(*
> > *ScanAllEnpoint.java:30) -- Client class (calling CoProcessorExec method
> > here)*
> >
> >
> >
> > Tue May 27 12:04:05 UTC 2014,
> > org.apache.hadoop.hbase.ipc.ExecRPCInvoker$1@1c459fc2,
> > java.io.IOException:
> > IPC server unable to read call parameters: Error in readFields
> >
> >
> > *This repeats for 10 Times*
> >
> >
> > at
> >
> >
> org.apache.hadoop.hbase.client.ServerCallable.withRetries(ServerCallable.java:186)
> > at
> > org.apache.hadoop.hbase.ipc.ExecRPCInvoker.invoke(ExecRPCInvoker.java:79)
> > at com.sun.proxy.$Proxy8.getResults(Unknown Source)
> > * at com.thomsonreuters.hbase.**ScanAllEnpoint$1.call(*
> > *ScanAllEnpoint.java:35) -- Client Class*
> > * at com.thomsonreuters.hbase.**ScanAllEnpoint$1.call(*
> > *ScanAllEnpoint.java:1) -- Client Class*
> > at
> >
> >
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation$4.call(HConnectionManager.java:1489)
> > at
> > java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
> > at java.util.concurrent.FutureTask.run(FutureTask.java:166)
> > at
> >
> >
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> > at
> >
> >
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> > at java.lang.Thread.run(Thread.java:722)
> >
> >
> >
> >
> >
> >
> > On Tue, May 27, 2014 at 10:45 PM, Tom Brown <[email protected]>
> wrote:
> >
> > > Sorry, accidentally hit send... I meant to suggest this:
> > >
> > >
> > >
> >
> http://stackoverflow.com/questions/20257356/hbase-client-scan-could-not-initialize-org-apache-hadoop-hbase-util-classes/
> > >
> > > --Tom
> > >
> > >
> > > On Tue, May 27, 2014 at 11:14 AM, Tom Brown <[email protected]>
> > wrote:
> > >
> > > > Can you check your server logs for a full stack trace? This sounds
> like
> > > it
> > > > could be similar to this:
> > > >
> > > >
> > > >
> > > > On Tue, May 27, 2014 at 10:15 AM, Ted Yu <[email protected]>
> wrote:
> > > >
> > > >> Can you confirm the version of HBase ?
> > > >>
> > > >> To my knowledge, cdh5 is based on 0.96
> > > >>
> > > >> Cheers
> > > >>
> > > >>
> > > >> On Tue, May 27, 2014 at 1:36 AM, Vikram Singh Chandel <
> > > >> [email protected]> wrote:
> > > >>
> > > >> > Hi
> > > >> >
> > > >> > I am trying to pass a POJO (RequestVO say) having a single member
> > > >> variable
> > > >> > i.e
> > > >> > *Text Name; *to coprocessorExec method.
> > > >> >
> > > >> > This VO implements writable
> > > >> >
> > > >> > But getting following exception
> > > >> >
> > > >> > org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed
> > after
> > > >> > attempts=10,
> > > >> >
> > > >> > *exceptions:*
> > > >> > Tue May 27 13:42:41 IST 2014,
> > > >> > *org.apache.hadoop.hbase.ipc.ExecRPCInvoker$1@1506a1e,
> > > >> > java.io.IOException: IPC server unable to read call parameters:
> > Error
> > > in
> > > >> > readFields *
> > > >> >
> > > >> > *HBase v :* 0.94.6 Cloudera (CDH 5 Distribution)
> > > >> > *Hadoop :* 2.2.0
> > > >> >
> > > >> >
> > > >> >
> > > >> >
> > > >> >
> > > >> > --
> > > >> > *Regards*
> > > >> >
> > > >> > *VIKRAM SINGH CHANDEL*
> > > >> >
> > > >> > Please do not print this email unless it is absolutely
> > > necessary,Reduce.
> > > >> > Reuse. Recycle. Save our planet.
> > > >> >
> > > >>
> > > >
> > > >
> > >
> >
> >
> >
> > --
> > *Regards*
> >
> > *VIKRAM SINGH CHANDEL*
> >
> > Please do not print this email unless it is absolutely necessary,Reduce.
> > Reuse. Recycle. Save our planet.
> >
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