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Pig, mail # user - UDFContext NULL JobConf


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Re: UDFContext NULL JobConf
Henning Kropp 2013-10-31, 07:49
Sure, just did https://issues.apache.org/jira/browse/PIG-3554

Kind regards
2013/10/30 Cheolsoo Park <[EMAIL PROTECTED]>

> Indeed. Do you mind filing a jira?
> https://issues.apache.org/jira/browse/PIG
>
>
> On Wed, Oct 30, 2013 at 11:34 AM, Henning Kropp <[EMAIL PROTECTED]
> >wrote:
>
> > Wow, I was pretty sure to have tested it, but apparently not. The reason
> > for the NPE seems to be the @MonitoredUDF
> >
> > You can reproduced it with the following code:
> >
> > import java.io.IOException;
> > import java.util.concurrent.TimeUnit;
> > import org.apache.hadoop.conf.Configuration;
> > import org.apache.pig.EvalFunc;
> > import org.apache.pig.builtin.MonitoredUDF;
> > import org.apache.pig.data.Tuple;
> > import org.apache.pig.impl.util.UDFContext;
> >
> > @MonitoredUDF(timeUnit = TimeUnit.HOURS, duration = 3, intDefault = 1)
> > public class TestJobConf extends EvalFunc<Tuple> {
> >
> >     public TestJobConf() {
> >     }
> >
> >     @Override
> >     public Tuple exec(Tuple tuple) throws IOException {
> >         if (tuple == null || tuple.size() == 0) {
> >             return null;
> >         }
> >         Configuration jobConf;
> >         jobConf = UDFContext.getUDFContext().getJobConf();
> >         System.err.println(jobConf.toString());
> >         return null;
> >     }
> >
> > }
> >
> > Log from the Task:
> >
> > 2013-10-30 19:24:09,516 ERROR TestJobConf:
> > java.util.concurrent.ExecutionException:
> > java.lang.NullPointerException
> > 2013-10-30 19:24:10,388 ERROR TestJobConf:
> > java.util.concurrent.ExecutionException:
> > java.lang.NullPointerException
> > 2013-10-30 19:24:10,880 ERROR TestJobConf:
> > java.util.concurrent.ExecutionException:
> > java.lang.NullPointerException
> > 2013-10-30 19:24:11,512 ERROR TestJobConf:
> > java.util.concurrent.ExecutionException:
> > java.lang.NullPointerException
> > 2013-10-30 19:24:12,264 ERROR TestJobConf:
> > java.util.concurrent.ExecutionException:
> > java.lang.NullPointerException
> >
> >
> > Without the MonitoredUDF Annotation the log output is:
> >
> > Configuration: core-default.xml, core-site.xml, mapred-default.xml,
> > mapred-site.xml, hdfs-default.xml, hdfs-site.xml, .....
> >
> > Seems like a bug.
> >
> >
> > 2013/10/30 Pradeep Gollakota <[EMAIL PROTECTED]>
> >
> > > Are you able to post your UDF (or at least a sanitized version)?
> > >
> > >
> > > On Wed, Oct 30, 2013 at 10:46 AM, Henning Kropp <
> [EMAIL PROTECTED]
> > > >wrote:
> > >
> > > > Hi,
> > > >
> > > > thanks for your reply. I read about the expected behavior on the
> > > front-end
> > > > and I am getting the NPE on the back-end. The Mappers log the
> Exception
> > > > during Execution.
> > > >
> > > > I am currently digging through debug messages. What to look out for?
> > > There
> > > > are bunch of
> > > >
> > > > [main] DEBUG org.apache.hadoop.conf.Configuration  -
> > java.io.IOException:
> > > > config()
> > > >
> > > > log messages. But I recall them as being "normal" for reasons I don't
> > > > remember.
> > > >
> > > > Regards
> > > >
> > > >
> > > > 2013/10/30 Cheolsoo Park <[EMAIL PROTECTED]>
> > > >
> > > > > Hi,
> > > > >
> > > > > Are you getting NPE on the front-end or the back-end? Sounds like
> > > jobConf
> > > > > is not added to UDFContext, which is expected on the front-end.
> > Please
> > > > see
> > > > > the comments in getJobConf() and addJobConf() in the source code:
> > > > >
> > > > >
> > > > >
> > > >
> > >
> >
> https://svn.apache.org/repos/asf/pig/trunk/src/org/apache/pig/impl/util/UDFContext.java
> > > > >
> > > > > Thanks,
> > > > > Cheolsoo
> > > > >
> > > > >
> > > > > On Wed, Oct 30, 2013 at 9:57 AM, Henning Kropp <
> > > [EMAIL PROTECTED]
> > > > > >wrote:
> > > > >
> > > > > > Hi,
> > > > > >
> > > > > > I am stuck. In my UDF (Java) extends EvalFunc the following code
> > > throws
> > > > > and
> > > > > > NPE in exec(), when executed in -x mapred mode:
> > > > > >
> > > > > > Configuration jobConf = UDFContext.getUDFContext().getJobConf();