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From "Sajeev Ramakrishnan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-4823) org.apache.flink.types.NullFieldException: Field 0 is null, but expected to hold a value
Date Thu, 13 Oct 2016 11:23:21 GMT
Sajeev Ramakrishnan created FLINK-4823:
------------------------------------------

             Summary: org.apache.flink.types.NullFieldException: Field 0 is null, but expected
to hold a value
                 Key: FLINK-4823
                 URL: https://issues.apache.org/jira/browse/FLINK-4823
             Project: Flink
          Issue Type: Bug
          Components: Gelly
    Affects Versions: 1.1.0
         Environment: RHEL 6.6
            Reporter: Sajeev Ramakrishnan
            Priority: Blocker


Team,

  We are getting NULL pointer exception while doing the vertex centric graph traversal.

org.apache.flink.types.NullFieldException: Field 0 is null, but expected to hold a value.
        at org.apache.flink.api.java.typeutils.runtime.TupleSerializer.serialize(TupleSerializer.java:126)
        at org.apache.flink.api.java.typeutils.runtime.TupleSerializer.serialize(TupleSerializer.java:30)
        at org.apache.flink.runtime.plugable.SerializationDelegate.write(SerializationDelegate.java:56)
        at org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer.addRecord(SpanningRecordSerializer.java:83)
        at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:85)
        at org.apache.flink.runtime.operators.shipping.OutputCollector.collect(OutputCollector.java:65)
        at org.apache.flink.api.java.operators.JoinOperator$DefaultJoin$WrappingFlatJoinFunction.join(JoinOperator.java:572)
        at org.apache.flink.runtime.operators.JoinWithSolutionSetFirstDriver.run(JoinWithSolutionSetFirstDriver.java:196)
        at org.apache.flink.runtime.operators.BatchTask.run(BatchTask.java:486)
        at org.apache.flink.runtime.iterative.task.AbstractIterativeTask.run(AbstractIterativeTask.java:146)
        at org.apache.flink.runtime.iterative.task.IterationIntermediateTask.run(IterationIntermediateTask.java:92)
        at org.apache.flink.runtime.operators.BatchTask.invoke(BatchTask.java:351)
        at org.apache.flink.runtime.taskmanager.Task.run(Task.java:584)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
        at org.apache.flink.api.java.typeutils.runtime.TupleSerializer.serialize(TupleSerializer.java:122)
        at org.apache.flink.api.java.typeutils.runtime.TupleSerializer.serialize(TupleSerializer.java:30)
        at org.apache.flink.api.java.typeutils.runtime.TupleSerializer.serialize(TupleSerializer.java:124)
        ... 13 more

All the parameters that I am passing for the vertex and edges are not null. Not able to find
out the root cause.

Thanks & Regards,
Sajeev Ramakrishnan







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