Sajeev Ramakrishnan created FLINK-4823:
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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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