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 -- This message was sent by Atlassian JIRA (v6.3.4#6332)