[GitHub] [beam] damccorm opened a new issue, #20320: BeamUncollectRel UncollectDoFn NullPointerException

[GitBox <gi...@apache.org>]

damccorm opened a new issue, #20320:
URL: https://github.com/apache/beam/issues/20320

   two failures in shard 19
   ```
   
   org.apache.beam.sdk.Pipeline$PipelineExecutionException: java.lang.NullPointerException
   	at org.apache.beam.runners.direct.DirectRunner$DirectPipelineResult.waitUntilFinish(DirectRunner.java:348)
   	at
   org.apache.beam.runners.direct.DirectRunner$DirectPipelineResult.waitUntilFinish(DirectRunner.java:318)
   	at
   org.apache.beam.runners.direct.DirectRunner.run(DirectRunner.java:213)
   	at org.apache.beam.runners.direct.DirectRunner.run(DirectRunner.java:67)
   	at
   org.apache.beam.sdk.Pipeline.run(Pipeline.java:317)
   	at org.apache.beam.sdk.Pipeline.run(Pipeline.java:303)
   	at
   org.apache.beam.sdk.extensions.sql.impl.rel.BeamEnumerableConverter.runCollector(BeamEnumerableConverter.java:201)
   	at
   org.apache.beam.sdk.extensions.sql.impl.rel.BeamEnumerableConverter.collectRows(BeamEnumerableConverter.java:218)
   	at
   org.apache.beam.sdk.extensions.sql.impl.rel.BeamEnumerableConverter.toRowList(BeamEnumerableConverter.java:150)
   	at
   org.apache.beam.sdk.extensions.sql.impl.rel.BeamEnumerableConverter.toRowList(BeamEnumerableConverter.java:127)
   	at
   cloud.dataflow.sql.ExecuteQueryServiceServer$SqlComplianceServiceImpl.executeQuery(ExecuteQueryServiceServer.java:329)
   	at
   com.google.zetasql.testing.SqlComplianceServiceGrpc$MethodHandlers.invoke(SqlComplianceServiceGrpc.java:423)
   	at
   com.google.zetasql.io.grpc.stub.ServerCalls$UnaryServerCallHandler$UnaryServerCallListener.onHalfClose(ServerCalls.java:171)
   	at
   com.google.zetasql.io.grpc.internal.ServerCallImpl$ServerStreamListenerImpl.halfClosed(ServerCallImpl.java:283)
   	at
   com.google.zetasql.io.grpc.internal.ServerImpl$JumpToApplicationThreadServerStreamListener$1HalfClosed.runInContext(ServerImpl.java:711)
   	at
   com.google.zetasql.io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
   	at com.google.zetasql.io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:123)
   	at
   java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
   	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   	at
   java.lang.Thread.run(Thread.java:748)
   Caused by: java.lang.NullPointerException
   	at org.apache.beam.sdk.extensions.sql.impl.rel.BeamUncollectRel$UncollectDoFn.process(BeamUncollectRel.java:103)
   
   ```
   
   ```
   
   Apr 01, 2020 5:58:27 PM cloud.dataflow.sql.ExecuteQueryServiceServer$SqlComplianceServiceImpl executeQuery
   INFO:
   Processing Sql statement: SELECT e FROM UNNEST(CAST(NULL AS ARRAY<INT64>)) e
   Apr 01, 2020 5:58:27 PM
   cloud.dataflow.sql.ExecuteQueryServiceServer$SqlComplianceServiceImpl executeQuery
   INFO: Processing
   Sql statement: SELECT e FROM UNNEST(CAST(NULL AS ARRAY<STRUCT<INT64>>)) e
   
   ```
   
   
   Imported from Jira [BEAM-9698](https://issues.apache.org/jira/browse/BEAM-9698). Original Jira may contain additional context.
   Reported by: apilloud.


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