Details
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Bug
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Status: Open
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P3
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Resolution: Unresolved
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2.7.0
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None
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None
Description
Receive this exception when using a DoFn containing an EVENT_TIME timer and passing a side input. Pipeline processing aborts. It works as expected when the side input is absent.
2018-11-06-12:03:32 ERROR o.a.b.r.direct.QuiescenceDriver - Internal Error while delivering timers java.lang.IllegalArgumentException: expected one element but was: <TestExpiry/TestingExpiry/ParMultiDo(TestExpiry)/To KeyedWorkItem/ParMultiDo(ToKeyedWorkItem).output [PCollection], TestExpiry/View.AsList/View.VoidKeyToMultimapMaterialization/ParDo(VoidKeyToMultimapMaterialization)/ParMultiDo(VoidKeyToMultimapMaterialization).output [PCollection]> at org.apache.beam.repackaged.beam_runners_direct_java.com.google.common.collect.Iterators.getOnlyElement(Iterators.java:322) at org.apache.beam.repackaged.beam_runners_direct_java.com.google.common.collect.Iterables.getOnlyElement(Iterables.java:294) at org.apache.beam.runners.direct.QuiescenceDriver.fireTimers(QuiescenceDriver.java:167) at org.apache.beam.runners.direct.QuiescenceDriver.drive(QuiescenceDriver.java:110) at org.apache.beam.runners.direct.ExecutorServiceParallelExecutor$2.run(ExecutorServiceParallelExecutor.java:170) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) 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)