damccorm opened a new issue, #20936:
URL: https://github.com/apache/beam/issues/20936

   When Reading from BigQueryIO using DIRECT_READ getting 
   ```
   
   ~ Channel ManagedChannelImpl{logId=1, 
target=bigquerystorage.googleapis.com:443} was not shutdown properly!!!
   ~ Make sure to call shutdown()/shutdownNow() and wait until 
awaitTermination() returns true. 
   ```
   
   ```
   
   2021-05-12 13:25:49.319 CEST Error message from worker:
   java.lang.NullPointerException
   
org.apache.beam.sdk.io.gcp.bigquery.BigQueryStorageSourceBase.split(BigQueryStorageSourceBase.java:105)
   
org.apache.beam.sdk.io.gcp.bigquery.BigQueryStorageTableSource.split(BigQueryStorageTableSource.java:40)
   
org.apache.beam.runners.dataflow.worker.WorkerCustomSources.splitAndValidate(WorkerCustomSources.java:294)
   
org.apache.beam.runners.dataflow.worker.WorkerCustomSources.performSplitTyped(WorkerCustomSources.java:216)
   
org.apache.beam.runners.dataflow.worker.WorkerCustomSources.performSplitWithApiLimit(WorkerCustomSources.java:200)
   
org.apache.beam.runners.dataflow.worker.WorkerCustomSources.performSplit(WorkerCustomSources.java:179)
   
org.apache.beam.runners.dataflow.worker.WorkerCustomSourceOperationExecutor.execute(WorkerCustomSourceOperationExecutor.java:82)
   
org.apache.beam.runners.dataflow.worker.BatchDataflowWorker.executeWork(BatchDataflowWorker.java:420)
   
org.apache.beam.runners.dataflow.worker.BatchDataflowWorker.doWork(BatchDataflowWorker.java:389)
   
org.apache.beam.runners.dataflow.worker.BatchDataflowWorker.getAndPerformWork(BatchDataflowWorker.java:314)
   
org.apache.beam.runners.dataflow.worker.DataflowBatchWorkerHarness$WorkerThread.doWork(DataflowBatchWorkerHarness.java:140)
   
org.apache.beam.runners.dataflow.worker.DataflowBatchWorkerHarness$WorkerThread.call(DataflowBatchWorkerHarness.java:120)
   
org.apache.beam.runners.dataflow.worker.DataflowBatchWorkerHarness$WorkerThread.call(DataflowBatchWorkerHarness.java:107)
   java.util.concurrent.FutureTask.run(FutureTask.java:266)
   
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
   
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   java.lang.Thread.run(Thread.java:748)
   
   ```
   
   Sbt/Scala minimal example to reproduce 
[https://github.com/fpopic/BEAM-12359](https://github.com/fpopic/BEAM-12359) 
(if required can try to make it in Java).
   
   Relates to user mailing list 
[question](https://lists.apache.org/x/thread.html/r705ca8f0ea9517f148637be59e509ce80fa75b22c98ad63acd551065@%3Cuser.beam.apache.org%3E).
   
   Imported from Jira 
[BEAM-12359](https://issues.apache.org/jira/browse/BEAM-12359). Original Jira 
may contain additional context.
   Reported by: fpopic.


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