codertimu commented on issue #23525:
URL: https://github.com/apache/beam/issues/23525#issuecomment-1824469999
I've stumbled upon this bug once again. To assist anyone, I'm sharing the
stack trace of the error that occurs in the dataflow console when using
PubsubIO.readMessagesWithAttributesAndMessageIdAndOrderingKey().
Beam version: 2.51.0
```java
org.apache.beam.sdk.coders.CoderException: NullableCoder expects either a
byte valued 0 (null) or 1 (present), got 50
org.apache.beam.sdk.coders.NullableCoder.decode(NullableCoder.java:90)
org.apache.beam.sdk.coders.NullableCoder.decode(NullableCoder.java:79)
org.apache.beam.sdk.io.gcp.pubsub.PubsubMessageWithAttributesAndMessageIdAndOrderingKeyCoder.decode(PubsubMessageWithAttributesAndMessageIdAndOrderingKeyCoder.java:73)
org.apache.beam.sdk.io.gcp.pubsub.PubsubMessageWithAttributesAndMessageIdAndOrderingKeyCoder.decode(PubsubMessageWithAttributesAndMessageIdAndOrderingKeyCoder.java:35)
org.apache.beam.sdk.coders.Coder.decode(Coder.java:154)
org.apache.beam.runners.dataflow.worker.PubsubReader$PubsubReaderIterator.decodeMessage(PubsubReader.java:129)
org.apache.beam.runners.dataflow.worker.WindmillReaderIteratorBase.advance(WindmillReaderIteratorBase.java:60)
org.apache.beam.runners.dataflow.worker.WindmillReaderIteratorBase.start(WindmillReaderIteratorBase.java:46)
org.apache.beam.runners.dataflow.worker.util.common.worker.ReadOperation$SynchronizedReaderIterator.start(ReadOperation.java:381)
org.apache.beam.runners.dataflow.worker.util.common.worker.ReadOperation.runReadLoop(ReadOperation.java:211)
org.apache.beam.runners.dataflow.worker.util.common.worker.ReadOperation.start(ReadOperation.java:169)
org.apache.beam.runners.dataflow.worker.util.common.worker.MapTaskExecutor.execute(MapTaskExecutor.java:83)
org.apache.beam.runners.dataflow.worker.StreamingDataflowWorker.process(StreamingDataflowWorker.java:1433)
org.apache.beam.runners.dataflow.worker.StreamingDataflowWorker.access$800(StreamingDataflowWorker.java:155)
org.apache.beam.runners.dataflow.worker.StreamingDataflowWorker$4.run(StreamingDataflowWorker.java:1056)
org.apache.beam.runners.dataflow.worker.util.BoundedQueueExecutor.lambda$executeLockHeld$0(BoundedQueueExecutor.java:163)
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
java.base/java.lang.Thread.run(Thread.java:834)
```
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