[jira] [Created] (BEAM-9947) Timer coder contains a faulty key coder leading to a corrupted encoding

["Maximilian Michels (Jira)" <ji...@apache.org>]

Maximilian Michels created BEAM-9947:
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             Summary: Timer coder contains a faulty key coder leading to a corrupted encoding
                 Key: BEAM-9947
                 URL: https://issues.apache.org/jira/browse/BEAM-9947
             Project: Beam
          Issue Type: Bug
          Components: java-fn-execution, sdk-py-core
            Reporter: Maximilian Michels
            Assignee: Maximilian Michels
             Fix For: 2.21.0


The coder for timers contains a key coder which may have to be length-prefixed in case of a non-standard coders. We noticed that this was not reflected in the
ProcessBundleDescriptor leading to errors like this one for non-standard coders, e.g. Python's {{FastPrimitivesCoder}}:

{noformat}
Caused by: org.apache.beam.sdk.coders.CoderException: java.io.EOFException: reached end of stream after reading 36 bytes; 68 bytes expected
	at org.apache.beam.sdk.coders.StringUtf8Coder.decode(StringUtf8Coder.java:104)
	at org.apache.beam.sdk.coders.StringUtf8Coder.decode(StringUtf8Coder.java:90)
	at org.apache.beam.runners.core.construction.Timer$Coder.decode(Timer.java:194)
	at org.apache.beam.runners.core.construction.Timer$Coder.decode(Timer.java:157)
	at org.apache.beam.sdk.fn.data.BeamFnDataInboundObserver.accept(BeamFnDataInboundObserver.java:81)
	at org.apache.beam.sdk.fn.data.BeamFnDataInboundObserver.accept(BeamFnDataInboundObserver.java:31)
	at org.apache.beam.sdk.fn.data.BeamFnDataGrpcMultiplexer$InboundObserver.onNext(BeamFnDataGrpcMultiplexer.java:180)
	at org.apache.beam.sdk.fn.data.BeamFnDataGrpcMultiplexer$InboundObserver.onNext(BeamFnDataGrpcMultiplexer.java:127)
	at org.apache.beam.vendor.grpc.v1p26p0.io.grpc.stub.ServerCalls$StreamingServerCallHandler$StreamingServerCallListener.onMessage(ServerCalls.java:251)
	at org.apache.beam.vendor.grpc.v1p26p0.io.grpc.ForwardingServerCallListener.onMessage(ForwardingServerCallListener.java:33)
	at org.apache.beam.vendor.grpc.v1p26p0.io.grpc.Contexts$ContextualizedServerCallListener.onMessage(Contexts.java:76)
	at org.apache.beam.vendor.grpc.v1p26p0.io.grpc.internal.ServerCallImpl$ServerStreamListenerImpl.messagesAvailableInternal(ServerCallImpl.java:309)
	at org.apache.beam.vendor.grpc.v1p26p0.io.grpc.internal.ServerCallImpl$ServerStreamListenerImpl.messagesAvailable(ServerCallImpl.java:292)
	at org.apache.beam.vendor.grpc.v1p26p0.io.grpc.internal.ServerImpl$JumpToApplicationThreadServerStreamListener$1MessagesAvailable.runInContext(ServerImpl.java:782)
	at org.apache.beam.vendor.grpc.v1p26p0.io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
	at org.apache.beam.vendor.grpc.v1p26p0.io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:123)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	... 1 more
{noformat}




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