[jira] [Created] (BEAM-13142) Ensure that the payload is consumed on Elements.Data and Elements.Timers when is_last = true

[Luke Cwik (Jira)]

Luke Cwik created BEAM-13142:
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             Summary: Ensure that the payload is consumed on Elements.Data and 
Elements.Timers when is_last = true
                 Key: BEAM-13142
                 URL: https://issues.apache.org/jira/browse/BEAM-13142
             Project: Beam
          Issue Type: Bug
          Components: sdk-go, sdk-java-harness, sdk-py-harness
            Reporter: Luke Cwik


BeamFnDataInboundObserver drops the bytes instead of passing it forward on the 
last message: 
https://github.com/apache/beam/blob/cd4b7f3b1af4f51bdab1a0b1a98f94b5288c09ec/sdks/java/fn-execution/src/main/java/org/apache/beam/sdk/fn/data/BeamFnDataInboundObserver.java#L58

data_plane.py drops the timers payload but seems to do the right thing for data:
https://github.com/apache/beam/blob/cd4b7f3b1af4f51bdab1a0b1a98f94b5288c09ec/sdks/python/apache_beam/runners/worker/data_plane.py#L343

data_mgr.go drops the data payload (timers don't seem to be supported):
https://github.com/apache/beam/blob/cd4b7f3b1af4f51bdab1a0b1a98f94b5288c09ec/sdks/go/pkg/beam/core/runtime/harness/datamgr.go#L297



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