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https://issues.apache.org/jira/browse/BEAM-13193?focusedWorklogId=685452&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-685452
 ]

ASF GitHub Bot logged work on BEAM-13193:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 23/Nov/21 18:31
            Start Date: 23/Nov/21 18:31
    Worklog Time Spent: 10m 
      Work Description: lukecwik commented on a change in pull request #16051:
URL: https://github.com/apache/beam/pull/16051#discussion_r755405431



##########
File path: 
sdks/java/harness/src/main/java/org/apache/beam/fn/harness/control/ProcessBundleHandler.java
##########
@@ -458,7 +458,10 @@ public BundleFinalizer getBundleFinalizer() {
             startFunction.run();
           }
 
-          if 
(!bundleProcessor.getInboundEndpointApiServiceDescriptors().isEmpty()) {
+          if (request.getProcessBundle().hasElements()) {
+            
bundleProcessor.getInboundObserver().accept(request.getProcessBundle().getElements());
+            bundleProcessor.getInboundObserver().awaitCompletion();

Review comment:
       This will block forever if the elements message is malformed and doesn't 
contain "terminal" elements so it would be better to handle this case 
explicitly within the BeamFnDataInboundObserver2 as a separate method.
   
   Also passing it through the queue within BeamFnDataInboundObserver2 and 
adding the additional synchronization seems wasteful.




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Issue Time Tracking
-------------------

    Worklog Id:     (was: 685452)
    Time Spent: 7.5h  (was: 7h 20m)

> Optional data embedding in Fn API control request and response
> --------------------------------------------------------------
>
>                 Key: BEAM-13193
>                 URL: https://issues.apache.org/jira/browse/BEAM-13193
>             Project: Beam
>          Issue Type: New Feature
>          Components: sdk-java-harness, sdk-py-harness
>            Reporter: Yichi Zhang
>            Priority: P2
>          Time Spent: 7.5h
>  Remaining Estimate: 0h
>
> https://docs.google.com/document/d/14p8Y_n4IY5n9L_I9l5x9lVGgml4ZzdCw645HldndCrw/edit



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