Boyuan Zhang created BEAM-10231:
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             Summary: Connecting data channel blocks getting 
ProcessBundleResponse
                 Key: BEAM-10231
                 URL: https://issues.apache.org/jira/browse/BEAM-10231
             Project: Beam
          Issue Type: Bug
          Components: java-fn-execution
            Reporter: Boyuan Zhang


In Java runner harness shared library code, the ActivateBundle is returned only 
when data channel is connected: 
https://github.com/apache/beam/blob/master/runners/java-fn-execution/src/main/java/org/apache/beam/runners/fnexecution/control/SdkHarnessClient.java#L268-L283.
 But the SDK can fail the bundle and sent the ProcessBundleResponse with error 
before registering data channel, e.g, throwing exceptions when creating 
FnApiDoFnRunner. This results in the runner gets timeout 
error(https://github.com/apache/beam/blob/master/runners/java-fn-execution/src/main/java/org/apache/beam/runners/fnexecution/data/GrpcDataService.java#L182)
 and doesn't populate possible error in ProcessBundleResponse. We need to find 
a way to abort sooner and populate correct error message.



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