[SPARK-50735][CONNECT] Failure in ExecuteResponseObserver results in infinite reattaching requests #49370
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What changes were proposed in this pull request?
ExecuteGrpcResponseSender checks whether the associated ExecuteThreadRunner is completed to return an error if the ExecuteThreadRunner has failed to record the outcome.
Why are the changes needed?
ExecuteResponseObserver.{onError, onComplete} are fallible while they are not retried; this leads to a situation where the ExecuteThreadRunner is completed without succeeding in responding to the client, and thus the client keeps retrying by reattaching the execution.
Does this PR introduce any user-facing change?
No.
How was this patch tested?
testOnly org.apache.spark.sql.connect.service.SparkConnectServiceE2ESuite
Was this patch authored or co-authored using generative AI tooling?
No.