Tengfei Huang created SPARK-54433:
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             Summary: Remove unnecessary syncrhonized usage in standalone worker
                 Key: SPARK-54433
                 URL: https://issues.apache.org/jira/browse/SPARK-54433
             Project: Spark
          Issue Type: Improvement
          Components: Spark Core
    Affects Versions: 4.0.1
            Reporter: Tengfei Huang


Worker is a `ThreadSafeRpcEndpoint`, no need to use synchronized block if there 
are no extra async operations while handling the rpc messages.



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