duanshilong created SPARK-54546:
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             Summary: Use port instead of hostPort
                 Key: SPARK-54546
                 URL: https://issues.apache.org/jira/browse/SPARK-54546
             Project: Spark
          Issue Type: Bug
          Components: Spark Core
    Affects Versions: 4.0.0
            Reporter: duanshilong


Rename hostPort to host because executorIdToHost stores only the hostname (or 
IP), not the host:port combination. This improves code clarity and prevents 
potential misuse.

{code:scala}
executorIdToHost(o.executorId) = o.host
{code}
so, when we get host from executorIdToHost, we should us host instead of 
hostPort.
{code:scala}
val hostPort = executorIdToHost(executorId)
{code}




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