changgyoopark-db opened a new pull request, #46971:
URL: https://github.com/apache/spark/pull/46971
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### What changes were proposed in this pull request?
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This change lets a Scala Spark Connect client reattempt execution of a plan
when it receives a SESSION_NOT_FOUND error from the Spark Connect service if it
has not received any partial responses.
This is a Scala version of the previous fix of the same issue -
https://github.com/apache/spark/pull/46297.
### Why are the changes needed?
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Spark Connect clients often get a spurious error from the Spark Connect
service if the service is busy or the network is congested. This error leads to
a situation where the client immediately attempts to reattach without the
service being aware of the client; this leads to a query failure.
### Does this PR introduce _any_ user-facing change?
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Prevoiusly, a Scala Spark Connect client would fail with the error code
"INVALID_HANDLE.SESSION_NOT_FOUND" in the very first attempt to make a request
to the service, but with this change, the client will automatically retry.
### How was this patch tested?
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Attached unit test.
### Was this patch authored or co-authored using generative AI tooling?
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No.
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