nnvscholar-collab opened a new issue, #7720:
URL: https://github.com/apache/kyuubi/issues/7720

   ### Code of Conduct
   
   - [x] I agree to follow this project's [Code of 
Conduct](https://www.apache.org/foundation/policies/conduct)
   
   
   ### Search before asking
   
   - [x] I have searched in the 
[issues](https://github.com/apache/kyuubi/issues?q=is%3Aissue) and found no 
similar issues.
   
   
   ### Describe the bug
   
   MetadataManager.insertMetadata intentionally fails fast when it hits a 
duplicate-key error (unrecoverableDBErr), rethrowing rather than queuing a 
retry. However, when an InsertMetadata request that is already in the async 
retry queue is replayed by startMetadataRequestsAsyncRetryTrigger, it calls 
insertMetadata(metadata, asyncRetryOnError = false). If that replay hits a 
duplicate-key error (e.g. because the original insert actually succeeded and 
only the acknowledgment was lost), the exception is not caught by any case in 
insertMetadata and propagates out of the retry loop's while block before 
ref.metadataRequests.remove(request) runs. The request is left at the head of 
the queue and is retried indefinitely, blocking all later queued requests for 
that session — the same amplification pattern reported in #7708 for updates, 
but for inserts.
   
   Additional context:
   Raised during review of #7709 by @pan3793: "the queued InsertMetadata retry 
path has a similar amplification pattern... Worth a follow-up issue."
   
   Affects Version(s): master
   
   Are you willing to submit a PR? Yes.
   
   ### Affects Version(s)
   
   Master
   
   ### Kyuubi Server Log Output
   
   ```logtalk
   
   ```
   
   ### Kyuubi Engine Log Output
   
   ```logtalk
   
   ```
   
   ### Kyuubi Server Configurations
   
   ```yaml
   
   ```
   
   ### Kyuubi Engine Configurations
   
   ```yaml
   
   ```
   
   ### Additional context
   
   _No response_
   
   ### Are you willing to submit PR?
   
   - [ ] Yes. I would be willing to submit a PR with guidance from the Kyuubi 
community to fix.
   - [ ] No. I cannot submit a PR at this time.


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