[I] [Bug] Engine discovery polls without a delay when application information is unavailable [kyuubi]

["ruanwenjun (via GitHub)" <gi...@apache.org>]

ruanwenjun opened a new issue, #7736:
URL: https://github.com/apache/kyuubi/issues/7736

   ### Description
   
   After the engine submission process exits successfully, `EngineRef.create` stops calling `process.waitFor`. Its remaining polling delay is conditional on `lastApplicationInfo.isDefined` and is inside `Option(engineManager).foreach`.
   
   If no application operation supports the resource manager, `getApplicationInfo` returns `None`. While the engine has not registered, the loop then repeatedly queries service discovery without an explicit delay. The same gap exists when the application manager is absent. This is not the normal Kubernetes Pod-not-observed path, which returns an `ApplicationInfo` value.
   
   The polling delay should depend on the submission process having exited and the engine still being undiscovered, rather than on application-info availability. Keep the existing process wait while submission is running.
   


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Re: [I] [Bug] Engine discovery polls without a delay when application information is unavailable [kyuubi]

["ruanwenjun (via GitHub)" <gi...@apache.org>]

ruanwenjun closed issue #7736: [Bug] Engine discovery polls without a delay when application information is unavailable
URL: https://github.com/apache/kyuubi/issues/7736


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