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Posted to dev@kyuubi.apache.org by GitBox <gi...@apache.org> on 2022/02/18 12:49:13 UTC

[GitHub] [incubator-kyuubi] zhouyifan279 commented on issue #1936: [Bug] Engine token expired issue after idle for long time

zhouyifan279 commented on issue #1936:
URL: https://github.com/apache/incubator-kyuubi/issues/1936#issuecomment-1044473643


   We can send credentials  in `LaunchEngine` operation when it succeeds.
   
   Another case should be taken into consideration:
   1. kyuubi engine being idle and credentials have been expired.
   2. User created a KyuubiSession to this engine on kyuubi-server-1.
   3. Due to some reason (server restarted or server never talked to this engine),  kyuubi-server-1 has no cached credentials for this engine.
   4. Invoking `HadoopCredentialsManager#sendCredentialsIfNeeded` triggered a task to renew credentials but engine did not receive new credentials.
   5. Following SQL operation still fails due to expired credentials.
   


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