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I'm running a TiDB 7.x cluster with TiFlash nodes. I am some queries to slow down or fail intermittently. and I'm encountering the following error in the TiFlash logs:

[2025/08/22 09:30:07.938 +00:00] [ERROR] [LocalAdmissionController.cpp:122] ["Code: 49, e.displayText() = DB::Exception: Check added_tokens >= 0 failed, e.what() = DB::Exception, Stack trace: ..."] [source=LocalAdmissionController]

And store size of tiflash increasing. Cluster details:

  • TiDB version: 7.x
  • TiFlash nodes: 3, running in Kubernetes
  • The issue started recently without obvious cluster changes.

What I've tried:

  • Restarting TiFlash, PD, TiDB pods

Any insight or recommendations would be appreciated!

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