team city bot permissions to trigger builds

Hello colleagues, I have troubles invoking builds and re-runs from the team city bot interface. If I click on the corresponding buttons ("Trigger build" or "Re-run possible blockers") it shows the "Internal Server Error [500]." in the UI and the chrome dev tools shows that bot backend actual

[MTCGA]: new failures in builds [6544163] needs to be handled

Hi Igniters, I've detected some new issue on TeamCity to be handled. You are more than welcomed to help. If your changes can lead to this failure(s): We're grateful that you were a volunteer to make the contribution to this project, but things change and you may no longer be able to finalize

Performance of cancelling services (related to IGNITE-17274)

Testing with 60,000+ services, found that cancelling large numbers of services takes significant time. Found another linear lookup that can be optimized with a map. Here is a commit that fixes the problem in local testing: https://github.com/artnaseef/ignite/commit/4ca87f7f6e7aae193faf1404736e0b