vrajat opened a new issue, #16060:
URL: https://github.com/apache/pinot/issues/16060

   `QueryServer` in MSE submits work asynchronously.
   
   OOM protection framework assumes that there is a runner thread which is 
waiting for all the worker threads. The framework cancels the runner thread if 
required. Worker threads check regularly if the anchor thread is canceled and 
abort if it is.
   
   Since `QueryServer` submits asynchronously, the above assumptions break 
down. It is unclear if cancellation by OOM protection works for MSE. If it 
does, it is by luck. 


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