keith-turner opened a new issue, #2745:
URL: https://github.com/apache/accumulo/issues/2745

   
   **Describe the bug**
   
   Saw the following problem during scan server testing.  Do not fully 
understand it, but disabling the thread timeout resulted in a massive 
performance difference in the scan servers.  The same code is used by tablet 
servers, so its possible it could impact them also.
   
   
https://github.com/apache/accumulo/pull/2665/files/973ffe55c90bf404bcb01fe49710ab39f7524e67#r884056358
   
   **Expected behavior**
   
   Not seeing client connections have erratic long pauses when many 100's of 
threads are trying to scan.
   
   Need to better understand this problem and see what if anything should be 
done.   Also may want to look at how 1.10 and 2.0 handles this in code and w/ 
its default config.  I have done this type of heavy load testing in 1.10. and 
2.0 before w/o encountering a similar issue.
   


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