keith-turner commented on issue #5117:
URL: https://github.com/apache/accumulo/issues/5117#issuecomment-2518542540

   In addition to causing thread contention this issue has the potential to 
cause memory problems.  Ran into the following problem.
   
   Was using the changes in https://github.com/apache/accumulo-testing/pull/287 
to generate bulk imports.  This bug in 287 
https://github.com/apache/accumulo-testing/pull/288 caused some bulk imports to 
a single tablet to have lots of files.  Did not have the 288 bug fix in testing 
and ended up with a tablet w/ 25K files.  There were lots of concurrent 
compactions running against this tablet.  When these finished they would create 
a conditional mutation which included the 25k files in a condition.   These 
conditional mutations would cause lots of memory pressure on the tablet server.
   
   


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