milleruntime commented on issue #2567:
URL: https://github.com/apache/accumulo/issues/2567#issuecomment-1069175637


   OK here is what was going on:
   <pre>
   2022-03-15T09:17:50,676 [memory.LargestFirstMemoryManager] DEBUG: COMPACTING 
28;7;6  total = 272,062,261 ingestMemory = 90,808,517
   tserver1.log:2022-03-15T09:17:50,471 [tablet.Tablet] ERROR: Data files in 
28;7;6 differ from in-memory data ...
   tserver1.log:2022-03-15T09:17:50,655 [tablet.files] DEBUG: Flushed 28;7;6 
created hdfs://localhost:8020/accumulo/tables/28/t-00002pt/F00004hu.rf from 
[memory]
   </pre>
   
   The reason for the difference between in-memory and on disk is because the 
file (F00004hu.rf) had not been flushed yet. Looking at the difference in the 
logs between the 2 sets of files (there were 160 r-files in each set), the 
second set of files (memory) was missing the file. In other words, the file was 
on disk but not in memory.
   


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