keith-turner commented on a change in pull request #2372:
URL: https://github.com/apache/accumulo/pull/2372#discussion_r763268668



##########
File path: 
server/compactor/src/main/java/org/apache/accumulo/compactor/Compactor.java
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@@ -184,7 +184,7 @@ protected void 
startCancelChecker(ScheduledThreadPoolExecutor schedExecutor,
         TimeUnit.MILLISECONDS);
   }
 
-  protected void checkIfCanceled() {
+  protected synchronized void checkIfCanceled() {

Review comment:
       > I noticed the cancel() method call on CompactionJobHolder is 
synchronized, so maybe that is enough.
   
   I think the existing sync in CompactionJobHolder will prevent any race 
conditions from happening.




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