dtspence commented on issue #3909:
URL: https://github.com/apache/accumulo/issues/3909#issuecomment-1789634730

   @keith-turner @dlmarion As a possibly related issue (but less severe), we 
observed that an incorrect `accumulo.properties` configuration caused the 
default compaction planner to report an exception during initialization - but 
still allow the tablet-server to start-up (i.e. without a default service).
   
   The error manifested in the tablet-server logs as (note we believe there is 
no default service due to the error at start-up):
   ```
   ERROR: Tablet<> returned non-existent compaction service default for 
compaction type SYSTEM. Check the table compaction dispatcher configuration. 
Attempting to fall back to default service.
   ```
   
   At tablet server start-up there is a message:
   ```
   [compactions.CompactionManager] ERROR: Failed to create compaction service 
default with planner:<attempted configuration>
   com.google.gson.JsonSyntaxException ...
   ...
   at 
org.apache.accumulo.core.spi.compaction.DefaultCompactionPlanner.init(DefaultCompactionPlanner.java:54)
   at 
org.apache.accumulo.tserver.compactions.CompactionService.<init>(CompactionService.java:107)
   at 
org.apache.accumulo.tserver.compactions.CompactionManager.<init>(CompactionManager.java:200)
   at org.apache.accumulo.tserver.TabletServer.run(TabletServer.java:774)
   ...
   ```
   


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