[GitHub] gianm commented on a change in pull request #6782: Improve doc for auto compaction

[GitBox <gi...@apache.org>]

gianm commented on a change in pull request #6782: Improve doc for auto compaction
URL: https://github.com/apache/incubator-druid/pull/6782#discussion_r246174899
 
 

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 File path: docs/content/configuration/index.md
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 @@ -820,7 +820,12 @@ An example of compaction config is:
 }
 ```
 
-For realtime dataSources, it's recommended to set `skipOffsetFromLatest` to some sufficiently large value to avoid frequent compact task failures.
+Note that compact tasks can fail if their locks are revoked by other tasks of higher priorities.
+Since realtime tasks have a higher priority than compact task by default,
+it can be problematic if there're frequent conflicts between compact tasks and realtime tasks.
+If this is the case, coordinator's automatic compaction might be stuck because of the frequent compact task fails.
 
 Review comment:
   might get stuck
   
   because of frequent compact task failures

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