In Microsoft Exchange Server 2016, the Event 1009 warning message frequently occurs in your application logs for each of the lagged database copies. This issue causes SCOM to constantly report an error on the servers that have a lagged copy. Therefore, the application logs are filled up with those warning messages.
The Event 1009 warning is raised because the FeedingSkippedException is thrown when the server starts SearchFeedingController for a lagged copy. This exception is thrown if content-index state of database copy isn't healthy. Content indexing is auto suspended for lagged copies by design. This is done to reduce the load on the mailbox server. But currently, there isn't any check to disable the SearchFeedingController for lagged copies.
Learn about the terminology that Microsoft uses to describe software updates.