IllegalArgumentException will be raised when database has no tables.

https://github.com/apache/incubator-doris/blob/c6ac60bab9563a77b052a2766b0de859528aee41/fe/src/main/java/org/apache/doris/consistency/ConsistencyChecker.java#L267

PriorityQueue will raise an IllegalArgumentException when initialized with initailCapacity less than 1, which will leads to an error log printed in fe.log periodically 。

Best regards!