morningman opened a new issue #5862:
URL: https://github.com/apache/incubator-doris/issues/5862


   **Describe the bug**
   
   in fe.log, we can see OutOfMemoryError, and after restarting FE, the log is 
missing with error:
   ```
   Failed to find key xx in database
   ```
   
   This is because when writing the metadata log, an oom error may occur due to 
the log being too large.
   At this time, the log fails to be written, but the log's auto-increment id 
has been increased.
   Cause the id to be discontinuous.


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