mysqldump ignores some internal tables by default, such as:
I think the following tables should also be ignored by default:
The reason is that if someone tries to import a dump created by mysqldump, then a race condition between the import and the InnoDB persistent statistics calculation exists, and the user can see errors like this:
This was reported long ago in the following upstream bug report:
The workaround mentioned in that bug report is to disable InnoDB persistent statistics prior to the import:
However, it would be more ideal to make this workaround unnecessary by fixing the problem.