Same here

World: Balmung
Character: Endu Mahariel
Game version: PC

Steps:
1. Got DC'ed and the 9000 error earlier a little before the last maintenance, while zoning from the South Shroud to the East Shroud.
2. Waited a bit then tried to log back in and got 10102
3. Decided to leave it for a bit, and when I came back to try again the most recent emergency maintenance had just begun.
4. Tried logging in again afterwards and got "The world is currently full. Please try again later."
5. Followed those instructions and waited a few hours, came and tried again. This time I got into the login que, but when my turn popped in the que I got the 10102 error as it tried to load me in.