Summary of 90000 and 10102 errors
There are two duty finder servers.
Server 1- Adamantoise
- Balmung
- Cactuar
- Diabolos
- Exodus
- Goblin
- Hyperion
- Lamia
- Malboro
- Moogle
- Odin
- Ragnarok
- Siren
Server 2
- Behemoth
- Cerberus
- Coeurl
- Excalibur
- Faerie
- Gilgamesh
- Leviathan
- Midgardsormr
- Phoenix
- Sargatanas
- Shiva
- Ultros
It appears that only duty finder server 1 is overloaded (link), as players reporting this issue seem to only stem from that first group of servers.
Symptoms include:
- Getting kicked with the 90000 error and seeing 10102 errors in subsequent log in attempts.
- Entering an instance with an incomplete light party.