"Internal Server Error"

My server has been running without problems the last few weeks. However, whenever a player ranked anything but default, they are given the message "internal server error." But they are still listed as online until the server is stopped to everyone else. People can tp to them and any other commands, but they can not see them. This only happens with players that are ranked. I use PermissionsEx.

 

paste console when they log in.

 

here's the paste from console log:

Code:

20:15:21 [INFO] XXXXXXXX [/XXX.XXX.XXX.XXX:56603] lost connection
20:15:25 [INFO] Disconnecting XXXXXXXX [/XXX.XXX.XXX.XXX:56603]: Failed to verify username!
20:15:25 [WARNING] Exception verifying XXXXXXXX
java.lang.NullPointerException
        at net.minecraft.server.v1_5_R1.ThreadLoginVerifier.run(ThreadLoginVerifier.java:51)
20:15:30 [INFO] XXXXXXXX [/XXX.XXX.XXX.XXX:56603] lost connection
20:15:34 [INFO] Disconnecting XXXXXXXX [/XXX.XXX.XXX.XXX:56657]: Failed to verify username!
20:15:34 [WARNING] Exception verifying XXXXXXXX
java.lang.NullPointerException
        at net.minecraft.server.v1_5_R1.ThreadLoginVerifier.run(ThreadLoginVerifier.java:51)
20:15:48 [INFO] XXXXXXXX [/XXX.XXX.XXX.XXX:56768] lost connection
20:15:55 [INFO] Disconnecting jdsobFTW [/173.54.198.219:56768]: Failed to verify username!
20:15:55 [WARNING] Exception verifying XXXXXXXX
java.lang.NullPointerException
        at net.minecraft.server.v1_5_R1.ThreadLoginVerifier.run(ThreadLoginVerifier.java:51)

 

Mojang's auth servers have been funky for a bit now.

"20:15:25 [INFO] Disconnecting XXXXXXXX [/XXX.XXX.XXX.XXX:56603]: Failed to verify username!"

Would lead me to believe their username wasn't validated.

 

The problem is, it happens every time they try to join.

 

Well like minicl55 said Mojang's server have been funky(you'd think a multi-millionaire dollar company could give us better nameservers) and so if you're servers been fine it's probably their fault, not yours. And so it's not going to get fixed instantly, but one day you'll stop having the problem because Mojang fixed their servers.