Message in development console "ccu"

...
[19:22:59 INFO]: Client> [19:22:59] [Client thread/INFO]: Created: 256x256 textures/items-atlas
[19:23:01 INFO]: Client> [19:23:01] [MCO Availability Checker #1/ERROR]: Couldn't connect to Realms
[19:23:01 INFO]: Client> ccu: 
[19:23:01 INFO]: Client> 	at cbz.a(SourceFile:251) ~[14w05b.jar:?]
[19:23:01 INFO]: Client> 	at cbz.b(SourceFile:86) ~[14w05b.jar:?]
[19:23:01 INFO]: Client> 	at bfw.run(SourceFile:206) [14w05b.jar:?]