Eg: 2014-05-27 13:49:37-0700 [Broker,13033,10.134.53.56] Peer will receive following PB traceback: 2014-05-27 13:49:37-0700 [Broker,13033,10.134.53.56] Unhandled Error Traceback (most recent call last): Failure: twisted.cred.error.UnauthorizedLogin: But there's other errors from other masters too. 10.134.53.56 is bld-linux64-ec2-1017, so I suspect something related to Rail's recent work on dns-less images...did you forget to add ec2-1xxx to the slave list?

wrong slave name, looking

I added those to slavealloc by mistake. The DNSless cloud-tools branch I've been testing was spinning them. No harm just some spam I terminated the running instances and deleted the slave from slavealloc: mysql> delete from slaves where name like '___-linux__-ec2-1___'; Query OK, 200 rows affected (0.03 sec)