the trusty kernel didn't helped at all.
worker 03 has been updated to mainline kernel:
root@cx1000-03:~# uname -a Linux cx1000-03 3.18.0-031800-generic #201412071935 SMP Mon Dec 8 00:36:34 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
the trusty kernel didn't helped at all.
worker 03 has been updated to mainline kernel:
root@cx1000-03:~# uname -a 031800- generic #201412071935 SMP Mon Dec 8 00:36:34 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
Linux cx1000-03 3.18.0-