Also some times got this.

[WARNING] 18/05/03 11:56:45 Stratum connection interrupted                      |
[WARNING] 18/05/03 11:57:06 Stratum connection interrupted                      |
[WARNING] 18/05/03 11:57:27 Stratum connection interrupted                      |
[WARNING] 18/05/03 11:57:48 Stratum connection interrupted