possible run away process - much errors

[Clockwork]

Hello,

since today I receive much errors like this:

No request delivery notification has been received from LSAPI process group [3540], possible run away process.
Retry with new process group.

and this one:

Connection idle time: 151 while in state: 5 watching for event: 25,close!
Content len: 0, Request line:
GET /forum/ HTTP/1.1
Redirect: #1, URL: /forum/vbseo.php
HttpExtConnector state: 8, request body sent: 0, response body size: 0, response body sent:0, left in buffer: 46096, attempts: 0.
All pending requests are finished, stop process group lead by pid: 3948

any idea whats causing this?

When the first error occurs (delivery notification) the server gets really slow (high waitq).

p.s. I'm using lslb for load balancing