We are using the TCPResponse interface to check if webservers are responding by setting Location2=11 and "DEVICE=<URL>; PROT=HTTP" in the different webservers Instrument tags.
If a webserver doesn't respond the interface returns a "I/O Timeout" for the affected server and other responsive webservers which are scanned within up to 35 secs after scanning of the non responsive webserver. A workaround can be to use a scan class for each webserver and scan webservers with a interval >35 sec interval. (Tested with a 1 min scan interval.)
An explanation can be that the "third-party library function call" mentioned on page 10 in the "Web Page Loading Time" section is not thread safe and waiting for a timeout before it can resume normal operation.
Is this a know error?