We have an HTTP sensor that went into error state with the message "DNS could not be resolved (socket error # 11004)". However on the probe (core server) nslookup returns the correct address. Also when we run "ipconfig /displaydns" to see the resolver cache the correct address is listed for the website. Even more, if we fire up firefox we are able to successfully bring up the sensor's page.
Short of restarting the probe or core services, what can we do to fix this problem?