When subsequent response time == "none" gk is not processing it correctly. We need to add a check for "none" and treat it although it was null (i.e. use initial response time to calculate sub response time) ---- Moved manually from Jira (JBNET-2291)
Should be included in 1.3.9 according to Jira. https://jira.jboss.org/jira/browse/JBNET-2258