We have implemented SDM r12.7 in our environment.
Recently we are facing the issue where we are getting error message as "AHD4409 pdmweb is unable to connect with the webengine" at the time of accessing the web page.The same issue has been observed 3-4 times in last 10 days.
The issue temporarily gets reolved when we restart tomcat using commands pdm_tomcat_nxd -c stop and pdm_tomcat_nxd -c start.
Does anyone faced the same issue before? Is there any long term resolution for this?