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Hi,   Thanks for the update. We would like to do a GoTo Meeting(GTM) an (online meeting session) to debug this issue further. If you are ready to do a GTM, please let us know atleast 2-3  time slots along with time zone that works for you. Based on time slots that you provide, we will send out a GTM invite   Thanks Rajesh ... View more

Hi,   Based on the exception it looks like internal events service which is much needed for showing wait state information on DB might not be running. So   could you please follow below steps and let us know if you see any improvement. 1) Stop the events service by running this command: On Linux Navigate to < controller -install-dir>/bin Stop Events Service using ./ controller .sh stop-events-service wait for 1-2 mins and then start using controller .sh start-events-service On Windows Navigate to < controller -install-dir>/bin Stop Events Service using controller .bat stop-events-service wait for 1-2 mins and then start using controller .bat start-events-service If events service is installed as windows service, with elevated privileges(Run As Administrator) From services.msc, stop and start the service corresponding to controller events service Wait for 5 mins and then see if you still see any such messages. Please find the docs link for the same https://docs.appdynamics.com/d isplay/PRO42/Start+or+Stop+the + Controller #StartorStoptheCont roller-StartandStoptheEventsSe rvice Post that things should be normal and you should be able to see db agent stats reporting to controller provide you have given all permissions to the user whom you configured on DB Collectors.   PS : Any query which is taking less than 1 second will not be shown on Database Query tab.   Thanks Rajesh ... View more

Thanks James. Before you apply this change, could you please cross check whether that  particular metric is filled with zero values or not when there is no data reported. You could check those values of that metric from metric browser.   If this is not filled with zero when there is no data reported for that metric, please go ahead and apply the recommendations as mentioned earlier.     Thanks Rajesh ... View more

Hi James,   Before i answer your question, i would like to give you some technical information and then that explains your question   We have an option to zero fill metric values when there is no data reported for that metric. As you mentioned that the metric which you are using in metric expression calculation  to plot on dashboard has some times no data reported and in those cases, you see calculation failures.   To avoid it, you could give a try of this option to fill the no data values with zero when that metric doesn't get any values reported.     Steps for making those changes   1) Take a backup of domain.xml file located under <controller-install-dir>/appserver/glassfish/domains/domain1/config/   2) Stop controller appserver as shown here   Navigate to <controller-install-dir>/bin   For windows   controller.bat stop-appserver   For Linux   ./controller.sh stop-appserver   3) Please ensure that appserver is stopped using ps -ef |grep "java"   4) Once controller appserver is stopped, go to domain.xml file located under <controller-install-dir>/appserver/glassfish/domains/domain1/config/   add    <jvm-options>-Ddisable.zero.fill=false</jvm-options>   along with other JVM options   5) Restart controller appserver as shown here   For windows   controller.bat start-appserver   For Linux   ./controller.sh start-appserver   Wait for 10-15 mins for appserver to start and then check the behavior. You expect to see zero filled values for no data reported for metrics.   Thanks Rajesh ... View more