Hi Knut, Maybe there will be useful information to check in log files ColdFusion11\instance\logs\coldfusion-error.log . Perhaps compare the details in log for when a instance is stopped on purpose versa when it is somehow stopped by stopping another instance. Here is an example of CF11 instance being put thru a stop to have something to compare: Nov 03, 2016 3:26:10 PM org.apache.catalina.core.StandardServer await INFO: A valid shutdown command was received via the shutdown port. Stopping the Server instance. Nov 03, 2016 3:26:10 PM org.apache.coyote.AbstractProtocol pause INFO: Pausing ProtocolHandler ["http-apr-8506"] Nov 03, 2016 3:26:10 PM org.apache.coyote.AbstractProtocol pause INFO: Pausing ProtocolHandler ["ajp-apr-8020"] Nov 03, 2016 3:26:11 PM org.apache.catalina.core.StandardService stopInternal INFO: Stopping service Catalina Nov 03, 2016 3:26:16 PM org.eclipse.jetty.util.log.JavaUtilLog info INFO: Stopped ServerConnector@5694cc4c{HTTP/1.1}{0.0.0.0:5503} Nov 03, 2016 3:26:16 PM org.eclipse.jetty.util.log.JavaUtilLog info INFO: Stopped o.e.j.s.ServletContextHandler@38fe5b83{/,null,UNAVAILABLE} ... Nov 03, 2016 3:26:16 PM org.apache.coyote.AbstractProtocol stop INFO: Stopping ProtocolHandler ["http-apr-8506"] Nov 03, 2016 3:26:16 PM org.apache.coyote.AbstractProtocol stop INFO: Stopping ProtocolHandler ["ajp-apr-8020"] HTH, Carl.
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