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Created attachment 100660 [details] the message log Tomcat was working fine in 6.9 and for some reason it stopped working. I just tried to start it in debug mode and regular mode and saw the following most SEVERE message in the error log: INFO [org.netbeans.modules.j2ee.deployment.plugins.api.UISupport]: Server without display name requested IO tab: null SEVERE [org.openide.util.RequestProcessor]: Error in RequestProcessor org.netbeans.modules.tomcat5.ide.StartTomcat$StartRunnable java.lang.NullPointerException at org.netbeans.modules.tomcat5.util.ServerLog.<init>(ServerLog.java:108) at org.netbeans.modules.tomcat5.util.LogManager.openServerLog(LogManager.java:102) at org.netbeans.modules.tomcat5.ide.StartTomcat$StartRunnable.openLogs(StartTomcat.java:583) [catch] at org.netbeans.modules.tomcat5.ide.StartTomcat$StartRunnable.run(StartTomcat.java:457) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1957)
*** This bug has been marked as a duplicate of bug 187032 ***
This solved it for me: Select a server in Project Properties->Run->Server.