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I found out start of profiling of an web application after restart of IDE enforced by e.g. profiler deadlock or some problem with profiling, always ends by error: WebApplication/nbproject/profiler-build-impl.xml:30: Starting server in profile mode failed. It can be fixed by restart IDE and start tomcat in profile mode.
May be the similar problem as seen when profiling GlassFish. After any error occurs during server startup/profiling and profiling session and/or server are killed, agent identification file in user directory ($HOME/.nbprofiler) isn't deleted. This causes problems when starting another profiling session (STATE_INACTIVE instead of STATE_STARTING).
This issue was hopefully fixed together with issue #82722. Please reopen if you can still reproduce it. *** This issue has been marked as a duplicate of 82722 ***
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