2015-11-07 0:52 GMT+03:00 Christopher Schultz <ch...@christopherschultz.net>: > Utkarsh, > > On 11/6/15 12:47 PM, Utkarsh Dave wrote: >> Hello, >> In tomcat 7 >> I wanted to know if there is a way we can log the number of request >> dispatcher threads used/busy/blocked, in log files. Or is there a mechanism >> that logs the number of request threads so that user can be warned about >> the request dispatcher threads if too many are being in busy state due to >> too many sessions or BLOCKED situations. >> Situation like this may result in DoS situation and tomcat becomes >> unresponsive. > > This is a perfect use case for monitoring using JMX: > > http://wiki.apache.org/tomcat/FAQ/Monitoring > > http://events.linuxfoundation.org/sites/events/files/slides/Monitoring%20Apache%20Tomcat%20with%20JMX.pdf
+1 BTW, for some ideas you may also want to look at - StuckThreadDetectionValve [1] It won't help with responsiveness, but it may help to identify weak spots in your own web application. - SemaphoreValve [1] As an example. - maxActiveSessions attribute of StandardManager [2] Also you may want to look at the Status page of Tomcat Manager web application and corresponding source code as an example of working with JMX. [1] http://tomcat.apache.org/tomcat-7.0-doc/config/valve.html [2] http://tomcat.apache.org/tomcat-7.0-doc/config/manager.html --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
