> -----Original Message----- > From: Daniel Mikusa [mailto:dmik...@vmware.com] > Sent: Monday, April 01, 2013 1:09 PM > To: Tomcat Users List > Subject: Re: how to monitor the traffic through the connector > > On Apr 1, 2013, at 1:40 PM, a wrote: > > > Hi, > > > > Thank you for reply. > > The servlet of the web application does not response to the request > > after running serveral months. The problem can be solved by > restarting the tomcat. > > I want to troubleshoot by monitoring the number of avaliable threads > > or occupied threads. > > > > Thank you > > > > First, don't top post (i.e. reply at the top of your email). Either > reply below the previous response or as typically works best, inline. > > Second, when you encounter a problem with your servlet / Tomcat, take > three or four thread dump, separated by 15 - 20 seconds each. Each > thread dump will show you the current status of all the threads in the > JVM. You can use the thread dumps to check for block threads and long > running processes. > > Instructions for taking a thread dump. > > > https://wiki.apache.org/tomcat/HowTo#How_do_I_obtain_a_thread_dump_of_m > y_running_webapp_.3F > > Dan >
FWIW, I've found jconsole immensely helpful in sorting out blocked threads. And none of that manually searching through dumps. Jeff > > > > > > > "Daniel Mikusa" <dmik...@vmware.com> wrote in message > > news:23de8f95-ca84-4956-9fdb-2987f1aaa...@vmware.com... > > On Mar 26, 2013, at 6:32 PM, a wrote: > > > >> Hi, > >> > >> I have defined a connector for port80. For example, > >> <Connector port="80" > >> maxThreads="150" > >> minSpareThreads="25" > >> maxSpareThreads="75" > >> enableLookups="false" > >> acceptCount="100" > >> debug="0" > >> connectionTimeout="2000" > >> disableUploadTimeout="true" > >> compression="on" > >> address="192.168.223.5"/> > >> > >> Is there any way to monitor the statistics that get throught the > port? > > > > No idea what you mean by this. Can you elaborate? > > > >> I need to log when the requst is fail, > > > > Do you have an access log valve setup? That will log the HTTP status > code. > > You can grep for 500 to get the errors. > > > > > > https://tomcat.apache.org/tomcat-7.0- > doc/config/valve.html#Access_Log_ > > Valve > > > >> and I need to know the number of > >> threads is consumed when the request is fail. > > > > The access log valve can tell you the thread name of the thread that > > handled your request with the "%I" option. I'm not sure there's an > > easy way to get the total threads in use at the time a request fails > > though. What is your rationale for needing this information? > > > > Dan --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
