-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Pieter,
Pieter Temmerman wrote: > Memory usage looks healthy, but CPU usage goes sky high (mainly caused > by the Java Tomcat process). That's interesting. Looking at your thread dump snippet, it looks like your database connection pool is exhausted. If that were the only problem, you'd have very low CPU usage because everything would be blocked waiting. Something else must be going on. > My first question is, what is a TP-Processor exactly? Is each client > connection to Tomcat being assigned a TP-Processor or am I wrong? Each HTTP connection is assigned a TP-Processor for the duration of the request. > But for some kind of reason, there is never a free > one available, and the application just won't work until Tomcat is > restarted. You are probably leaking them somewhere. The fact that your server stays up for an arbitrary amount of time leads me to believe that you have a leak in one place, but not everywhere. So, if someone is using that leak-prone code a lot, you exhaust your connection pool quickly, but if not, the server stays up for a long time. Are you using Tomcat's DBCP? If so, enable all the debugging features (logAbandoned, removeAbandoned, etc.) which should lead you to the code that is leaking connections. > Note the line "locked <0x00002aabadaabff8>" and "waiting on > <0x00002aabadaabff8>" later on. So first it's locking that "thing" and > then it's waiting on that "thing". This same number is coming back in > each TP-Processor that is in waiting state. That seems rather weird to > me. That's just the way the thread dump looks. > So I was wondering: > a. Is that normal behavior? Yes, assuming that resource exhaustion is considered "normal". > b. Is there any way to know what the 0x00002aabadaabff8 means? Yes. > My scientific calculator says it's rather an insane number when trying > to convert it to decimal. It's just a pointer, so knowing the decimal value is pretty useless. > Maybe it's just as easy as it reads: Waiting on 0x0002aabad....which is > a GenericObjectPool. Right: the JVM tells you what object 0x0000abababa... is. - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkmAexUACgkQ9CaO5/Lv0PAPvgCeOdXkDSuJLihFpmJkoM8H76wB sQYAnjbok0n5vgaeJHv5x0P25N+6ayMJ =SkV/ -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
