Hi Kenneth, you will have to check your DB connection code and for possible bottlenecks. Does your DB accept enough connections? Any other clues in tomcat log files (also standard output)?
--Radek W. Kenneth Litwak wrote: > Hi Radek, > > Below I'm pasting what is at the bottom. I don't see any "deadlock" > string in the thread dump. I do see a bunch of threads waiting to get a > pooled JDBC connection. We are using the apache commons JDBC connection > pool code. This has been working okay until recently when the volume of > users went up. However, we don't need to have a big volume when tomcat > hangs. It takes several users about 6-7 minutes of using the > application to cause it to hang. I don't know what to make of that. > Thanks. > > Ken > > http-8081-Processor2" daemon prio=1 tid=0x083de8c0 nid=0x7d00 waiting > for monitor entry [8d878000..8d879ccc] > at java.sql.DriverManager.getConnection(DriverManager.java:187) > - waiting to lock <0xaf54d798> (a java.lang.Class) > at > edu.apu.db.DBConnectionFactory.getPooledConnection(DBConnectionFactory.j > ava:459) > at > edu.apu.directory.APUPersonDAO.runPersonQuery(APUPersonDAO.java:56) > at > edu.apu.directory.APUPersonDAO.findAPUPerson(APUPersonDAO.java:27) > at > edu.apu.gradreg.servlet.RegistrationServlet.doValidateView(RegistrationS > ervlet.java:248) > at sun.reflect.GeneratedMethodAccessor50.invoke(Unknown Source) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor > Impl.java:25) > at java.lang.reflect.Method.invoke(Method.java:324) > at > edu.apu.servlet.http.BaseServlet.runControlMethod(BaseServlet.java:513) > at edu.apu.servlet.http.BaseServlet.doView(BaseServlet.java:279) > at edu.apu.servlet.http.BaseServlet.doPost(BaseServlet.java:241) > at edu.apu.servlet.http.BaseServlet.doGet(BaseServlet.java:187) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:689) > at > edu.apu.servlet.http.BaseServlet.service(BaseServlet.java:158) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) > at --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
