Обсуждение: Help - is this a JDBC issue??
I'm working on a web application and everything was fine until this morning when I modified some Java code copied it
overran the application and got this:
Error: 500
Location: /nzfm_frame.htm
Internal Servlet Error:
java.lang.IllegalStateException: Can't happen - classname is null, who added this ?
at org.apache.tomcat.core.ServletWrapper.loadServlet(ServletWrapper.java:261)
at org.apache.tomcat.core.ServletWrapper.init(ServletWrapper.java:289)
at org.apache.tomcat.core.Handler.service(Handler.java:254)
at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:812)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:758)
at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:213)
at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:501)
at java.lang.Thread.run(Thread.java:484)
Now I can't get to any pages not even the index page, I have taken the code out that I added to check if it was causing
that(didn't think it could be) all I get is this above error. Is this to do with the JDBC driver or Tomcat?
taupo=> select version();
version
---------------------------------------------------------------
PostgreSQL 7.1.3 on i686-pc-linux-gnu, compiled by GCC 2.95.3
JDBC Driver:
jdbc7.1-1.2
The application code is pretty much all written on the JSP pages and I am refactoring the code for a model view
controllerarchitecture, only just started the refactoring, nothing that could be causing this I'm sure. The code I had
beenadding this morning just manipulated string formatting.
Advice please! The system is supposed to be in a state that the users can have a preview of it tomorrow!
Regards,
Sharon Cowling
I think the JDBC thing may be a red herring. I've seen
java.lang.IllegalStateException with tomcat as the servlet container, and
it's usually because there is a redirect attempted after the buffer has been
flushed... but of course there could be a lot of other tomcat reasons.
AFAIK, JDBC should only throw SQLExceptions, no?
-----Original Message-----
From: pgsql-jdbc-owner@postgresql.org
[mailto:pgsql-jdbc-owner@postgresql.org]On Behalf Of Sharon Cowling
Sent: Tuesday, April 23, 2002 3:28 PM
To: pgsql-jdbc@postgresql.org
Subject: [JDBC] Help - is this a JDBC issue??
I'm working on a web application and everything was fine until this morning
when I modified some Java code copied it over ran the application and got
this:
Error: 500
Location: /nzfm_frame.htm
Internal Servlet Error:
java.lang.IllegalStateException: Can't happen - classname is null, who added
this ?
at
org.apache.tomcat.core.ServletWrapper.loadServlet(ServletWrapper.java:261)
at org.apache.tomcat.core.ServletWrapper.init(ServletWrapper.java:289)
at org.apache.tomcat.core.Handler.service(Handler.java:254)
at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
at
org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:81
2)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:758)
at
org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpC
onnectionHandler.java:213)
at
org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
at
org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:501)
at java.lang.Thread.run(Thread.java:484)
Now I can't get to any pages not even the index page, I have taken the code
out that I added to check if it was causing that (didn't think it could be)
all I get is this above error. Is this to do with the JDBC driver or
Tomcat?
taupo=> select version();
version
---------------------------------------------------------------
PostgreSQL 7.1.3 on i686-pc-linux-gnu, compiled by GCC 2.95.3
JDBC Driver:
jdbc7.1-1.2
The application code is pretty much all written on the JSP pages and I am
refactoring the code for a model view controller architecture, only just
started the refactoring, nothing that could be causing this I'm sure. The
code I had been adding this morning just manipulated string formatting.
Advice please! The system is supposed to be in a state that the users can
have a preview of it tomorrow!
Regards,
Sharon Cowling
---------------------------(end of broadcast)---------------------------
TIP 4: Don't 'kill -9' the postmaster
Sharon, As it turns out I just read something about this yesterday. This can occur when refactoring code in a jsp environment. Often you need to restart the tomcat server to get the classes loaded properly. Dave P.S. it's also one of the reasons why I use a template engine ;) On Tue, 2002-04-23 at 18:28, Sharon Cowling wrote: > I'm working on a web application and everything was fine until this morning when I modified some Java code copied it overran the application and got this: > > Error: 500 > Location: /nzfm_frame.htm > Internal Servlet Error: > java.lang.IllegalStateException: Can't happen - classname is null, who added this ? > at org.apache.tomcat.core.ServletWrapper.loadServlet(ServletWrapper.java:261) > at org.apache.tomcat.core.ServletWrapper.init(ServletWrapper.java:289) > at org.apache.tomcat.core.Handler.service(Handler.java:254) > at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372) > at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:812) > at org.apache.tomcat.core.ContextManager.service(ContextManager.java:758) > at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:213) > at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416) > at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:501) > at java.lang.Thread.run(Thread.java:484) > > Now I can't get to any pages not even the index page, I have taken the code out that I added to check if it was causingthat (didn't think it could be) all I get is this above error. Is this to do with the JDBC driver or Tomcat? > > taupo=> select version(); > version > --------------------------------------------------------------- > PostgreSQL 7.1.3 on i686-pc-linux-gnu, compiled by GCC 2.95.3 > > JDBC Driver: > jdbc7.1-1.2 > > The application code is pretty much all written on the JSP pages and I am refactoring the code for a model view controllerarchitecture, only just started the refactoring, nothing that could be causing this I'm sure. The code I had beenadding this morning just manipulated string formatting. > > Advice please! The system is supposed to be in a state that the users can have a preview of it tomorrow! > > > Regards, > > Sharon Cowling > > > > ---------------------------(end of broadcast)--------------------------- > TIP 4: Don't 'kill -9' the postmaster > >