Thread: Help - is this a JDBC issue??

Help - is this a JDBC issue??

From

Sharon Cowling

Date:

23 April 2002, 21:25:44

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

Re: Help - is this a JDBC issue??

From

"Ryan Chambers"

Date:

23 April 2002, 21:32:56

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



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Re: Help - is this a JDBC issue??

From

Dave Cramer

Date:

23 April 2002, 21:39:22

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
>
>