Subject Re: [Firebird-Java] Re: Problem with connections and Tomcat JNDI
Author David Jencks
The exception comes from driver pooling code before any attempt to
establish a connection is made. I think maxsize must be getting set to 0.
Please try explicitly setting it to a positive value.

thanks
david jencks

On 2002.04.02 17:19:03 -0500 bradenw2 wrote:
> Yes, I get the problem on the very first attempt to get a connection.
>
> I am definitely getting a DataSource object, it is the call to the
> getConnection() method that is throwing a SQLException with a Resource
> Exception nested within (I had to dig into a running VM to get the
> original message).
>
> Does that particular error message originate from Firebird itself, or
> is this all still within the Java driver complex?
>
> BW
>
> --- In Firebird-Java@y..., David Jencks <davidjencks@d...> wrote:
> > Your code is obviously looking up the DataSource, and it must have
> gotten
> > created more or less successfully. If you don't specify a maxSize you
> > should be able to get 10 simultaneous connections. You might try
> > explicitly specifying the maxsize as another parameter.
> >
> > I don't think this can be a connection string issue since the error
> message
> > comes from a queued semaphore running out of permits. Are you sure
> you get
> > this problem the first 10 times you ask for a connection?
> >
> > You should definitely close the connection in a finally block, or
> you will
> > eventually run out.
> >
> > conn = ds.getConnection();
> > try
> > {
> > ...
> > }
> > finally
> > {
> > conn.close();
> > }
> >
> > david jencks
> >
> > On 2002.04.02 16:25:15 -0500 bradenw2 wrote:
> > > Oops. I pasted the wrong version of the server.xml file. Those
> > > "jdbc/KatanaDB" should read "java:/KatanaDB".
> > >
> > > BW
> > >
> > >
> > > --- In Firebird-Java@y..., "bradenw2" <braden.walters@s...> wrote:
> > > > (Hopefully THIS post will go through ... sheesh!)
> > > >
> > > > Hello all,
> > > >
> > > > I have been working with the JCA-JDBC in a Tomcat 4 environment,
> and
> > > > am making some progress. However, currently when I try to get a
> > > > database connection, I get a ResourceException with the message
> that
> > > > "No ManagedConnections Available!".
> > > >
> > > > Here is my server.xml file (relevant portions anyway):
> > > >
> > > > <Context path="/katana" docBase="katana" >
> > > > <Resource name="jdbc/KatanaDB" auth="Container"
> > > > type="org.firebirdsql.FBDataSourceObjectFactory" />
> > > > <ResourceParams name="jdbc/KatanaDB" >
> > > > <parameter>
> > > > <name>factory</name><value>org.firebirdsql.FBDat
> > > > aSourceObjectFactory</value>
> > > > </parameter>
> > > > <parameter>
> > > > <name>User</name><value>SKK</value>
> > > > </parameter>
> > > > <parameter>
> > > > <name>Password</name><value>skk1</value>
> > > > </parameter>
> > > > <parameter>
> > > >
> > >
> > > > <name>DatabaseName</name><value>localhost/3050:/ex
> > > > port/home/katana/katana.gdb</value>
> > > > </parameter>
> > > > </ResourceParams>
> > > > </Context>
> > > >
> > > > ... and here's the accessing code ...
> > > >
> > > > try
> > > > {
> > > > Context initCtx = (Context) new InitialContext();
> > > > Context ctx = (Context) initCtx.lookup("java:comp/env");
> > > > DataSource ds = (DataSource) ctx.lookup("java:/KatanaDB");
> > > >
> > > > conn = ds.getConnection();
> > > > }
> > > > catch(NamingException ne)
> > > > {
> > > > ne.printStackTrace();
> > > > }
> > > > catch(SQLException sqle)
> > > > {
> > > > sqle.printStackTrace();
> > > > }
> > > >
> > > > ... and finally the relevant portion of the web.xml file ...
> > > >
> > > > <resource-ref>
> > > > <description>
> > > > Object Factory Reference to the registration DataSource.
> > > > </description>
> > > > <res-ref-name>
> > > > java:/KatanaDB
> > > > </res-ref-name>
> > > > <res-type>
> > > > javax.sql.DataSource
> > > > </res-type>
> > > > <res-auth>
> > > > Container
> > > > </res-auth>
> > > > </resource-ref>
> > > >
> > > > Any idea what I am missing?
> > > > Thanks in advance!
> > > >
> > > > Braden Walters
> > >
> > >
> > >
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> > >
> > >
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