Re: forName finds Driver but getConnection doesn't - Mailing list pgsql-jdbc

I run my program with

java -cp /usr/java/jdk/jre/lib/ext/postgresql.jar:.
-Djdbc.drivers=org.postgresql.Driver MyProgram

By the way, I had a temporary typo in the sourceURL that shows up in
the stack trace (jdbc:postgres://host:database instead of
host/database) but that was only temporary.


--- Haris Peco <snpe@snpe.co.yu> wrote:
> On Wednesday 20 November 2002 04:20 pm, Dennis King wrote:
> > --- Haris Peco <snpe@snpe.co.yu> wrote:
> > > On Tuesday 19 November 2002 11:46 pm, Dennis King wrote:
> > > > Hi All. I can't get to my carefully set-up database through
> java
> > >
> > > with
> > >
> > > > a simple test program. I think I've hit most of the required
> > >
> > > set-up
> > >
> > > > points:
> > > >
> > > > * I've got all the postgresql packages installed (checked
> with
> > >
> > > rpm
> > >
> > > > -qa | grep -i postgres; they're there, including the jdbc
> one).
> > > > * I set tcpip_socket = true in
> > >
> > > /var/lib/pgsql/data/postgresql.conf.
> > >
> > > > * I also updated /etc/rc.d/init.d/ so that postmaster gets -o
> > >
> > > "-i";
> > >
> > > > this means that the "pg_ctl -D /var/lib/pgsql/data status"
> > >
> > > command
> > >
> > > > shows the -i flag was passed in.
> > > > * I have the right driver in the classpath (I pass in
> -classpath
> > > > /usr/share/pgsql/pgjdbc2.jar when compiling and running; for
> some
> > > > reason, copying the jar to /jre/lib/ext doesn't work with any
> > >
> > > jars
> > >
> > > > for me).
> > > > * I added the lines "host all 127.0.0.1 255.255.255.255
> trust"
> > >
> > > and
> > >
> > > > "host all 192.168.0.0 255.255.0.0 trust" to
> > > > /var/lib/pgsql/data/pg_hba.conf
> > > > * I created a new database, "webdb"
> > > > * I added the user "xxx" with the password "yyy" to the
> database,
> > >
> > > and
> > >
> > > > verified by logging into psql with -U xxx (had pg_hba.conf
> set to
> > > > password so was challenged and succeeded)
> > > >
> > > > With all of this, my java program has these lines:
> > > >
> > > > Connection dbConnection = null;
> > > > try{
> > > > Class.forName("org.postgresql.Driver");
> > > > dbConnection =
> > >
> > > DriverManager.getConnection("jdbc:postgresql:webdb",
> > >
> > > > "xxx", "yyy");
> > > > }
> > > >
> > > > I get the error "java.sql.SQLException: Driver not found for
> URL:
> > > > jdbc:postgresql:webdb". (Note it's finding the driver with
> the
> > > > forName() method call).
> > > >
> > > > I've tried using jdbc:postgresql://localhost/webdb.
> > > >
> > > > I have, of course, restarted the box several times.
> > > >
> > > > Any pointers you have would be extremely gratefully received.
> > >
> > > Hello Dennis,
> > >   jdbc:postgresql:webdb is not good URL
> > > If you database webdb and server localhost then second URL is
> good
> > > and problem is in TCP connection - what is your port ?
> > >
> > > regards
> > > Haris Peco
> >
> > Haris et al.,
> >
> > I never specified a port in the install, so Postgresql should be
> > running on the default port, 5432. I did uncomment the line in
> the
> > .conf file (all lines seem to be commmented out by default). (By
> the
> > way, my .conf file has all lines commented out, which I presume
> means
> > that it's just operating on the defaults. Is there any chance my
> > firewall (default product shipped with Red Hat 8) would be
> > interfering with the communication?
> >
> > Just in case it helps, the SQLException stack trace is this:
> >
> > java.sql.SQLException: Driver not found for URL:
> > jdbc:postgresql://localhost:webdb
> >    at 0x4028115f: java.lang.Throwable.Throwable(java.lang.String)
> > (/usr/lib/libgcj.so.3)
> >    at 0x402740d2: java.lang.Exception.Exception(java.lang.String)
> > (/usr/lib/libgcj.so.3)
> >    at 0x40316294:
> > java.sql.SQLException.SQLException(java.lang.String,
> > java.lang.String, int) (/usr/lib/libgcj.so.3)
> >    at 0x40316244:
> > java.sql.SQLException.SQLException(java.lang.String)
> > (/usr/lib/libgcj.so.3)
> >    at 0x40316102:
> > java.sql.DriverManager.getConnection(java.lang.String,
> > java.util.Properties) (/usr/lib/libgcj.so.3)
> >    at 0x4031603a:
> > java.sql.DriverManager.getConnection(java.lang.String,
> > java.lang.String, java.lang.String) (/usr/lib/libgcj.so.3)
> >    at 0x4039d347: ffi_call_SYSV (/usr/lib/libgcj.so.3)
> >    at 0x4039d307: ffi_raw_call (/usr/lib/libgcj.so.3)
> >    at 0x40248528:
> > _Jv_InterpMethod.continue1(_Jv_InterpMethodInvocation)
> > (/usr/lib/libgcj.so.3)
> >    at 0x40248e34: _Jv_InterpMethod.run(ffi_cif, void, ffi_raw,
> > _Jv_InterpMethodInvocation) (/usr/lib/libgcj.so.3)
> >    at 0x40246424: _Jv_InterpMethod.run_normal(ffi_cif, void,
> ffi_raw,
> > void) (/usr/lib/libgcj.so.3)
> >    at 0x4039d1bc: ?? (??:0)
> >    at 0x4025b308: gnu.gcj.runtime.FirstThread.call_main()
> > (/usr/lib/libgcj.so.3)   at 0x402c60b1:
> > gnu.gcj.runtime.FirstThread.run() (/usr/lib/libgcj.so.3)
> >    at 0x40267fdc: _Jv_ThreadRun(java.lang.Thread)
> > (/usr/lib/libgcj.so.3)
> >    at 0x4023478c: _Jv_RunMain(java.lang.Class, byte const, int,
> byte
> > const, boolean) (/usr/lib/libgcj.so.3)
> >    at 0x08048900: __gcj_personality_v0
> > (jdbc.driver=org.postgresql.Driver)
> >    at 0x420158d4: __libc_start_main
> > (jdbc.driver=org.postgresql.Driver)
> >    at 0x080486c1: _Jv_RegisterClasses
> > (jdbc.driver=org.postgresql.Driver)
> > java.sql.SQLException: Driver not found for URL:
> > jdbc:postgresql://localhost:webdb
> >
> >
> Is it postgresl.jar in CLASSPATH ?


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