Re: Platform-Problems with the jdbc:postgresql Driver

On Thu, 30 Apr 1998, C. Schmidt wrote:

> I sent the foolowing mail to the mailinglist, but got no answer at all.
> (Something wrong with the mailinglist ?)

Not that I know of (I'm receiving mail here from the lists. What
address(s) are you using?

As for JDBC, you don't say which version of postgresql are you using?

Do you get any exceptions thrown by the driver? If so, what are they?

To get the driver running under Windows 95, all you need to do is
to ensure that your Windows95 machines IP addrfess is in the
${PGDATA}/pg_hba.conf file on the server. This file defines what
databases a client machine can have access to, and what authentication
scheme to use.

Now near the end of the message, you say a Null pointer is thrown on
getConnection. Any chance of a stack trace?

In the past when this has happened with getConnection(), it was due to
null being passed for the password.

>
> Please read the mail completely and give me an answer.
> Thanks cs
>
>
> (The foolowing was the answer from Sun)
> Subject:
> Re: Configuration or platformspecific problem with jdbc?
> Date:
> Tue, 28 Apr 1998 17:36:12 -0700
> From:
> Seth(dot)White(at)Eng(dot)Sun(dot)COM (Seth White)
> To:
> cs(dot)hilzingen(at)swol(dot)de
>
>
> Hi.
>
> There are no special requirements for W95.
>
> Seth
>
> > From ChristophSchmidt(at)swol(dot)de Tue Apr 28 05:30:26 1998
> > MIME-Version: 1.0
> > To: jdbc(at)wombat(dot)eng(dot)sun(dot)com
> > Subject: Configuration or platformspecific problem with jdbc?
> > Content-Transfer-Encoding: 7bit
> >
> > I don't know, if you know PostgreSQL, but it works with Linux and it's
> > jdbc-driver also works with Linux.
> > The problem is :
> > The postmaster-process waits on a tcp/ip port and accepts connections
> > if they come from ^^^^^^^^^^^^^^^^^^^
> > a) jdk1.1.3 from Linux (jdbc:postgresql://host:5432/database)
> > b) telnet <host> from Windows95 (DOS-Shell) this overrides telnets inner
> > defaults, so you can set telnet in the services - file to port 5432
> > (for testing only) the sense is, you see that the postmaster gets data.
> > Wrong data but data.
> >
> > c) jdk1.1.1 from Windows 95 with the jdbc:postgresql:...
> > gets newer a connection to the postmaster-process on Linux.
> > In the test output of the postmaster is nothing (nothing like b) or so.)
> >
> > In your Documentation i found nothing about anything to configure for
> > W95 .... jdbc-Driver (jdbcDOC).
> >
> > Is there anything special to configure ?
> >
> > The other possibilty is that the driver has operatingsystem specific
> > code, but it is all java-code and seems nothing special.
> >
> > I would like to do more with java ( especialy crossplattform) but this
> > example stops me.
> >
> > Please give me a tip.
> >
> > Thanks Christoph Schmidt
> >
> > By the way the unspecific error message you get in those cases is
> > a NullPointerException on db = DriverManager.getConnection(url, usr,
> > pwd);
> >
> >
>

--
Peter T Mount peter(at)retep(dot)org(dot)uk or petermount(at)earthling(dot)net
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