From: mark81 at gmail.com (Mark Mitchell)
Date: Tue, 31 Oct 2006 13:31:14 -0400
Subject: [Pljava-dev] org.postgresql.pljava.internal.ServerException
	running linux headless mode
In-Reply-To: <454780C2.3090705@softhome.net>
References: <45477960.5070604@softhome.net> <45477A99.1000605@tada.se>
	<454780C2.3090705@softhome.net>
Message-ID: <449f4cf70610310931ga4a6effue5153525c4fd7534@mail.gmail.com>

Have you tried writing a simple java class to run just to make sure
headless works outside of pljava?

This class will do the check:

import javax.swing.*;

public class HTest {

        public static void main(String[] args) {
                JButton b = new JButton("Testing Headless");
        }
}

If headless is not working, you'll get an exception.  I actually found
that on my CentOS linux box, java.awt.headless was by default set to
true, and therefore I only got the link exception when running with
-Djava.awt.headless=false.

-Mark

On 10/31/06, Scott Petersen <scottpetersen at softhome.net> wrote:
> Thomas Hallgren wrote:
> > Scott Petersen wrote:
> >> Supportive helpers,
> >>
> >> I am running Postgresql 8.1.3 on a Linux machine and attempting to
> >> execute some Java code that needs to access libawt.so in headless
> >> mode.  After looking at the page
> >> http://wiki.tada.se/wiki/display/pljava/Module+Configuration I do not
> >> seem to find a way to do this.  In reviewing the page
> >> http://forum.java.sun.com/thread.jspa?threadID=760969&start=105 it
> >> instructs me to start java with "-Djava.awt.headless=true".  I need
> >> some direction on how to accomplish this task.
> >>
> > Did you try adding:
> >
> >  pljava.vmoptions = '-Djava.awt.headless=true'
> >
> > to the postgresql.conf file?
> >
> > Regards,
> > Thomas Hallgren
> >
> >
> Thomas,
>
> Thanks for the information.  I thought that I had set this previously,
> but in order to verify that this was the case I checked my
> postgresql.conf file and it contains the following:
>
> #---------------------------------------------------------------------------
> # CUSTOMIZED OPTIONS
> #---------------------------------------------------------------------------
>
> custom_variable_classes = 'pljava'              # list of custom
> variable class names
> pljava.classpath='/usr/local/pljava/pljava.jar'
> pljava.statement_cache_size=10
> pljava.release_lingering_savepoints = true
> pljava.vmoptions = '-Djava.awt.headless=true'
> pljava.debug = false
>
>
>
> I then stopped postgresql and then restarted postgresql.  I then reran
> my application with the same error result.
>
> Any further help would be appreciated..
>
> Scott.
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