Re: Can't connect to X11 window server using '0:0' as the value of the display and now java.awt.HeadlessException
Hi all, It have been a long time since I read any post... but I can't ignore someone in trouble. I had a similar problem using java.AWT with linux... It needs a graphics system server, like windows or X11 running in your server. But as X11 was too heavy for my system, my workaround was to start Xvfb (X virtual frame buffer). Google it to get a Solaris Xvfb... take a look also at http://developer.java.sun.com/developer/bugParade/bugs/4281163.html Regards, miagi On Sun, 23 Mar 2003 12:15:04 -0800, Micael <[EMAIL PROTECTED]> escreveu : > De: Micael <[EMAIL PROTECTED]> > Data: Sun, 23 Mar 2003 12:15:04 -0800 > Para: "Tomcat Users List" <[EMAIL PROTECTED]> > Assunto: Re: Can't connect to X11 window server using '0:0' as the value of the > display and now java.awt.HeadlessException > > The material George gave you is really good. Do you have X11 installed, > even if not running? I am not a Solaris guy, so don't know what that may > mean in that context. > > At 09:09 AM 3/23/03 +, you wrote: > > >Thanks Micael. Tried the same thing and got the same results. > >Looks like Catalina/Tomcat is indeed using headless mode but > >it's not working with my Java (1.4) and operating system (SunOS 5.6). > >I'm presuming you're using this to create/generate graphics in a > >servlet ? Do you mind posting sample Java that creates a > >Toolkit or MediaTracker (and which therefore requires headless > >mode) ? I can't fathom what's wrong with mine. Mine works fine > >when running on Win2K and Tomcat, but now dying on Sun. > >Thanks for the help, > >Stephen. > > > > Micael <[EMAIL PROTECTED]> wrote: > >I added the headless flag to catalina.sh as follows: > > > ># - Execute The Requested Command > >- > > > >echo "Using CATALINA_BASE: $CATALINA_BASE" > >echo "Using CATALINA_HOME: $CATALINA_HOME" > >echo "Using CATALINA_TMPDIR: $CATALINA_TMPDIR" > >echo "Using JAVA_HOME: $JAVA_HOME" > > > >if [ "$1" = "jpda" ] ; then > >if [ -z "$JPDA_ADDRESS" ]; then > >JPDA_ADDRESS="8000" > >fi > >if [ -z "$JDPA_OPTS" ]; then > >JPDA_OPTS="-Xdebug > >-Xrunjdwp:transport=dt_socket,address=$JPDA_ADDRESS,server=y,suspend=n" > >fi > >CATALINA_OPTS="$CATALINA_OPTS $JPDA_OPTS" > >shift > >fi > >CATALINA_OPTS="-Djava.awt.headless=true" > > > >This worked fine. > > > > > >At 08:15 AM 3/23/03 +, you wrote: > > > > > > On Thu, 2003-03-20 at 20:36, Micael wrote: > > > > For me the easiest thing was just to provide the right command line > > > options > > > > (java.awt.headless=true) when I started up Tomcat. > > >May I ask, how you did this ? I've also encountered > > >JNI_OnLoad errors runing on Solaris due, I suspect, the lack of > > >XWindows on my server. I tried adding the headless flag to > > >my catalina.sh script as follows ~ > > >elif [ "$1" = "start" ] ; then > > > shift > > > touch "$CATALINA_BASE"/logs/catalina.out > > > if [ "$1" = "-security" ] ; then > > > echo "Using Security Manager" > > > shift > > > "$_RUNJAVA" $JAVA_OPTS $CATALINA_OPTS \ > > > -Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" \ > > > -Djava.security.manager \ > > > -Djava.security.policy=="$CATALINA_BASE"/conf/catalina.policy \ > > > -Dcatalina.base="$CATALINA_BASE" \ > > > -Dcatalina.home="$CATALINA_HOME" \ > > > -Djava.io.tmpdir="$CATALINA_TMPDIR" \ > > > -Djava.awt.headless=true \ > > > org.apache.catalina.startup.Bootstrap "$@" start \ > > > >> "$CATALINA_BASE"/logs/catalina.out 2>&1 & > > > else > > > "$_RUNJAVA" $JAVA_OPTS $CATALINA_OPTS \ > > > -Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" \ > > > -Dcatalina.base="$CATALINA_BASE" \ > > > -Dcatalina.home="$CATALINA_HOME" \ > > > -Djava.io.tmpdir="$CATALINA_TMPDIR" \ > > > -Djava.awt.headless=true \ > > > org.apache.catalina.startup.Bootstrap "$@" start \ > > > >> "$CATALINA_BASE"/logs/catalina.out 2>&1 & > > > fi > > >But that just resulted in the fo
Re: Can't connect to X11 window server using '0:0' as the value of the display and now java.awt.HeadlessException
The material George gave you is really good. Do you have X11 installed,
even if not running? I am not a Solaris guy, so don't know what that may
mean in that context.
At 09:09 AM 3/23/03 +, you wrote:
Thanks Micael. Tried the same thing and got the same results.
Looks like Catalina/Tomcat is indeed using headless mode but
it's not working with my Java (1.4) and operating system (SunOS 5.6).
I'm presuming you're using this to create/generate graphics in a
servlet ? Do you mind posting sample Java that creates a
Toolkit or MediaTracker (and which therefore requires headless
mode) ? I can't fathom what's wrong with mine. Mine works fine
when running on Win2K and Tomcat, but now dying on Sun.
Thanks for the help,
Stephen.
Micael <[EMAIL PROTECTED]> wrote:
I added the headless flag to catalina.sh as follows:
# - Execute The Requested Command
-
echo "Using CATALINA_BASE: $CATALINA_BASE"
echo "Using CATALINA_HOME: $CATALINA_HOME"
echo "Using CATALINA_TMPDIR: $CATALINA_TMPDIR"
echo "Using JAVA_HOME: $JAVA_HOME"
if [ "$1" = "jpda" ] ; then
if [ -z "$JPDA_ADDRESS" ]; then
JPDA_ADDRESS="8000"
fi
if [ -z "$JDPA_OPTS" ]; then
JPDA_OPTS="-Xdebug
-Xrunjdwp:transport=dt_socket,address=$JPDA_ADDRESS,server=y,suspend=n"
fi
CATALINA_OPTS="$CATALINA_OPTS $JPDA_OPTS"
shift
fi
CATALINA_OPTS="-Djava.awt.headless=true"
This worked fine.
At 08:15 AM 3/23/03 +, you wrote:
> > On Thu, 2003-03-20 at 20:36, Micael wrote:
> > For me the easiest thing was just to provide the right command line
> options
> > (java.awt.headless=true) when I started up Tomcat.
>May I ask, how you did this ? I've also encountered
>JNI_OnLoad errors runing on Solaris due, I suspect, the lack of
>XWindows on my server. I tried adding the headless flag to
>my catalina.sh script as follows ~
>elif [ "$1" = "start" ] ; then
> shift
> touch "$CATALINA_BASE"/logs/catalina.out
> if [ "$1" = "-security" ] ; then
> echo "Using Security Manager"
> shift
> "$_RUNJAVA" $JAVA_OPTS $CATALINA_OPTS \
> -Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" \
> -Djava.security.manager \
> -Djava.security.policy=="$CATALINA_BASE"/conf/catalina.policy \
> -Dcatalina.base="$CATALINA_BASE" \
> -Dcatalina.home="$CATALINA_HOME" \
> -Djava.io.tmpdir="$CATALINA_TMPDIR" \
> -Djava.awt.headless=true \
> org.apache.catalina.startup.Bootstrap "$@" start \
> >> "$CATALINA_BASE"/logs/catalina.out 2>&1 &
> else
> "$_RUNJAVA" $JAVA_OPTS $CATALINA_OPTS \
> -Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" \
> -Dcatalina.base="$CATALINA_BASE" \
> -Dcatalina.home="$CATALINA_HOME" \
> -Djava.io.tmpdir="$CATALINA_TMPDIR" \
> -Djava.awt.headless=true \
> org.apache.catalina.startup.Bootstrap "$@" start \
> >> "$CATALINA_BASE"/logs/catalina.out 2>&1 &
> fi
>But that just resulted in the following error,
>java.awt.HeadlessException
> at
> java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:121)
> at java.awt.Window.(Window.java:266)
> at java.awt.Frame.(Frame.java:398)
> at java.awt.Frame.(Frame.java:363)
> at ImageUtils.loadImage(Unknown Source)
>
>where the loadImage() function is simply supposed to load an image,
> public static Image loadImage(String fileName) {
> Image image = Toolkit.getDefaultToolkit().getImage(fileName);
> MediaTracker mediaTracker = new MediaTracker(new Frame());
> mediaTracker.addImage(image, 0);
> try {
> mediaTracker.waitForID(0);
> }
> catch (InterruptedException ie) {
> //
> }
> return image;
> }
>Any ideas/help would be great.
>Stephen.
>ps. I also tried PJA but couldn't get that to work either :(
>
>
>
>
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Re: Can't connect to X11 window server using '0:0' as the value of the display and now java.awt.HeadlessException
Here are two uses, if they are of help. I am using Red Hat 7.2 Linux.
FIRST:
public JPEGEncoder(Image image, int quality, OutputStream out) {
MediaTracker tracker = new MediaTracker(this);
tracker.addImage(image, 0);
try {
tracker.waitForID(0);
} catch (InterruptedException e) {
}
/* Quality of the image.
* 0 to 100 and from bad image quality, high compression
to good
* image quality low compression*/
this.quality = quality;
/* Getting picture information
* It takes the Width, Height and RGB scans of the image. */
info= new JPEGInfo(image);
imageHeight = info.imageHeight;
imageWidth = info.imageWidth;
outStream = new BufferedOutputStream(out);
dct = new JPEGDCT(quality);
huffman = new JPEGConvert(imageWidth,imageHeight);
}
SECOND:
public class JPEGCompression {
/* The parameter element compressionQuality is the compression
(compressionQuality) from
* 0 to 100. */
public void compress(String inputImage, String outputImage, String
compressionQuality) {
FileOutputStream dataOut = null;
int compression = 80;
File outputFile = new File(outputImage);
int i = 1;
// Makes sure there are no duplicates
while (outputFile.exists()) {
outputFile = new File(outputImage.substring(0,
outputImage.lastIndexOf(".")) + (i++) + ".jpg");
}
File inputFile = new File(inputImage);
if (inputFile.exists()) {
try {
dataOut = new FileOutputStream(outputFile);
} catch(IOException e) {}
try {
compression =
Integer.parseInt(compressionQuality);
} catch (NumberFormatException e) {
e.printStackTrace();
}
Image image =
Toolkit.getDefaultToolkit().getImage(inputImage);
JPEGEncoder encoder = new JPEGEncoder(image,
compression, dataOut);
encoder.compress();
try {
dataOut.close();
} catch(IOException e) {}
} else {
throw new IllegalArgumentException("We couldn't
find " + inputImage + ". Is it in another directory?");
}
}
}
At 09:09 AM 3/23/03 +, you wrote:
Thanks Micael. Tried the same thing and got the same results.
Looks like Catalina/Tomcat is indeed using headless mode but
it's not working with my Java (1.4) and operating system (SunOS 5.6).
I'm presuming you're using this to create/generate graphics in a
servlet ? Do you mind posting sample Java that creates a
Toolkit or MediaTracker (and which therefore requires headless
mode) ? I can't fathom what's wrong with mine. Mine works fine
when running on Win2K and Tomcat, but now dying on Sun.
Thanks for the help,
Stephen.
Micael <[EMAIL PROTECTED]> wrote:
I added the headless flag to catalina.sh as follows:
# - Execute The Requested Command
-
echo "Using CATALINA_BASE: $CATALINA_BASE"
echo "Using CATALINA_HOME: $CATALINA_HOME"
echo "Using CATALINA_TMPDIR: $CATALINA_TMPDIR"
echo "Using JAVA_HOME: $JAVA_HOME"
if [ "$1" = "jpda" ] ; then
if [ -z "$JPDA_ADDRESS" ]; then
JPDA_ADDRESS="8000"
fi
if [ -z "$JDPA_OPTS" ]; then
JPDA_OPTS="-Xdebug
-Xrunjdwp:transport=dt_socket,address=$JPDA_ADDRESS,server=y,suspend=n"
fi
CATALINA_OPTS="$CATALINA_OPTS $JPDA_OPTS"
shift
fi
CATALINA_OPTS="-Djava.awt.headless=true"
This worked fine.
At 08:15 AM 3/23/03 +, you wrote:
> > On Thu, 2003-03-20 at 20:36, Micael wrote:
> > For me the easiest thing was just to provide the right command line
> options
> > (java.awt.headless=true) when I started up Tomcat.
>May I ask, how you did this ? I've also encountered
>JNI_OnLoad errors runing on Solaris due, I suspect, the lack of
>XWindows on my server. I tried adding the headless flag to
>my catalina.sh script as follows ~
>elif [ "$1" = "start" ] ; then
> shift
> touch "$CATALINA_BASE"/logs/catalina.out
> if [ "$1" = "-security" ] ; then
> echo "Using Security Manager"
> shift
> "$_RUNJAVA" $JAVA_OPTS $CATALINA_OPTS \
> -Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" \
> -Djava.security.manager \
> -Djava.security.policy=="$CATALINA_BASE"/conf/catalina.policy \
> -Dcatalina.base="$CATALINA_BASE" \
> -Dcatalina.home="$CATALINA_HOME" \
> -Djava.io.tmpdir="$CATALINA_TMPDIR" \
> -Djava.awt.headless=true \
> org.apache.catalina.startu
Re: Can't connect to X11 window server using '0:0' as the value of the display and now java.awt.HeadlessException
Thanks Micael. Tried the same thing and got the same results.
Looks like Catalina/Tomcat is indeed using headless mode but
it's not working with my Java (1.4) and operating system (SunOS 5.6).
I'm presuming you're using this to create/generate graphics in a
servlet ? Do you mind posting sample Java that creates a
Toolkit or MediaTracker (and which therefore requires headless
mode) ? I can't fathom what's wrong with mine. Mine works fine
when running on Win2K and Tomcat, but now dying on Sun.
Thanks for the help,
Stephen.
Micael <[EMAIL PROTECTED]> wrote:
I added the headless flag to catalina.sh as follows:
# - Execute The Requested Command -
echo "Using CATALINA_BASE: $CATALINA_BASE"
echo "Using CATALINA_HOME: $CATALINA_HOME"
echo "Using CATALINA_TMPDIR: $CATALINA_TMPDIR"
echo "Using JAVA_HOME: $JAVA_HOME"
if [ "$1" = "jpda" ] ; then
if [ -z "$JPDA_ADDRESS" ]; then
JPDA_ADDRESS="8000"
fi
if [ -z "$JDPA_OPTS" ]; then
JPDA_OPTS="-Xdebug
-Xrunjdwp:transport=dt_socket,address=$JPDA_ADDRESS,server=y,suspend=n"
fi
CATALINA_OPTS="$CATALINA_OPTS $JPDA_OPTS"
shift
fi
CATALINA_OPTS="-Djava.awt.headless=true"
This worked fine.
At 08:15 AM 3/23/03 +, you wrote:
> > On Thu, 2003-03-20 at 20:36, Micael wrote:
> > For me the easiest thing was just to provide the right command line
> options
> > (java.awt.headless=true) when I started up Tomcat.
>May I ask, how you did this ? I've also encountered
>JNI_OnLoad errors runing on Solaris due, I suspect, the lack of
>XWindows on my server. I tried adding the headless flag to
>my catalina.sh script as follows ~
>elif [ "$1" = "start" ] ; then
> shift
> touch "$CATALINA_BASE"/logs/catalina.out
> if [ "$1" = "-security" ] ; then
> echo "Using Security Manager"
> shift
> "$_RUNJAVA" $JAVA_OPTS $CATALINA_OPTS \
> -Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" \
> -Djava.security.manager \
> -Djava.security.policy=="$CATALINA_BASE"/conf/catalina.policy \
> -Dcatalina.base="$CATALINA_BASE" \
> -Dcatalina.home="$CATALINA_HOME" \
> -Djava.io.tmpdir="$CATALINA_TMPDIR" \
> -Djava.awt.headless=true \
> org.apache.catalina.startup.Bootstrap "$@" start \
> >> "$CATALINA_BASE"/logs/catalina.out 2>&1 &
> else
> "$_RUNJAVA" $JAVA_OPTS $CATALINA_OPTS \
> -Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" \
> -Dcatalina.base="$CATALINA_BASE" \
> -Dcatalina.home="$CATALINA_HOME" \
> -Djava.io.tmpdir="$CATALINA_TMPDIR" \
> -Djava.awt.headless=true \
> org.apache.catalina.startup.Bootstrap "$@" start \
> >> "$CATALINA_BASE"/logs/catalina.out 2>&1 &
> fi
>But that just resulted in the following error,
>java.awt.HeadlessException
> at
> java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:121)
> at java.awt.Window.(Window.java:266)
> at java.awt.Frame.(Frame.java:398)
> at java.awt.Frame.(Frame.java:363)
> at ImageUtils.loadImage(Unknown Source)
>
>where the loadImage() function is simply supposed to load an image,
> public static Image loadImage(String fileName) {
> Image image = Toolkit.getDefaultToolkit().getImage(fileName);
> MediaTracker mediaTracker = new MediaTracker(new Frame());
> mediaTracker.addImage(image, 0);
> try {
> mediaTracker.waitForID(0);
> }
> catch (InterruptedException ie) {
> //
> }
> return image;
> }
>Any ideas/help would be great.
>Stephen.
>ps. I also tried PJA but couldn't get that to work either :(
>
>
>
>
>-
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>your needs
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privileged. This information is intended only for the use of the
individual or entity to whom this electronic mail transmission was sent as
indicated above. If you are not the intended recipient, any disclosure,
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information contained in this transmission is strictly prohibited. If you
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Re: Can't connect to X11 window server using '0:0' as the value of the display and now java.awt.HeadlessException
I added the headless flag to catalina.sh as follows:
# - Execute The Requested Command -
echo "Using CATALINA_BASE: $CATALINA_BASE"
echo "Using CATALINA_HOME: $CATALINA_HOME"
echo "Using CATALINA_TMPDIR: $CATALINA_TMPDIR"
echo "Using JAVA_HOME: $JAVA_HOME"
if [ "$1" = "jpda" ] ; then
if [ -z "$JPDA_ADDRESS" ]; then
JPDA_ADDRESS="8000"
fi
if [ -z "$JDPA_OPTS" ]; then
JPDA_OPTS="-Xdebug
-Xrunjdwp:transport=dt_socket,address=$JPDA_ADDRESS,server=y,suspend=n"
fi
CATALINA_OPTS="$CATALINA_OPTS $JPDA_OPTS"
shift
fi
CATALINA_OPTS="-Djava.awt.headless=true"
This worked fine.
At 08:15 AM 3/23/03 +, you wrote:
> On Thu, 2003-03-20 at 20:36, Micael wrote:
> For me the easiest thing was just to provide the right command line
options
> (java.awt.headless=true) when I started up Tomcat.
May I ask, how you did this ? I've also encountered
JNI_OnLoad errors runing on Solaris due, I suspect, the lack of
XWindows on my server. I tried adding the headless flag to
my catalina.sh script as follows ~
elif [ "$1" = "start" ] ; then
shift
touch "$CATALINA_BASE"/logs/catalina.out
if [ "$1" = "-security" ] ; then
echo "Using Security Manager"
shift
"$_RUNJAVA" $JAVA_OPTS $CATALINA_OPTS \
-Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" \
-Djava.security.manager \
-Djava.security.policy=="$CATALINA_BASE"/conf/catalina.policy \
-Dcatalina.base="$CATALINA_BASE" \
-Dcatalina.home="$CATALINA_HOME" \
-Djava.io.tmpdir="$CATALINA_TMPDIR" \
-Djava.awt.headless=true \
org.apache.catalina.startup.Bootstrap "$@" start \
>> "$CATALINA_BASE"/logs/catalina.out 2>&1 &
else
"$_RUNJAVA" $JAVA_OPTS $CATALINA_OPTS \
-Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" \
-Dcatalina.base="$CATALINA_BASE" \
-Dcatalina.home="$CATALINA_HOME" \
-Djava.io.tmpdir="$CATALINA_TMPDIR" \
-Djava.awt.headless=true \
org.apache.catalina.startup.Bootstrap "$@" start \
>> "$CATALINA_BASE"/logs/catalina.out 2>&1 &
fi
But that just resulted in the following error,
java.awt.HeadlessException
at
java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:121)
at java.awt.Window.(Window.java:266)
at java.awt.Frame.(Frame.java:398)
at java.awt.Frame.(Frame.java:363)
at ImageUtils.loadImage(Unknown Source)
where the loadImage() function is simply supposed to load an image,
public static Image loadImage(String fileName) {
Image image = Toolkit.getDefaultToolkit().getImage(fileName);
MediaTracker mediaTracker = new MediaTracker(new Frame());
mediaTracker.addImage(image, 0);
try {
mediaTracker.waitForID(0);
}
catch (InterruptedException ie) {
//
}
return image;
}
Any ideas/help would be great.
Stephen.
ps. I also tried PJA but couldn't get that to work either :(
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information belonging to the sender which may be confidential and legally
privileged. This information is intended only for the use of the
individual or entity to whom this electronic mail transmission was sent as
indicated above. If you are not the intended recipient, any disclosure,
copying, distribution, or action taken in reliance on the contents of the
information contained in this transmission is strictly prohibited. If you
have received this transmission in error, please delete the message. Thank
you
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Re: Can't connect to X11 window server using '0:0' as the value of the display and now java.awt.HeadlessException
> On Thu, 2003-03-20 at 20:36, Micael wrote:
> For me the easiest thing was just to provide the right command line options
> (java.awt.headless=true) when I started up Tomcat.
May I ask, how you did this ? I've also encountered
JNI_OnLoad errors runing on Solaris due, I suspect, the lack of
XWindows on my server. I tried adding the headless flag to
my catalina.sh script as follows ~
elif [ "$1" = "start" ] ; then
shift
touch "$CATALINA_BASE"/logs/catalina.out
if [ "$1" = "-security" ] ; then
echo "Using Security Manager"
shift
"$_RUNJAVA" $JAVA_OPTS $CATALINA_OPTS \
-Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" \
-Djava.security.manager \
-Djava.security.policy=="$CATALINA_BASE"/conf/catalina.policy \
-Dcatalina.base="$CATALINA_BASE" \
-Dcatalina.home="$CATALINA_HOME" \
-Djava.io.tmpdir="$CATALINA_TMPDIR" \
-Djava.awt.headless=true \
org.apache.catalina.startup.Bootstrap "$@" start \
>> "$CATALINA_BASE"/logs/catalina.out 2>&1 &
else
"$_RUNJAVA" $JAVA_OPTS $CATALINA_OPTS \
-Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" \
-Dcatalina.base="$CATALINA_BASE" \
-Dcatalina.home="$CATALINA_HOME" \
-Djava.io.tmpdir="$CATALINA_TMPDIR" \
-Djava.awt.headless=true \
org.apache.catalina.startup.Bootstrap "$@" start \
>> "$CATALINA_BASE"/logs/catalina.out 2>&1 &
fi
But that just resulted in the following error,
java.awt.HeadlessException
at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:121)
at java.awt.Window.(Window.java:266)
at java.awt.Frame.(Frame.java:398)
at java.awt.Frame.(Frame.java:363)
at ImageUtils.loadImage(Unknown Source)
where the loadImage() function is simply supposed to load an image,
public static Image loadImage(String fileName) {
Image image = Toolkit.getDefaultToolkit().getImage(fileName);
MediaTracker mediaTracker = new MediaTracker(new Frame());
mediaTracker.addImage(image, 0);
try {
mediaTracker.waitForID(0);
}
catch (InterruptedException ie) {
//
}
return image;
}
Any ideas/help would be great.
Stephen.
ps. I also tried PJA but couldn't get that to work either :(
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Re: Can't connect to X11 window server using '0:0' as the value of the display and now java.awt.HeadlessException
For me the easiest thing was just to provide the right command line options (java.awt.headless=true) when I started up Tomcat. At 02:27 PM 3/20/03 -0500, you wrote: At 07:18 PM 3/20/2003 +, you wrote: ok: there is another solution to the headless thing: (I wrote a graphical servlet that runs on a linux box without X, and had the same problems: The headless seemed to work, well, kinda, but not to my liking): So I went the xvfb route: This is a virtual frame buffer to can install on a linux box that emulates an X session, which then kinda solves all the graphical problems in one step. You set the xvfb to the resolution required and just start and forget about it. Worth I shot, I'd say, and might safe you hours of frustration [It did me ;-) ]. I had tried xvfb and had some difficulties. Any pointers? suggestions? Thanks, Glenn - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] LEGAL NOTICE This electronic mail transmission and any accompanying documents contain information belonging to the sender which may be confidential and legally privileged. This information is intended only for the use of the individual or entity to whom this electronic mail transmission was sent as indicated above. If you are not the intended recipient, any disclosure, copying, distribution, or action taken in reliance on the contents of the information contained in this transmission is strictly prohibited. If you have received this transmission in error, please delete the message. Thank you - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Can't connect to X11 window server using '0:0' as the value of the display and now java.awt.HeadlessException
At 07:59 PM 3/20/2003 +, you wrote:
Difficult to say: What kind of problems?
I start mine using
Xvfb :0 -screen 0 1600x1200x32 &
{I just added it to rc.local }
Will retry with resolution change.
Thanks,
Glenn
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Re: Can't connect to X11 window server using '0:0' as the value of the display and now java.awt.HeadlessException
At 07:18 PM 3/20/2003 +, you wrote: ok: there is another solution to the headless thing: (I wrote a graphical servlet that runs on a linux box without X, and had the same problems: The headless seemed to work, well, kinda, but not to my liking): So I went the xvfb route: This is a virtual frame buffer to can install on a linux box that emulates an X session, which then kinda solves all the graphical problems in one step. You set the xvfb to the resolution required and just start and forget about it. Worth I shot, I'd say, and might safe you hours of frustration [It did me ;-) ]. I had tried xvfb and had some difficulties. Any pointers? suggestions? Thanks, Glenn - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Can't connect to X11 window server using '0:0' as the value of the display and now java.awt.HeadlessException
You using Linux? What is your environment? Anyway, setting the JVM is the
way to go if you are using Linux.
At 06:09 PM 3/20/03 +0100, you wrote:
Hi,
I put System.setProperty("java.awt.headless", "true");
in my servlet init method it's ok, but now when I open a Frame,
I get the exception HeadlessException:
java.awt.HeadlessException
at
java.awt.GraphicsEnvironnement.checkHeadless(GraphicsEnvironement.java:121)
at java.awt.window.(Window.java:226)
at java.awt.Frame.(Frame.java:398)
...
What can I do?
Georges
Chad Johnson wrote:
If I had to wager a guess you'll need to run tomcat in a 'headless' JVM.
To do that add :
-Djava.awt.headless=true
To the :
CATALINA_OPTS
environment variable.
-Chad Johnson
-Original Message-
From: Georges Roux [mailto:[EMAIL PROTECTED] Sent: Tuesday,
March 18, 2003 5:32 PM
To: [EMAIL PROTECTED]
Subject: Can't connect to X11 window server using '0:0' as the value of
the display
Hello everybody,
Hi run Tomcat 4.1.18 Standalone on Linux debian(sid)and use
J2sdk1.4.1_01.
I have a servlet which manipulate exif informations in jpg images. it
works well but when I try to run it on tomcat it fails (error 500)
I have the following error:
"Can't connect to X11 window server using '0:0' as the value of the
display"
What can I do?
Georges
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--
18:54 18:54 connard
18:55 18:54 t'as que ca a faire? ;)
18:56 18:55 je m'ennuies ferme ouais ! encore 5mn avant la fin du taf,
donc j'en profite pour passer dans les fortunes :)
+==+
| |
| Georges Roux|
| URL : georgesroux.pacageek.org |
| email : [EMAIL PROTECTED]|
| mobile : +33 (0) 613977573 |
+==+
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This electronic mail transmission and any accompanying documents contain
information belonging to the sender which may be confidential and legally
privileged. This information is intended only for the use of the
individual or entity to whom this electronic mail transmission was sent as
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information contained in this transmission is strictly prohibited. If you
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you
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RE: Can't connect to X11 window server using '0:0' as the value of the display and now java.awt.HeadlessException
Hey,
From the 1.4.x api docs:
"HeadlessException: Thrown when code that is dependent on a keyboard,
display, or mouse is called in an environment that does not support a
keyboard, display, or mouse."
That Frame seems to be the culprit of this.
-Chad Johnson
-Original Message-
From: Georges Roux [mailto:[EMAIL PROTECTED]
Sent: Thursday, March 20, 2003 11:09 AM
To: Tomcat Users List
Subject: Re: Can't connect to X11 window server using '0:0' as the value
of the display and now java.awt.HeadlessException
Hi,
I put System.setProperty("java.awt.headless", "true");
in my servlet init method it's ok, but now when I open a Frame, I get
the exception HeadlessException:
java.awt.HeadlessException
at
java.awt.GraphicsEnvironnement.checkHeadless(GraphicsEnvironement.java:1
21)
at java.awt.window.(Window.java:226)
at java.awt.Frame.(Frame.java:398)
...
What can I do?
Georges
Chad Johnson wrote:
>If I had to wager a guess you'll need to run tomcat in a 'headless'
>JVM. To do that add :
>
>-Djava.awt.headless=true
>
>To the :
>
>CATALINA_OPTS
>
>environment variable.
>
>-Chad Johnson
>
>-Original Message-
>From: Georges Roux [mailto:[EMAIL PROTECTED]
>Sent: Tuesday, March 18, 2003 5:32 PM
>To: [EMAIL PROTECTED]
>Subject: Can't connect to X11 window server using '0:0' as the value of
>the display
>
>
>Hello everybody,
>
>Hi run Tomcat 4.1.18 Standalone on Linux debian(sid)and use
>J2sdk1.4.1_01.
>
>I have a servlet which manipulate exif informations in jpg images. it
>works well but when I try to run it on tomcat it fails (error 500)
>
>I have the following error:
>"Can't connect to X11 window server using '0:0' as the value of the
>display"
>
>What can I do?
>
>Georges
>
>
>-
>To unsubscribe, e-mail: [EMAIL PROTECTED]
>For additional commands, e-mail: [EMAIL PROTECTED]
>
>
>
>
>-
>To unsubscribe, e-mail: [EMAIL PROTECTED]
>For additional commands, e-mail: [EMAIL PROTECTED]
>
>
>
--
18:54 18:54 connard
18:55 18:54 t'as que ca a faire? ;)
18:56 18:55 je m'ennuies ferme ouais ! encore 5mn avant la fin du taf,
donc j'en profite pour passer dans les fortunes :)
+==+
| |
| Georges Roux|
| URL : georgesroux.pacageek.org |
| email : [EMAIL PROTECTED]|
| mobile : +33 (0) 613977573 |
+==+
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To unsubscribe, e-mail: [EMAIL PROTECTED]
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