Can't connect to X11
Hi All, I found this error : java.lang.InternalError: Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable. on UNIX platform. Please adv. Thanks Regards - IN - --- Antony GUILLOTEAU [EMAIL PROTECTED] wrote: I wanted to simulate a CLIENt-CERT realm to the browser with serlvet (response.setHeader(WWW-Authenticate, BASIC realm=\myName\)) but it seems not possible. So I want to basically redirect my request to SSL. I wish know how to redirect a request to the secure port within a serlvet but I don't want use init-parameter in the web.xml and so one. Thanks __ Yahoo! Mail - PC Magazine Editors' Choice 2005 http://mail.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Can't connect to X11
You are not supposed to use awt or swing on a java web server. remove calls to awt/swing or use headless java. Iin Nurhidayat a écrit : Hi All, I found this error : java.lang.InternalError: Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable. on UNIX platform. Please adv. Thanks Regards - IN - --- Antony GUILLOTEAU [EMAIL PROTECTED] wrote: I wanted to simulate a CLIENt-CERT realm to the browser with serlvet (response.setHeader(WWW-Authenticate, BASIC realm=\myName\)) but it seems not possible. So I want to basically redirect my request to SSL. I wish know how to redirect a request to the secure port within a serlvet but I don't want use init-parameter in the web.xml and so one. Thanks __ Yahoo! Mail - PC Magazine Editors' Choice 2005 http://mail.yahoo.com - 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]
Re: Can't connect to X11
Hi, do you use some graphic functions in your project? If so, you should add the following parameter to Tomcat startup: -Djava.awt.headless=true cu cm Am 22.09.2005 um 09:07 schrieb Iin Nurhidayat: Hi All, I found this error : java.lang.InternalError: Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable. on UNIX platform. Please adv. Thanks Regards - IN - PGP.sig Description: Signierter Teil der Nachricht
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 21
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 21
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
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 21
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 21
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
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 21
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 21
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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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 valueof the display and now java.awt.HeadlessException
Hi,
Here is a good link:
http://www.geocities.com/marcoschmidt.geo/java-image-faq.html#x
Hope you enjoy.
Georges
Stephen Riek 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 21
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 21
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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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]
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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.startup.Bootstrap $@ start \
$CATALINA_BASE/logs/catalina.out 21
else
$_RUNJAVA
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 21
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 21
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
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 21
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 21
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 ofthe 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:121) at java.awt.window.init(Window.java:226) at java.awt.Frame.init(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 | +==+ - 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
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.init(Window.java:226) at java.awt.Frame.init(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 | +==+ - 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]
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.init(Window.java:226) at java.awt.Frame.init(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 | +==+ - 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 ofthe display and now java.awt.HeadlessException
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 ;-) ]. On Thu, 2003-03-20 at 18:34, Micael wrote: 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.init(Window.java:226) at java.awt.Frame.init(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 | +==+ - 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] -- p niemandt [EMAIL PROTECTED] - 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 07:18 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 ofthe display and now java.awt.HeadlessException
Difficult to say: What kind of problems?
I start mine using
Xvfb :0 -screen 0 1600x1200x32
{I just added it to rc.local }
On Thu, 2003-03-20 at 19:27, Glenn Parsons 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
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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 07:59 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
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 ofthe display and now java.awt.HeadlessException
Hi, Another common (Java) solution is to install PJA Toolkit: PJA (Pure Java AWT) Toolkit is a JavaTM library for drawing graphics developed by eTeks. It is 100% Pure Java and doesn't use any native graphics resource of the system on which the Java Virtual Machine runs. java.awt.Graphics methods such as drawLine (), fillOval (), drawString (),... are implemented in the default JVM with native graphical functions (except in some cases for Java2D) : That means that drawLine () finally calls a GDI system function on Windows or X11 function on a X11/UNIX machine even if the drawing is done in an off-screen image using the class java.awt.Image. This ensures the best performance for drawing graphics with Java. But in a few cases, this default behavior can cause problems that PJA library improves : When no X11 Display is available on a UNIX machine (also called headless environment) or when GDI resources are low on Windows, it is impossible to compute off-screen images with java.awt.Graphics methods under a JDK version 1.4, even if your program doesn't need to display these images. Typically, this situation happens for servlets returning dynamically generated images like pies, charts or web counters. With PJA, you don't need to change your Java programs that you expected to run : setting java.awt system property to com.eteks.awt.PJAToolkit is the only required modification to your program with Java 1.1 (see PJA FAQ and com.eteks.awt.PJAToolkit class documentation for more information). It is also impossible to compute off-screen images when the Java security manager forbids access to any Toolkit or the AWT library. In that case you can although create an instance of com.eteks.awt.PJAImage class which extends java.awt.Image, and draw into it with graphics methods. Drawing with native function doesn't give always the exact same results for each pixel on all platforms. For example, SansSerif font renders differently on MacOS, Windows and other systems : each letter of this font isn't drawn the same, and is different if font anti-aliasing is set or not on the system. On MacOS, circles aren't rendered as specified in Java documentation : fillArc () and drawArc () don't use the same base ellipse... Finally, PJA library available under GNU General Public License is supplied with its Java source files, and is a good exemple for studying : How pixels are drawn by graphics functions on a computer (com.eteks.awt.PJAGraphics uses Bresenham algorithms to draw lines and circles). How to use the Java paradigm for managing images specified by the ImageConsumer/ImageProducer/ImageObserver interfaces. How Java Toolkit works and what it needs to work (which abstract classes and interfaces to implement). Regards, Chris. -Original Message- From: p niemandt [mailto:[EMAIL PROTECTED] Sent: Friday, 21 March 2003 7:18 a.m. To: Tomcat Users List Subject: Re: Can't connect to X11 window server using '0:0' as the value ofthe display and now java.awt.HeadlessException 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 ;-) ]. On Thu, 2003-03-20 at 18:34, Micael wrote: 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.init(Window.java:226) at java.awt.Frame.init(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
Re: Can't connect to X11 window server using '0:0' as the value ofthe display and now java.awt.HeadlessException
Yep: Done correctly, this is probably the more 'correct' solution, but,
and I'm probably opening myself to a lot of flamebait, but I do suspect
that using something like Xvfb might give some advantages that using
headless won't. For example, and I'm just guessing, but I think that
'headless' is purely a software solution, while Xvfb might be connected
to your display adaptor, and therefor might be faster or less of a drain
on your system resources.
{
But, like I said, I have no documentation to back up this statement,
this is purely a guess and based on my personal findings: If anybody
else knows differently, I would be very interested to know more, as I'm
doing a lot more graphics orientated servlets, that usually run on
headless boxes }
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.
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
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RE: Can't connect to X11 window server using '0:0' as the value ofthe display and now java.awt.HeadlessException
Hi,
I would say that Xvfb does _not_ connect to your display adapter - the v
stands for virtual, ie it's not a real frame buffer as in a video card -
it's a virtual one in your systems normal memory.
It's specifically for taking the place of a display adapter when your server
doesn't have one.
We always used to use this on sun E250s without a display adapter, but now
we use headless as it's more reliable.
Andy
-Original Message-
From: p niemandt [mailto:[EMAIL PROTECTED]
Sent: 20 March 2003 21:47
To: Tomcat Users List
Subject: Re: Can't connect to X11 window server using '0:0' as the value
ofthe display and now java.awt.HeadlessException
Yep: Done correctly, this is probably the more 'correct' solution, but,
and I'm probably opening myself to a lot of flamebait, but I do suspect
that using something like Xvfb might give some advantages that using
headless won't. For example, and I'm just guessing, but I think that
'headless' is purely a software solution, while Xvfb might be connected
to your display adaptor, and therefor might be faster or less of a drain
on your system resources.
{
But, like I said, I have no documentation to back up this statement,
this is purely a guess and based on my personal findings: If anybody
else knows differently, I would be very interested to know more, as I'm
doing a lot more graphics orientated servlets, that usually run on
headless boxes }
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.
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
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Re: Can't connect to X11 window server using '0:0' as the value ofthedisplay and now java.awt.HeadlessException
Sorry but with headless I can't create a Frame, with Xvfb I can.
Georges
Andy Eastham wrote:
Hi,
I would say that Xvfb does _not_ connect to your display adapter - the v
stands for virtual, ie it's not a real frame buffer as in a video card -
it's a virtual one in your systems normal memory.
It's specifically for taking the place of a display adapter when your server
doesn't have one.
We always used to use this on sun E250s without a display adapter, but now
we use headless as it's more reliable.
Andy
-Original Message-
From: p niemandt [mailto:[EMAIL PROTECTED]
Sent: 20 March 2003 21:47
To: Tomcat Users List
Subject: Re: Can't connect to X11 window server using '0:0' as the value
ofthe display and now java.awt.HeadlessException
Yep: Done correctly, this is probably the more 'correct' solution, but,
and I'm probably opening myself to a lot of flamebait, but I do suspect
that using something like Xvfb might give some advantages that using
headless won't. For example, and I'm just guessing, but I think that
'headless' is purely a software solution, while Xvfb might be connected
to your display adaptor, and therefor might be faster or less of a drain
on your system resources.
{
But, like I said, I have no documentation to back up this statement,
this is purely a guess and based on my personal findings: If anybody
else knows differently, I would be very interested to know more, as I'm
doing a lot more graphics orientated servlets, that usually run on
headless boxes }
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.
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
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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
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have received this transmission in error, please delete the
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you
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Re: Can't connect to X11 window server using '0:0' as the value ofthe display
Zsolt Koppany [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Hi, does it need modifications in the application or it will work with every AWT dependent application? Depends what you want to do basically. Running headless causes the JVM to replace most of the basic functions that you previously needed to be provided by the standard Linux utility Xvfb (e.g. fonts, color-mappings). I can think of cases where headless isn't enough, but if you are that creative, it deserves another topic ;-) Zsolt -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Theodore Chen Sent: Mittwoch, 19. März 2003 00:37 To: Tomcat Users List Subject: Re: Can't connect to X11 window server using '0:0' as the value ofthe display Try running the Tomcat VM with the -Djava.awt.headless=true system property (set it in an environment variable named CATALINA_OPTS). On Tue, 2003-03-18 at 16:31, Georges Roux wrote: 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] - 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 ofthedisplay
Thanks, I put System.setProperty(java.awt.headless, true); in my servlet init method and it's ok now. Georges Bill Barker wrote: Zsolt Koppany [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Hi, does it need modifications in the application or it will work with every AWT dependent application? Depends what you want to do basically. Running headless causes the JVM to replace most of the basic functions that you previously needed to be provided by the standard Linux utility Xvfb (e.g. fonts, color-mappings). I can think of cases where headless isn't enough, but if you are that creative, it deserves another topic ;-) Zsolt -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Theodore Chen Sent: Mittwoch, 19. März 2003 00:37 To: Tomcat Users List Subject: Re: Can't connect to X11 window server using '0:0' as the value ofthe display Try running the Tomcat VM with the -Djava.awt.headless=true system property (set it in an environment variable named CATALINA_OPTS). On Tue, 2003-03-18 at 16:31, Georges Roux wrote: 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] - 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]
Re: Can't connect to X11 window server using '0:0' as the value ofthe display
Georges Roux wrote: 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] Try 'xhost +' as root. per erik - 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
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]
Can't connect to X11 window server using '0:0' as the value of thedisplay
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]
RE: Can't connect to X11 window server using '0:0' as the value of the display
can you try to set the DISPLAY env variable to localhost:0.0 export DISPLAY=localhost:0.0 Filip -Original Message- From: Georges Roux [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 18, 2003 3:32 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]
Re: Can't connect to X11 window server using '0:0' as the value ofthe display
Try running the Tomcat VM with the -Djava.awt.headless=true system property (set it in an environment variable named CATALINA_OPTS). On Tue, 2003-03-18 at 16:31, Georges Roux wrote: 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]
RE: Can't connect to X11 window server using '0:0' as the value ofthe display
Hi, does it need modifications in the application or it will work with every AWT dependent application? Zsolt -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Theodore Chen Sent: Mittwoch, 19. März 2003 00:37 To: Tomcat Users List Subject: Re: Can't connect to X11 window server using '0:0' as the value ofthe display Try running the Tomcat VM with the -Djava.awt.headless=true system property (set it in an environment variable named CATALINA_OPTS). On Tue, 2003-03-18 at 16:31, Georges Roux wrote: 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] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
