Re: Java Error was Tomcat java properties question

[Pete Helgren <Pete@xxxxxxxxxx>]

Let me scroll back a bit.

There are some Java programs that require the use of a graphics engine 
in order to render the graphic components.  For example, we use Jasper 
Reports to generate PDF reports and iChart to generate charts on the 
iSeries using Java (mostly java servlets).

The first time we used Jasper, we got the error message about the need 
to have java.awt.headless=true in the properties file.  Installing PASE 
and then setting these values in the 
'/QIBM/UserData/Java400/SystemDefault.properties' file is what took care 
of the error for us.  As I mentioned both in the post from last year and 
the latest post, I am not sure what it took to make the system finally 
read the file.  I suspect that it was because we had an instance of Java 
running somewhere (either a Tomcat app or some other Java app). Once we 
ended the java app the next instantiation must have used the new 
settings because the error went away.

When we install the applications at our customers site, we make sure 
that PASE is installed and the properties file configured before we fire 
up a Java app and I haven't had the experience of it NOT working since 
our own first experience.

We start nothing in PASE.  We submit no jobs or use any shell.  The ONLY 
shell command we use is to start Tomcat.  So, no, I don't think it is 
necessary to call any programs or run any shell commands in order for 
your java program to render graphics using AWT "headless".  Again, we 
make sure PASE is installed and we make sure the 
SystemDefault.properties file is set, and it has worked for us.
The entire file contents are as follows:

java.home=/QIBM/ProdData/Java400/jdk14/ 
java.version=1.4                        
os400.awt.native=true                   
java.awt.headless=true                  
user.timezone=America/Denver            

Of course this would mean that you have the jdk 1.4 version installed on 
your iSEries (licensed program 5722JV1 6  Java Developer Kit 1.4).

If all of that is true for you, then I am as stumped as you.  You could 
check it after your next IPL or you could try calling IBM and see if 
they have suggestions.

Pete

P.S.  If you actually *wanted* VNC running, you'd need to have 5722PTL 
installed and use the directions found at this link:

http://www-03.ibm.com/servers/enable/site/porting/tools/vnc.html but 
again, there is no need to have it running in order to run Java programs 
using AWT in headless mode.




Hatzenbeler, Tim wrote:

> To make this work do I need to run this first?
>
> CALL PGM(QSYS/QP2SHELL)
> PARM('/QOpenSys/QIBM/ProdData/DeveloperTools/vnc/vncserver_java' ':1') 
>
>
> I'm not running NAWT...  Should this be running when I set the headless
> value to true?
>
> Thanks, Tim
>
>
> -----Original Message-----
> From: web400-bounces@xxxxxxxxxxxx [mailto:web400-bounces@xxxxxxxxxxxx] On
> Behalf Of Pete Helgren
> Sent: Monday, February 06, 2006 1:16 PM
> To: Web Enabling the AS400 / iSeries
> Subject: Re: [WEB400] Java Error was Tomcat java properties question
>
> We start Tomcat from a CL that calls the Qshell commands so, no, it isn't
> necessary to be running it interactively from the shell in order for this to
> work.
>
> This is ringing a bell in my head because I *know* we had this problem
> before and resolved it.  This entry is in the archives:
>
> http://archive.midrange.com/java400-l/200501/msg00051.html
>
> The only other thing I saw in the thread was that the
>
> java.home=/QIBM/ProdData/Java400/jdk14/
> java.version=1.4
>
> was needed.  What version of the JVM are you running?
>
> Pete
>
>
> Hatzenbeler, Tim wrote:
>
>  
>
> > I do have that installed...  Do I have to be in a qp2term session when 
> > I start tomcat?  Or will the jvm automagically tap in to pase?
> >
> > Thanks, Tim
> >
> > -----Original Message-----
> > From: web400-bounces@xxxxxxxxxxxx [mailto:web400-bounces@xxxxxxxxxxxx] 
> > On Behalf Of Pete Helgren
> > Sent: Monday, February 06, 2006 12:36 PM
> > To: Web Enabling the AS400 / iSeries
> > Subject: Re: [WEB400] Java Error was Tomcat java properties question
> >
> > Tim,
> >
> > Sorry if I asked this or you mentioned this before:
> >
> > Do you have PASE installed? ("OS/400 - Portable App Solutions 
> > Environment" licensed program 5722SS1    Option 33)
> >
> > You will need to have it installed for the graphics engine referred to 
> > by AWT.
> >
> > Make sure that all JVM instances aren't running.  I remember that at 
> > first I couldn't get it to work.  Can't remember what, exactly, it took 
> > after PASE was installed but I think Tomcat had to be restarted and any 
> > JVM instances ended before it started to work.
> >
> > Pete
> >
> >
> > Hatzenbeler, Tim wrote:
> >
> >
> >
> >    
> >
> > > I changed my config, to only have those 2 lines...
> > >
> > > And I'm still getting this error...
> > >
> > > AWT class or API used without specifying property 
> > > os400.awt.native=true or java.awt.headless=true
> > >
> > > Is there a quick way, in a jsp, to pull these properties values, and 
> > > show them on the screen,to see what there set to?  Mayby tomcat, is 
> > > overriding the values..
> > >
> > > Thanks, Tim
> > >
> > >
> > > -----Original Message-----
> > > From: web400-bounces@xxxxxxxxxxxx [mailto:web400-bounces@xxxxxxxxxxxx]
> > > On Behalf Of Pete Helgren
> > > Sent: Friday, February 03, 2006 8:48 PM
> > > To: Web Enabling the AS400 / iSeries
> > > Subject: Re: [WEB400] Java Error was Tomcat java properties question
> > >
> > > Skip the java.home and java.version stuff, we use that to point to a 
> > > specific JVM
> > >
> > > Use only :
> > >
> > > os400.awt.native=true                 
> > > java.awt.headless=true
> > >
> > >
> > > and see what happens.
> > >
> > > Pete
> > >
> > > Hatzenbeler, Tim wrote:
> > >
> > >
> > >
> > >   
> > >
> > >      
> > >
> > > > This is in our file:
> > > >
> > > > java.home=/QIBM/ProdData/Java400/jdk14/
> > > > java.version=1.4                      
> > > > os400.awt.native=true                 
> > > > java.awt.headless=true                
> > > > ------------------------------------
> > > >
> > > > I'm running 5.2
> > > >
> > > >
> > > > If I use those settings, tomcat doesn't want to work...
> > > >
> > > > I removed them, and placed them in the catalina.sh, and I got the 
> > > > same error...
> > > >
> > > > "$_RUNJAVA" $JAVA_OPTS $CATALINA_OPTS \
> > > >   -Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" \
> > > >   -Dcatalina.base="$CATALINA_BASE" \
> > > >   -Dcatalina.home="$CATALINA_HOME" \
> > > > --->  -Djava.awt.headless=true \
> > > >   -Djava.io.tmpdir="$CATALINA_TMPDIR" \
> > > >   org.apache.catalina.startup.Bootstrap "$@" start \
> > > >   >> "$CATALINA_BASE"/logs/catalina.out 2>&1 &
> > > >
> > > >   if [ ! -z "$CATALINA_PID" ]; then
> > > >     echo $! > $CATALINA_PID
> > > >   fi      
> > > >
> > > >
> > > > 40   02/03/06  15:34:59.128760  realcftrap2              0018F8   QJVAJNI
> > > > QSYS        *STMT
> > > > To module . . . . . . . . . :   QJVAJNI
> > > >
> > > > To procedure  . . . . . . . :   JNI_CreateJavaVM
> > > >
> > > > Statement . . . . . . . . . :   5529
> > > >
> > > > Message . . . . :   The Java Virtual Machine has ended.
> > > >
> > > > Cause . . . . . :   Java Virtual Machine 1 has ended because of reason
> > > > 4.  The               
> > > >   reason codes are defined as follows: 01- A Java program called 
> > > > the
> > > >
> > > >   java.lang.System.exit method with a zero status code. 02- A Java
> > > > program                   
> > > >   called the java.lang.System.exit method with a non zero status 
> > > > code
> > > >  
> > > >
> > > >     
> > > >
> > > >        
> > > of
> > >
> > >
> > >   
> > >
> > >      
> > >
> > > > 0.                  
> > > >   03- An unexpected system error was detected. 04- A critical Java
> > > > Virtual                   
> > > >   Machine thread has ended and processing cannot continue. Recovery  .
> > > >  
> > > >
> > > >     
> > > >
> > > >        
> > > .
> > >
> > >
> > >   
> > >
> > >      
> > >
> > > > . :                 
> > > >   If the Java Virtual Machine ended because of reason code 03, an
> > > > internal                   
> > > >   error has occurred.  Contact you service representative.  Information
> > > > about                
> > > >   the error was saved in the Licensed Internal Code log.
> > > >
> > > > 40   02/03/06  15:34:59.254304  QJVAUTLJVM   QSYS        *STMT    QJVAJVM
> > > > QSYS        *STMT
> > > > From module . . . . . . . . :   QJVAUTLJVM
> > > >
> > > > From procedure  . . . . . . :   JvaSendMsg
> > > >
> > > >
> > > > Do I need to launch tomcat through the pase enviornment?  Or just the 
> > > > standard strqsh?
> > > >
> > > > I'm struggling here...
> > > >
> > > > Thanks, Tim
> > > >
> > > > -----Original Message-----
> > > > From: web400-bounces@xxxxxxxxxxxx 
> > > > [mailto:web400-bounces@xxxxxxxxxxxx]
> > > > On Behalf Of Pete Helgren
> > > > Sent: Friday, February 03, 2006 1:41 PM
> > > > To: Web Enabling the AS400 / iSeries
> > > > Subject: Re: [WEB400] Tomcat java properties question
> > > >
> > > > You don't set it for an app, you just set the general property in the 
> > > > /QIBM/UserData/Java400/SystemDefault.properties file
> > > >
> > > > This is in our file:
> > > >
> > > > java.home=/QIBM/ProdData/Java400/jdk14/
> > > > java.version=1.4                      
> > > > os400.awt.native=true                 
> > > > java.awt.headless=true                
> > > >
> > > > HTH
> > > >
> > > > Pete Helgren
> > > >
> > > >
> > > > Hatzenbeler, Tim wrote:
> > > >
> > > >
> > > >
> > > >  
> > > >
> > > >     
> > > >
> > > >        
> > > >
> > > > > I have a webapp, that is giving me this error message...
> > > > >
> > > > > AWT class or API used without specifying property 
> > > > > os400.awt.native=true or java.awt.headless=true
> > > > >
> > > > > How would I set the headless = true, for an app in tomcat? 
> > > > >
> > > > > Thanks, Tim
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >    
> > > > >
> > > > >       
> > > > >
> > > > >          
> > > > --
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> > > >
> > > >
> > > >
> > > >  
> > > >
> > > >     
> > > >
> > > >        
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