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  1.  Home
  2. JAVA400-L
  3. January 2004

RE: Error while calling java from RPG Java exception "java.lang.UnknownError:"

Hi
the problem is with activiation group some where in
process RCLRCS and RCLACTGRP is called and then i get
this problem
or else my programs work well

ashish
--- Bill Fly <billfly3@xxxxxxxxxxx> wrote:
> I have a working RPG program which calls a Java
> program. Here are some
> extractions from those programs:
> 
> Java program:
> public class SboXmlXlator { // <-- class header
> ...
>     public SboXmlXlator() { // constructor
> ...
>     public byte[] xml2Fixed(byte[] bobj,
>                             byte[] bact,
>                             byte[] breq) { // <--
> one of the called method
> signatures
> ...
> 
> RPG IV program:
>      d SboXmlXlator    c                  
> 'SboXmlXlator'
> 
>      d xml             s               o  
> class(*java : SboXmlXlator)
> <-- Java object instantiated by constructor
> 
>      d constructor     pr              o  
> extproc(*java : SboXmlXlator :
> <-- Java constructor
>      d                                            
> *constructor)
> 
>      d xml2Fixed       pr         32767a   varying
> <-- prototype for Java method xml2Fixed
>      d                                    
> extproc(*java : SboXmlXlator :
> <-- returns a byte array (highly recommended
>      d                                            
> 'xml2Fixed')
>      d                               14a   varying
> <-- passes byte arrays (highly recommended
>      d                               10a   varying
>      d                            32767a   varying
> ...
>            xml = constructor();
> <-- calls Java constructor, return instantiated
> ...
> Object of type SboXmlXlator
>            response = fixed2Xml(xml : object : tag :
> request);
> <-- calls Java method; notice first parameter
>  
> <-- is the object returned by the constructor
>  
> <-- and not defined in the method prototype.
> 
> Byte arrays are highly recommended as they are
> compatible with RPG IV
> varying length strings.  I started out calling the
> Java String constructor
> three times to create a Java String object for the
> three input parameters to
> the xml2Fixed method.
> Also, the xml2Fixed method returned a Java String
> object, which I then had
> to call the Static GetBytes method to create
> The RPG string variables.  By passing and returning
> the RPG strings as byte
> arrays, I saved four entries into Java.  Also, the
> four extra Java objects
> being created were not being garbage collected.  The
> byte arrays are not
> garbage collected just fine.  This works very well. 
> Also, notice the Java
> constructor method must be call first to
> instantiated the Java object of the
> type of the Java class.  That object then is passed
> as the initial parameter
> of each method call.  Remember in Java, you would
> reference the Java method
> as object.methodname.
> 
> These programs are run in batch and do not exit
> until the job is ended.  The
> first entry into Java loads the Java Virtual Machine
> which takes a little
> time.  As long as the RPG program does not exit
> (with LR on), the JVM should
> stay loaded, along with the called Java object.
> 
> Good luck,
> Bill
> -----Original Message-----
> From: Ashish Kulkarni
> [mailto:kulkarni_ash1312@xxxxxxxxx] 
> Sent: Monday, January 19, 2004 11:47 AM
> To: Java Programming on and around the iSeries /
> AS400
> Subject: RE: Error while calling java from RPG Java
> exception
> "java.lang.UnknownError:"
> 
> 
> Hi
> The problem is i cannot ask the end users to signoff
> and signon 
> here is my RPG code, what wrong may i be doing
> H thread(*serialize) 
> /define OS400_JVM_12   
> /Copy JNI              
> /Copy Prototype        
> d env             s               * 
> D crtPgm          pr              o   extproc(*java:
>  
>                   
> d                                    
> 'com.pfizer.maps.data.PORPGToJava' 
> d                                     :*Constructor
> ) 
>                   
> d dateFormat                      o  
>                                      
> class(*java:'java.lang.String')    
> d                                     const         
>  
>                   
> // i call a CL program to set env variable
>  c                   eval      env =
> getJniEnv('-Djava.version=1.4;')    
>  c                   callp    
> beginObjGroup(env:1000)
>                   
> C                   eval      
> dateFormat=crtString(Datfmt)
> //it fails on this line....
> C                   eval      
> popgm=crtPgm(@dateFormat)  
> // othe logic to call methods
> c                   callp      endObjGroup (env) 
> C                   EVAL       *INLR = *ON   
>                                             
> C                   RETURN  
> 
> Ashish
>  
> 
> --- "Bartell, Aaron L. (TC)"
> <ALBartell@xxxxxxxxxxxxxx> wrote:
> > Did you exit out of the program prematurely while
> in
> > debug or something of
> > that nature?  If so then a clearing of your
> > environment is a must to make
> > sure everything is in order, and the easiest and
> > safest way to do so is to
> > sign-off and back on again.  You could try and
> > reclaim the activation group,
> > but I don't know if that will take care of the
> Java
> > cleanup and references.
> > . .
> > 
> > HTH,
> > Aaron Bartell
> > 
> > -----Original Message-----
> > From: java400-l-bounces@xxxxxxxxxxxx
> > [mailto:java400-l-bounces@xxxxxxxxxxxx]On Behalf
> Of
> > Ashish Kulkarni
> > Sent: Monday, January 19, 2004 11:21 AM
> > To: Java Programming on and around the iSeries /
> > AS400
> > Subject: Re: Error while calling java from RPG
> Java
> > exception
> > "java.lang.UnknownError:"
> > 
> > 
> > Hi
> > Also in my job log i see error message
> > Tried to refer to all or part of an object that no
> > longer exists
> > 
> > What should i do
> > 
> > Ashish
> > --- Ashish Kulkarni <kulkarni_ash1312@xxxxxxxxx>
> > wrote:
> > > Hi
> > > I am using V5R2 and JDK1.4.1
> > > and calling Java from RPG, and having a weird
> > > problem
> > > Every thing works when i call this RPG program
> > first
> > > time, but when i call the RPG program second
> time
> > i
> > > get
> > > error saying
> > > 
> > > Message ID . . . . . . :   RNQ0301      
> Severity
> > .
> > > .
> > > . . . . . :   99         
> > >  Message type . . . . . :   Inquiry             
>  
> >  
> > >  
> > >                          
> > >  Date sent  . . . . . . :   01/19/04      Time
> > sent 
> > > .
> > > . . . . . :   10:54:23   
> > >                                                 
>  
> >  
> > >  
> > >                          
> > >  Message . . . . :   Java exception received
> when
> > > calling Java method (C G D    
> > >    F).                                          
>  
> >  
> > >  
> > >                          
> > >  Cause . . . . . :   RPG procedure PU610B01 in
> > > program
> > > CXSXA/PU610B received    
> > >    Java exception "java.lang.UnknownError:" when
> > > calling method "<init>" with   
> > >    signature "(Ljava.lang.String;)V" in class   
>  
> >  
> > >  
> > >                          
> > >    "com.pfizer.maps.data.PORPGToJava".          
>  
> >  
> > >  
> > >                          
> > >  Recovery  . . . :   Contact the person
> > responsible
> > > for program maintenance to  
> > >    determine the cause of the problem.          
>  
> >  
> > >  
> > >                          
> > >  Possible choices for replying to message . . .
> .
> > .
> > > .
> > > . . . . . . . . . :       
> > >    D -- Obtain RPG formatted dump.              
>  
> >  
> > >  
> > >                          
> > >    S -- Obtain system dump.                     
>  
> >  
> > >  
> > >                          
> > >    G -- Continue processing at *GETIN.          
>  
> >  
> > >  
> > >      
> > > 
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> iSeries / AS400 (JAVA400-L) mailing list
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