JR48610: INVOKER.JSP WITH BUSEROUTPUT=FALSE CAUSES CLASSCASTEXCEPTION WHEN INVOKING JAVA API EXTENTION POINT TRIGGER SCRIPT

APAR status

• Closed as program error.

Error description

• Preface:
  
  1. You have a custom tool (ASP/JSP script). This custom tool
     makes use of a html <form>.
  
  2. The <form> makes use of the hidden input parameter
     "bUserOutput" which is set to "false".
     With this setting you want to show the user output only.
     You do not want to show the request protocols or script
     context.
        <input type="hidden" name="bUserOutput" value="false">
  
  3. When submitting the <form>, you invoke the invoker.jsp,
     launching a trigger script.
  
  4. This trigger script is a Java API extension point.
  
  5. Within the JavaAPI extention point class, you try to get
     the PrintWriter from the TriggerFunctionArguments.
     Here the relevant excerpt of your Java source code:
        protected static final Context ctx =
        PIMContextFactory.getCurrentContext();
        public void trigger(TriggerFunctionArguments inArgs) {
        PrintWriter cpOut = inArgs.getOutput();
  
  
  Current situation:
  
  1. When clicking submitting your <form>, you will run into
     this error "Exception: Generic Error"
  
  2. At the same time the subsequent exception is being thrown
     in the 'exception.log' of the application server:
     <time stamp> [jsp_110: invoker.jsp] ERROR
     com.ibm.ccd.common.error.AustinException -
     CWPCM0002E:Generic error / Exception: Generic Error,
     Exception:org.apache.jasper.runtime.JspWriterImpl
     incompatible with java.io.PrintWriter
        java.lang.ClassCastException:
        org.apache.jasper.runtime.JspWriterImpl incompatible
        with java.io.PrintWriter
        at
        com.ibm.ccd.api.extensionpoints.DefaultArgumentMappings.
        getOutput(DefaultArgumentMappings.java:1248)
        at
        com.ibm.ccd.api.extensionpoints.TriggerFunctionArguments
        Impl.getOutput(TriggerFunctionArgumentsImpl.java:56)
        ...
  
  3. When using 'bUserOutput=true' (or by skipping this
     parameter), you will see your desired user output in
     addition to the session diagnostic information.
  
  
  Desired situation:
  
     When using 'bUserOutput=false', you should see your custom
     output from your Java API extension point trigger script.
  

Local fix

• 1. Use WPC script instead of Java API extension point.
  2. Use 'bUserOutput=true'.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All Master Data Management Collaboration Server              *
  * implementations are affected by this issue.                  *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * All Master Data Management Collaboration Server              *
  * implementations are affected by this issue.                  *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * IBM recommends that customers facing the issue reported by   *
  * this APAR apply  Master Data Management Collaboration Server *
  * version 11.0.0-FP004 to gain resolution to this problem.     *
  ****************************************************************
  

Problem conclusion

• A fix for this problem has been included in Master Data
  Management Collaboration Server version 11.0.0-FP004
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  MDM SERVER FOR

• Fixed component ID

  5724V5100

Applicable component levels

• RB00 PSY

     UP