PM73622: Debugging a Jython script results in no variables being shown

Rational Application Developer for WebSphere Software 8.5.1
Rational Application Developer Standard Edition, Version 8.0.4.2

APAR status

• Closed as program error.

Error description

• Abstract:
  
  Attempts to debug a Jython script result in no variables
  appearing in the Variables view.
  
  Problem:
  
  Environment: Windows 7 64 bits or Windows 2008 R2 64bits
  
  Steps to reproduce:
  
  1. Start WebSphere Application Server
  2. Start the product
  3. Create a new Jython Project
  4. Create a new new Jython script inside the project, with this
  code:
  
  ----------------------------------------------------------------
  -----
  
  #
  # TODO: enter JYTHON code and save
  #
  
  GLOBALVAR = 1
  
  def _getOsType( os=None ):
      '''Select the OS behavior based on os argument, 'python.os'
  registry
      setting and 'os.name' Java property.
      os: explicitly select desired OS. os=None to autodetect,
  os='None'
  to
      disable
      '''
      print 'In method'
      os = os or sys.registry.getProperty( 'python.os' ) or
                 java.lang.System.getProperty( 'os.name' )
      print os
      print GLOBALVAR
      _osTypeMap = (
          ( 'nt', r'(nt)|(Windows NT)|(Windows NT
  4.0)|(WindowsNT)|'
                  r'(Windows 2000)|(Windows XP)|(Windows Server
  2008 R2)|(Windows 7)'),
          ( 'dos', r'(dos)|(Windows 95)|(Windows 98)|(Windows ME)'
  ),
          ( 'mac', r'(mac)|(MacOS.*)|(Darwin)' ),
          ( 'None', r'(None)' ),
          ( 'posix', r'(.*)' ), # default - posix seems to vary
  mast widely
          )
      for osType, pattern in _osTypeMap:
          if re.match( pattern, os ):
              break
      return osType
  
  if __name__ == '__main__':
     print 'In Main'
     _getOsType()
  ----------------------------------------------------------------
  -----
  
  5. Put a breakpoint on the line: 'print os'
  6. Right click on the script
  7. Select: Debug As ? Administrative script
  8. Select as run-time WebSphere Application Server 8 and the
  profile that was started in point 1.
  9. Click on Debug
  
  10. You will see this output:
  
  ----------------------------------------------------------------
  -----
  
   WASX7209I: Connected to process 'server1' on node
  IBM-OPRSURVFAT7Node01 using SOAP connector;  The type of process
  is: UnManagedProcess
  WASX7303I: The following options are passed to the scripting
  environment and are available as arguments that are stored in
  the argv variable: '[ARG0, C:/TestJython/NewScript.jy]'
  In Main
  In method
  
  The debugger will stop at the breakpoint.
  
  After you press 'Step Over' you will see:
  
  Windows 7
  1
  ----------------------------------------------------------------
  -----
  
  11. Select 'Step Over'
  12. The ?workspace?\.metadata\.log view will show these
  exceptions:
  ----------------------------------------------------------------
  -----
  
  java.lang.NullPointerException
     at
  com.ibm.debug.jython.internal.model.JythonThread.navigateToTopSt
  ackFrameIfNecessary(Unknown
  Source)
     at
  com.ibm.debug.jython.internal.model.JythonThread.updateStackFram
  es(Unknown
  Source)
     at
  com.ibm.debug.jython.internal.model.JythonThread.handleJythonDeb
  ugEvent(Unknown
  Source)
     at
  com.ibm.debug.jython.internal.model.JythonConnectionClient.fireC
  ommandStopEvent(Unknown
  Source)
     at
  com.ibm.debug.jython.internal.model.JythonConnectionClient.fireE
  vent(Unknown
  Source)
     at
  com.ibm.debug.jython.internal.model.JythonOutputStreamMonitor.fi
  reEvent(Unknown
  Source)
     at
  com.ibm.debug.jython.internal.engine.PdbStreamMonitor$2.run(Unkn
  own
  Source)
     at
  com.ibm.debug.jython.internal.engine.JTThreadJob.run(Unknown
  Source)
     at org.eclipse.core.internal.jobs.Worker.run(Unknown Source)
  ----------------------------------------------------------------
  -----
  
  13. At no time are the variables visible in the Variables View.
  
  14. Additionally, the menu: 'Show all Jython Variables' appears
  dimmed.
  
  Note:
  
  On these operating systems, the following file:
  
  
  
  ?WAS_HOME?\optionalLibraries\jython\Lib\javaos.py
  
  needs to be changed to include the operating system names in the
   _osTypeMap and to avoid errors like the following:
  ----------------------------------------------------------------
  -----
                                Failed to get environment, environ
  will be empty: (0, 'Failed to
  execute command ([\'sh\', \'-c\', \'env\']):
  java.io.IOException:
  Cannot run program 'sh': CreateProcess error=2, The system
  cannot find
  the file specified.')
  workaround:
   Not available
  ----------------------------------------------------------------
  -----
  
  
  Local fix:
  
  There is no known workaround at this time.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  There is an error in the function to parse the source
  locations of a stack frame. It is unable to handle
  parentheses in the path name.
  

Problem conclusion

• Fixed the problem in the parsing algorithm.
  
  The fix for this APAR is included in Rational Application
  Developer v8.0.4.2.
  

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

  RAD-AD

• Fixed component ID

  5724J1903

Applicable component levels

• R803 PSN

     UP