FULL PRODUCT VERSION :
java version "1.6.0_04"
Java(TM) SE Runtime Environment (build 1.6.0_04-b12)
Java HotSpot(TM) Server VM (build 10.0-b19, mixed mode)
java version "1.5.0_14"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_14-b03)
Java HotSpot(TM) Server VM (build 1.5.0_14-b03, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Suse Linus Enterprice Server 10

output of uname -a:
Linux <hostname> 2.6.16.21-0.8-bigsmp #1 SMP Mon Jul 3 18:25:39 UTC 2006 i686 i686 i386 GNU/Linux


EXTRA RELEVANT SYSTEM CONFIGURATION :
CUPS version 1.1.23

A DESCRIPTION OF THE PROBLEM :
Today I found yet another bug in the sun.print.CUPSPrinter class, which as well is responsible for the following NullPointerException (especially in a multi threaded application, see as well Bug ID 6390756):

    java.lang.NullPointerException
            at sun.print.IPPPrintService.findCustomMedia(IPPPrintService.java:845)
            at sun.print.UnixPrintJob.print(UnixPrintJob.java:328)
            ...

In the source of class sun.print.CUPSPrinter, I saw that the variable "initialized" was on the one hand a static variable and on the other hand used to control the initialization of instance variables ( customer  particular the array cupsCustomMediaSNames) in method initMedia(). This of cource causes trouble when more than one CUPSPrinter instances are created, without calling initMedia() immediately after instantiation (to be precise: before the next CUPSPrinter instance is created).



REPRODUCIBILITY :
This bug can be reproduced often.
Posted Date : 2008-02-04 13:31:59.0

N/A

As described, need to remove static and synchronize initMedia.
Posted Date : 2008-11-11 23:28:57.0