Name: boT120536 Date: 03/22/2001


Java(TM) Plug-in: Version 1.3.1
Using JRE version 1.3.1-beta Java HotSpot(TM) Client VM
  User home directory = /home/cwturner
Proxy Configuration: no proxy

A signed applet can call java.lang.Runtime.exec() with no problems until following
an applet reload, when a call to exec() will hang. Thread traces show
the problem might be associated with interrupted forker and reaper threads.

A thread trace of the good working situation is:-
about to exec...
done
hello world
Dump thread list ...
Group main,ac=15,agc=1,pri=10
    main,5,alive
    AWT-EventQueue-0,6,alive
    SunToolkit.PostEventQueue-0,6,alive
    AWT-Motif,6,alive
    TimerQueue,5,alive,dameon
    Thread-0,5,alive
    Thread-1,5,alive
    Thread-2,5,alive
    Screen Updater,5,alive
Group http://java.cycom.co.uk/bugdemo/-threadGroup,ac=6,agc=0,pri=4
    AWT-EventQueue-1,4,alive
    SunToolkit.PostEventQueue-1,4,alive
    thread applet-BugDemo,4,alive
    TimerQueue,4,alive,dameon
    process reaper,4,alive,dameon
    process forker,4,alive,dameon
Done.

A thread trace following the applet reload and just prior to the hang is:-
Dump thread list ...
Group main,ac=15,agc=2,pri=10
    main,5,alive
    AWT-EventQueue-0,6,alive
    SunToolkit.PostEventQueue-0,6,alive
    AWT-Motif,6,alive
    TimerQueue,5,alive,dameon
    Thread-0,5,alive
    Thread-1,5,alive
    Thread-2,5,alive
    Screen Updater,5,alive
Group http://java.cycom.co.uk/bugdemo/-threadGroup,ac=2,agc=0,pri=4
    process reaper,4,alive,dameon,interrupted
    process forker,4,alive,dameon,interrupted
Group http://java.cycom.co.uk/bugdemo/-threadGroup,ac=4,agc=0,pri=4
    AWT-EventQueue-2,4,alive
    SunToolkit.PostEventQueue-2,4,alive
    thread applet-BugDemo,4,alive
    TimerQueue,4,alive,dameon
Done.
about to exec... (here it is hung)

It iseasy to set it up that way bu... jarred and signed applet are at
http://java.cycom.co.uk/bugdemo/
You can trust Cycom Limited.
(Review ID: 119068)
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