Bug#582246: sun-java6-plugin: java somtimes crashes when opening java window

[Bernhard Kuemel]

Package: sun-java6-plugin
Version: 6.20-dlj-3
Severity: normal


Sometimes java crashes when I open a window with www2.superchat.at. I 
have to 'killall -9 java'.

To reproduce log in at www2.superchat.at:

Use the 'Chat Login' for 'Neue und unregistrierte Benutzer' (new
and unregistered users'.
Enter your 'Wunsch-Nickname' (desired nickname),
'Geschlecht' (sex).
Check 'Ich habe die Hinweise zum Thema Jugendschutz und Privatsphäre
gelesen.' (I have read the hints regarding protection of minors and privacy)
and click 'Login*' (*By clicking you agree to the terms of use.) You 
will get to the "session page".
Click 'Chat' in the menu bar of the top frame.
Scroll down and click on 'VIP-Lounge'. A chat window will open and tell 
you: '[Dieser Raum ist nur VIPs zugänglich.]' ('This room is only 
available to VIPs.')
Move you iceweasel window so that the link 'VIP-Lounge' is above the 
close button of the VIP-Lounge chat window. Switch to the VIP-Lounge 
chat window.

Now you can quickly and repeatedly close the VIP-Lounge chat window and
without moving the mouse reopen it with a second click. This is a good
strategy to enter full chat rooms, which you can only enter, when 
someone leaves the room and before someone else fills it up again.
However, this also greatly increases the chance of triggering the bug:

All chat windows will be unresponsive. They will not restore their 
content when other windows have temporarily covered it. They can no
longer be closed. Iceweasel continues to work. When I 'killall -9 java' 
(or 'killall -9 java_vm' in older versions) all chat windows disappear. 
When I reload session page I can reopen the windows that I lost, but 
their contents will remain lost.

There's a good chance to trigger the bug with 100 or 200 attempts. Keep 
trying for 2 minutes or so.

With older versions of java or iceweasel (or both, I don't remember) 
iceweasel would also crash and use full CPU so I had to kill and 
restart it.

The bug may also happen when opening other windows, such as when you go 
to the 'Leute' page, click on anyones nick and then on 'Privaten Dialog 
öffnen'. The same close button over window open link/button strategy 
works here. It also happened once when in a chat window in the chat 
menu I opened the 'Liste der ignorierten Benutzer ...'.

Thanks for investigating this bug.

Bernhard

-- System Information:
Debian Release: squeeze/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable')
Architecture: i386 (i686)

Kernel: Linux 2.6.32-4-686 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages sun-java6-plugin depends on:
ii  epiphany-browser              2.29.3-1   Intuitive GNOME web browser
ii  iceweasel                     3.5.9-3    Web browser based on Firefox
ii  libasound2                    1.0.22-2   shared library for ALSA applicatio
ii  libx11-6                      2:1.3.3-2  X11 client-side library
ii  libxext6                      2:1.1.1-3  X11 miscellaneous extension librar
ii  libxi6                        2:1.3-4    X11 Input extension library
ii  libxtst6                      2:1.1.0-2  X11 Testing -- Resource extension 
ii  sun-java6-bin                 6.20-dlj-3 Sun Java(TM) Runtime Environment (

sun-java6-plugin recommends no packages.

sun-java6-plugin suggests no packages.

-- no debconf information