IcedTea6 1.12.6 browser plugin crashes when loading pages with Java applets

Bug #1215487 reported by DurvalMenezes on 2013-08-22
This bug affects 3 people
Affects Status Importance Assigned to Milestone
openjdk-6 (Ubuntu)

Bug Description

Here's what's shown when calling the browser from a shell:

  java version "1.6.0_27"
  OpenJDK Runtime Environment (IcedTea6 1.12.6) (6b27-1.12.6-1ubuntu0.10.04.2)
  OpenJDK Server VM (build 20.0-b12, mixed mode)
   at javax.swing.SwingUtilities.appContextGet(
   at javax.swing.SwingUtilities.getSharedOwnerFrame(
   at javax.swing.JWindow.<init>(
   at javax.swing.JWindow.<init>(
   at net.sourceforge.jnlp.runtime.JNLPSecurityManager.<init>(
   at net.sourceforge.jnlp.runtime.JNLPRuntime.initialize(
   at sun.applet.PluginAppletSecurityContext.<init>(
   at sun.applet.PluginMain.main(
  Something very bad happened. I don't know what to do, so I am going to exit :(

I detected the issue while running Seamonkey 2.20 on web pages containing embedded Java applets (here's a handy one to test:, but I know it also happens with previous versions of Seamonkey, and I suspect it also happens with other browsers.

The workaround is to downgrade the IcedTea6 packages to the immediately preceding version:

  cd /tmp
  wget \ \
  sudo dpkg -i openjdk-6-jre-headless_6b27-1.12.5-0ubuntu0.10.04.1_i386.deb \
   icedtea-6-jre-cacao_6b27-1.12.5-0ubuntu0.10.04.1_i386.deb \

Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in openjdk-6 (Ubuntu):
status: New → Confirmed
Fr3ddie (fr3ddie) wrote :

I guess this bug should not have an importance rated "undecided" because, in this moment, as we have no Java from Sun/Oracle anymore in the repositories, we haven't ANY working Java plugin for browsers in LTS repositories....
I think this is very problematic.

I can reproduce this in openjdk-7, built from latest icedtea (2.4.4) and latest icedtea web plugin. It looks like a JDK bug.

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