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[Alexei <1204906@xxxxxxxxxxxxxxxxxx>]

Netbeans on Ubuntu 12.04 is almost unusable.

Now JVM starts creating EventQueue thread for each dialog! (like that was 10 years ago?)
It cause multiple access from non-event-dispatcher threads that cause random hanging and bugs.
We have such problems with  OpenStreetMap editing application JOSM, here is the description:
http://josm.openstreetmap.de/ticket/8921#comment:22

** Bug watch added: JOSM bug tracker #8921
   http://josm.openstreetmap.de/ticket/8921

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which is subscribed to openjdk-6 in Ubuntu.
https://bugs.launchpad.net/bugs/1204906

Title:
  NetBeans, VisualVM, etc. broken with latest security release for 12.04

Status in “openjdk-6” package in Ubuntu:
  Confirmed

Bug description:
  The latest security update of OpenJDK 6 appears to have broken
  NetBeans and other NetBeans platform based applications such as
  VisualVM. It may break many other Swing applications - not tested.
  Manifests as UI issues, NPE's and lockups (eg. find usages dialog
  hangs NetBeans).  One stack trace shows EventQueue.isDispatchThread()
  returning false from within the dispatch thread.

  All is fine in current OpenJDK 7.  Looking at NetBeans on OpenJDK 6
  from VisualVM (running on 7!) shows multiple AWT event queues and
  sometimes deadlock between them. Same result is not seen when running
  NetBeans with OpenJDK 7.

  Running on 12.04 with OpenJDK-6-JRE 6b27-1.12.6-1ubuntu0.12.04.2

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