[Bug 969520] Re: IcedTea Java Web Start fails to open .jnlp file

[KennoVO]

The above workaround will break every time the package is updated. The correct workaround (in line with what Sam_ posted) is:
sudo update-alternatives --config javaws
and then choose the number in front of /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/javaws

Of course, this doesn't change the fact that this is a bug that needs to
be fixed. Specifically, the packages should provide the package manager
with the necessary hints so that the alternatives are always set right
(if I understand the software stack correctly).

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https://bugs.launchpad.net/bugs/969520

Title:
  IcedTea Java Web Start fails to open .jnlp file

Status in “icedtea-web” package in Ubuntu:
  Confirmed

Bug description:
  Attempt to open a downloaded .jnlp file by right click and selecting 'IcedTea Java Web Start' fails.
  There is no result or feedback what's wrong.
  .xsession-errors reveals that /usr/bin/javaws wrongly points to java-6-openjdk although it isn't installed and hence no alternative.
  Workaround: adjust lines 3 and 9 to java-7*.

  Example files.
  http://volumeviewer.kenai.com/index.html
  ## another example would be 'sweethome3d' in bug 224800

  ## On attempt to run the .jnlp file firefox is preselected, downloads the file and opens an empty tab.
  Edit: Failed mimetype was addressed and fixed in bug 949823.

  Related packages installed.
  ii  icedtea-7-jre-cacao                    7~u3-2.1-1ubuntu3
  ii  icedtea-7-jre-jamvm                    7~u3-2.1-1ubuntu3
  ii  icedtea-7-plugin                       1.2-1ubuntu1
  ii  icedtea-netx                           1.2-1ubuntu1
  ii  icedtea-netx-common                    1.2-1ubuntu1
  ii  openjdk-7-jre                          7~u3-2.1-1ubuntu3
  ii  openjdk-7-jre-headless                 7~u3-2.1-1ubuntu3
  ii  openjdk-7-jre-lib                      7~u3-2.1-1ubuntu3

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: icedtea-netx 1.2-1ubuntu1
  ProcVersionSignature: Ubuntu 3.2.0-20.33-generic 3.2.12
  Uname: Linux 3.2.0-20-generic x86_64
  ApportVersion: 1.95-0ubuntu1
  Architecture: amd64
  Date: Fri Mar 30 20:25:21 2012
  Dependencies: icedtea-netx-common 1.2-1ubuntu1
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120204)
  ProcEnviron:
   TERM=xterm
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  SourcePackage: icedtea-web
  UpgradeStatus: No upgrade log present (probably fresh install)

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