Packages dependent on sun-java6-jre that use the JVM in postinst fail

[Richard Wise]

Reproduced on Ubuntu 11.04 x64, with sun-java6-jre and sun-java6-bin package version 6.26-1natty1.

Expected: Installing a custom package with a dependency of sun-java6-jre and a postinst trigger that uses the JVM should work.

Actual: Failed postinst trigger due to "Error: could not open `/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/amd64/jvm.cfg'".

Cause: Because of the circular dependency between sun-java6-jre and sun-java6-bin, the JVM config files (in particular /etc/java-6-sun/jvm.cfg) are not renamed from *.dpkg-new before attempting to use Java in the postinst trigger of any packages that depend on sun-java6-jre (and implicitly java6-runtime or java6-runtime-headless). The temporary workaround is to alter the dependency for packages to explicitly rely on sun-java6-bin (to force package postinst to remove dpkg-new suffix), but this is not acceptable for official supplied packages (e.g. solr-common).