I am using Ubuntu Server.

When I do:

apt-get upgrade

it gets stuck on:

Setting up openjdk-6-jre-headless (6b20-1.9.7-0ubuntu1) ...

Why? And what can I do to stop it?

I tried removing it with apt-get... I get this error:

E: dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem.

So then I tried this:

dpkg --purge openjdk-6-jre-headless

I got this:

dpkg: dependency problems prevent removal of openjdk-6-jre-headless:
 openjdk-6-jre-lib depends on openjdk-6-jre-headless (>= 6b17).
 ca-certificates-java depends on openjdk-6-jre-headless (>= 6b16-1.6.1-2) | java6-runtime-headless; however:
  Package openjdk-6-jre-headless is to be removed.
  Package java6-runtime-headless is not installed.
  Package openjdk-6-jre-headless which provides java6-runtime-headless is to be removed.
 ca-certificates-java depends on openjdk-6-jre-headless (>= 6b16-1.6.1-2) | java6-runtime-headless; however:
  Package openjdk-6-jre-headless is to be removed.
  Package java6-runtime-headless is not installed.
  Package openjdk-6-jre-headless which provides java6-runtime-headless is to be removed.
dpkg: error processing openjdk-6-jre-headless (--purge):
 dependency problems - not removing
Errors were encountered while processing:
 openjdk-6-jre-headless

The thing is I think my DB is using it... Not sure... I am using Cassandra with Thrift...

Yes, it's getting a bit more complex...

# dpkg --configure -a

I get:

dpkg: dependency problems prevent configuration of openjdk-6-jre:
 openjdk-6-jre depends on openjdk-6-jre-headless (>= 6b20-1.9.7-0ubuntu1); however:
  Package openjdk-6-jre-headless is not configured yet.
dpkg: error processing openjdk-6-jre (--configure):
 dependency problems - leaving unconfigured
Processing triggers for libc-bin ...
ldconfig deferred processing now taking place
dpkg: dependency problems prevent configuration of libaccess-bridge-java:
 libaccess-bridge-java depends on default-jre | openjdk-6-jre | sun-java6-jre; however:
  Package default-jre is not installed.
  Package openjdk-6-jre is not configured yet.
  Package sun-java6-jre is not installed.
dpkg: error processing libaccess-bridge-java (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of icedtea-6-jre-cacao:
 icedtea-6-jre-cacao depends on openjdk-6-jre-headless (= 6b20-1.9.7-0ubuntu1); however:
  Package openjdk-6-jre-headless is not configured yet.
dpkg: error processing icedtea-6-jre-cacao (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libaccess-bridge-java-jni:
 libaccess-bridge-java-jni depends on libaccess-bridge-java (>= 1.26.2-5); however:
  Package libaccess-bridge-java is not configured yet.
dpkg: error processing libaccess-bridge-java-jni (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 openjdk-6-jre
 libaccess-bridge-java
 icedtea-6-jre-cacao
 libaccess-bridge-java-jni

Thanks again for any help.