Hard gcj dependency instead of using java alternative

[Andreas Häber]

I struggled to get hsqldb-server running, and even apt-get remove hsqldb-server did not work.

Finally, first I removed gcj-jre* from my system. Secondly, I edited /etc/hsqldb.conf and set the JAVA_EXECUTABLE to point to /usr/bin/java instead of the hardcoded GCJ bin. Now hsqldb apparently starts and stops fine.

What I believe is a bug here is that hsqldb.conf points to GCJ instead of using the system configured Java alternative (controlled using update-alternative).

Here is output from trying to purge hsqldb-server. I don't know the internals of hsqldb, but apparently it tries to invoke hsqldb's init.d script to stop(?) the server. The same exception occurs when doing "sudo service hsqldb-server start|stop".

$ sudo apt-get purge hsqldb-server
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
  hsqldb-server*
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 125 kB disk space will be freed.
Do you want to continue [Y/n]? y
(Reading database ... 294919 files and directories currently installed.)
Removing hsqldb-server ...
Exception in thread "main" java.lang.NoClassDefFoundError: org.hsqldb.jdbcDriver
   at java.lang.Class.initializeClass(libgcj.so.13)
   at java.lang.Class.forName(libgcj.so.13)
   at org.hsqldb.util.RCData.getConnection(Unknown Source)
   at org.hsqldb.util.SqlTool.objectMain(Unknown Source)
   at org.hsqldb.util.SqlToolSprayer.main(Unknown Source)
Caused by: java.lang.ClassNotFoundException: java.sql.SQLFeatureNotSupportedException not found in gnu.gcj.runtime.SystemClassLoader{urls=[file:/usr/share/java/hsqldb.jar], parent=gnu.gcj.runtime.ExtensionClassLoader{urls=[], parent=null}}
   at java.net.URLClassLoader.findClass(libgcj.so.13)
   at java.lang.ClassLoader.loadClass(libgcj.so.13)
   at java.lang.ClassLoader.loadClass(libgcj.so.13)
   at java.lang.Class.forName(libgcj.so.13)
   at java.lang.Class.initializeClass(libgcj.so.13)
   ...4 more
WARNING: hsqldb is still running!
invoke-rc.d: initscript hsqldb-server, action "stop" failed.
dpkg: error processing hsqldb-server (--purge):
 subprocess installed pre-removal script returned error exit status 1
No apport report written because MaxReports is reached already
                                                              There is already a hsqldb server running with pid 10511.
invoke-rc.d: initscript hsqldb-server, action "start" failed.
dpkg: error while cleaning up:
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 hsqldb-server
E: Sub-process /usr/bin/dpkg returned an error code (1)

[Launchpad Janitor (janitor)]

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

[Mike Spainhower (mcspainhower)]

This workaround fixed my issue. Thanks Andreas!

[Jeff (carpenter-jeff+alert)]

In /etc/hsqldb.conf, I set JAVA_EXECUTABLE=/usr/bin/java and I was able to remove hsqldb.