rpm/mock: can't upbuild FC10 targets on FC9 host

[Philip Prindeville]

Seems to be an rpm versioning issue:

[root at builder SRPMS]# mock -r fedora-10-x86_64 --rebuild perl-Net-Patricia-1.15_01-1.fc9.src.rpm
INFO: mock.py version 0.9.14 starting...
State Changed: init plugins
State Changed: start
INFO: Start(perl-Net-Patricia-1.15_01-1.fc9.src.rpm)  Config(fedora-10-x86_64)
State Changed: lock buildroot
State Changed: clean
State Changed: init
State Changed: lock buildroot
Mock Version: 0.9.14
INFO: Mock Version: 0.9.14
INFO: enabled root cache
State Changed: unpacking root cache
INFO: enabled yum cache
State Changed: cleaning yum metadata
INFO: enabled ccache
State Changed: running yum
State Changed: setup
ERROR: Exception(perl-Net-Patricia-1.15_01-1.fc9.src.rpm) Config(fedora-10-x86_64) 0 minutes 15 seconds
INFO: Results and/or logs in: /var/lib/mock/fedora-10-x86_64/result
ERROR: Command failed: 
 # /usr/bin/yum --installroot /var/lib/mock/fedora-10-x86_64/root/  resolvedep  ccache  'perl(ExtUtils::MakeMaker)'
rpmdb: Program version 4.3 doesn't match environment version
error: db4 error(-30974) from dbenv->open: DB_VERSION_MISMATCH: Database environment version mismatch
error: cannot open Packages index using db3 -  (-30974)
error: cannot open Packages database in /var/lib/mock/fedora-10-x86_64/root/var/lib/rpm
Traceback (most recent call last):
  File "/usr/bin/yum", line 29, in <module>
    yummain.user_main(sys.argv[1:], exit_code=True)
  File "/usr/share/yum-cli/yummain.py", line 229, in user_main
    errcode = main(args)
  File "/usr/share/yum-cli/yummain.py", line 84, in main
    base.getOptionsConfig(args)
  File "/usr/share/yum-cli/cli.py", line 184, in getOptionsConfig
    enabled_plugins=self.optparser._splitArg(opts.enableplugins))
  File "/usr/lib/python2.5/site-packages/yum/__init__.py", line 192, in _getConfig
    self._conf = config.readMainConfig(startupconf)
  File "/usr/lib/python2.5/site-packages/yum/config.py", line 774, in readMainConfig
    yumvars['releasever'] = _getsysver(startupconf.installroot, startupconf.distroverpkg)
  File "/usr/lib/python2.5/site-packages/yum/config.py", line 844, in _getsysver
    idx = ts.dbMatch('provides', distroverpkg)
TypeError: rpmdb open failed

[root at builder SRPMS]# 



The host was originally an FC8 host, that was yum updated to FC9. I use
it to build FC9 and FC10 packages via Mock.

Unfortunately, it looks like it doesn't want to use the old RPM database
from the previous FC8 install.

How do I clobber all of this to that the database gets written afresh?

Apparently, "mock -r fedora-10-x86_64 --clean" isn't adequate. Perhaps
"mock --nuke" would be useful here following an version update to zap
stale state?

Or should I just uninstall and reinstall mock?

Thanks,

-Philip