Description of problem:
When i use the spacewalk-setup to setup my spacewalk server, the error occured. I've search google for answer, but it turn out nothing.

* Configuring tomcat.
Reversed (or previously applied) patch detected!  Skipping patch.
1 out of 1 hunk ignored -- saving rejects to file web.xml.rej
* Configuring jabberd.
* Creating SSL certificates.
** SSL: Generating CA certificate.
Could not generate CA certificate.  Exit value: 1.
Please examine /var/log/rhn/rhn-installation.log for more information.

Version-Release number of selected component (if applicable):
spacewalk 1.6 and i use postgre 8.4.7 

How reproducible:
Not quite sure. I am configure it several times since the tomcat is always not working. But suddenly the postgres failled to populate the database. when rebuild the postgre by setting a new db and dbuser. The postgres works again, but another error shows up:
     Could not generate CA certificate.
 
Actual results:
The Logs shows that:
Installation log of Spacewalk
Command: /usr/bin/spacewalk-setup

Enabling spacewalk services...
Done
/root/.gnupg/pubring.gpg
------------------------
pub   1024D/F24F1B08 2002-04-23 [expired: 2004-04-22]
uid                  Red Hat, Inc (Red Hat Network) <rhn-feedback>

gpg: key F24F1B08: "Red Hat, Inc (Red Hat Network) <rhn-feedback>" not changed
gpg: Total number processed: 1
gpg:              unchanged: 1
/var/lib/rhn/rhn-satellite-prep/etc/rhn/cluster.ini
/var/lib/rhn/rhn-satellite-prep/etc/rhn/rhn.conf.orig
/var/lib/rhn/rhn-satellite-prep/etc/rhn/rhn.conf
/var/lib/rhn/rhn-satellite-prep/etc -> /etc
/var/lib/rhn/rhn-satellite-prep/etc/rhn -> /etc/rhn
/var/lib/rhn/rhn-satellite-prep/etc/rhn/cluster.ini -> /etc/rhn/cluster.ini
 * Making backup of /etc/rhn/cluster.ini to /etc/sysconfig/rhn/backup-2011-10-17-10:32/etc/rhn/cluster.ini
/var/lib/rhn/rhn-satellite-prep/etc/rhn/rhn.conf -> /etc/rhn/rhn.conf
 * Making backup of /etc/rhn/rhn.conf to /etc/sysconfig/rhn/backup-2011-10-17-10:32/etc/rhn/rhn.conf

...working...error: not an rpm package

ERROR: unhandled exception occurred:
Generating private CA key: /root/ssl-build/RHN-ORG-PRIVATE-SSL-KEY
Rotated: RHN-ORG-PRIVATE-SSL-KEY --> RHN-ORG-PRIVATE-SSL-KEY.1

Generating public CA certificate: /root/ssl-build/RHN-ORG-TRUSTED-SSL-CERT
Using distinguishing variables:
    --set-country      = "CN"
    --set-state        = "ZheJiang"
    --set-city         = "HangZhou "
    --set-org          = "Spacewalk Org"
    --set-org-unit     = "spacewalk"
    --set-common-name  = "HuaWei"
    --set-email        = ""
Rotated: RHN-ORG-TRUSTED-SSL-CERT --> RHN-ORG-TRUSTED-SSL-CERT.1
Traceback (most recent call last):
  File "/usr/bin/rhn-ssl-tool", line 58, in <module>
    sys.exit(mod.main() or 0)
  File "/usr/share/rhn/certs/rhn_ssl_tool.py", line 1229, in main
    ret = _main() or 0
  File "/usr/share/rhn/certs/rhn_ssl_tool.py", line 1176, in _main
    genCaRpm(DEFS, options.verbose)
  File "/usr/share/rhn/certs/rhn_ssl_tool.py", line 703, in genCaRpm
    filename = sortRPMs(filenames)[-1]
  File "/usr/lib/python2.6/site-packages/spacewalk/common/rhn_rpm.py", line 299, in sortRPMs
    helper = map(lambda x: (get_package_header(x), x), rpms)
  File "/usr/lib/python2.6/site-packages/spacewalk/common/rhn_rpm.py", line 299, in <lambda>
    helper = map(lambda x: (get_package_header(x), x), rpms)
  File "/usr/lib/python2.6/site-packages/spacewalk/common/rhn_rpm.py", line 214, in get_package_header
    hdr = SHARED_TS.hdrFromFdno(file_desc)
  File "/usr/lib64/python2.6/site-packages/rpm/transaction.py", line 154, in hdrFromFdno
    raise rpm.error("error reading package header")
_rpm.error: error reading package header


   Really need help, i am really stucked!