UPCP failed cPanel : TIMEOUT: RPM DB is not responding

The cPanel update failed with the following error:

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[20130622.035505] Detected version '11.36.1.6' from version file.
[20130622.035505] Target version set to '11.36.1.8'
[20130622.035505] Checking license
[20130622.035509] License file check complete
[20130622.035509] Checking that the RPM DB is OK...
[20130622.040509] TIMEOUT: RPM DB is not responding after 10 minutes.
[20130622.040509] E Blocker found: Your RPM database appears unstable. It is not possible at the moment to install a simple RPM.
[20130622.040509] ***** FATAL: An attempt to up/downgrade to 11.36.1.8 was blocked. Please review blockers.
[20130622.040509] The Administrator will be notified to review this output when this script completes
[20130622.040509] E Detected events which require user notification during updatenow. Will send iContact the log
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RPM database is corrupted which is causing this problem:

Fix : -
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mkdir /root/old_rpm_dbs/
mv /var/lib/rpm/__db* /root/old_rpm_dbs/
rpm –rebuilddb

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