RPM Package installation failed during HDP Upgrade

[#1]

PROBLEM:

When installing RPM during HDP Upgrade on few nodes, the installation fails with the following error:

rpmdb: /var/lib/rpm/Packages: unexpected file format or type  
error: cannot open Packages index using db3 - Invalid argument (22)

ROOT CAUSE

This issue occurs when the RPM database is corrupt.

RESOLUTION

To resolve this issue, do the following:

1. Take a backup of existing RPM database:

   mkdir /root/rpmdb.bak
   cp -rp /var/lib/rpm/__db* /root/rpmdb.bak/

2. Remove the corrupted RPM database files:

   cd /var/lib/rpm
   rm -rf __db*

3. Rebuild the RPM database:

   rpm --rebuilddb