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This bug is created as a clone of upstream ticket:
https://fedorahosted.org/freeipa/ticket/5266

If more entries are added into /etc/hosts during installation (ip4+ip6), after uninstall, only the last added entry is removed from /etc/hosts.

This is caused by multiple backups of /etc/host (backup created after each change) 

{{{
2015-08-27T12:25:13Z DEBUG Backing up system configuration file '/etc/hosts'
2015-08-27T12:25:13Z DEBUG Saving Index File to '/var/lib/ipa/sysrestore/sysrestore.index'
2015-08-27T12:25:13Z DEBUG Backing up system configuration file '/etc/hosts'
2015-08-27T12:25:13Z DEBUG Saving Index File to '/var/lib/ipa/sysrestore/sysrestore.index'
}}}

Fixed upstream
ipa-4-2:
https://fedorahosted.org/freeipa/changeset/af10e865f7c60e19f6f487968a3ba7018c98a325
master:
https://fedorahosted.org/freeipa/changeset/0bcf0c1be9be99a0301051eef048fac9b178f735

Created attachment 1080211 [details]
Verify log for bz

Verified 

ipa-server-4.2.0-12.el7.x86_64

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2015-2362.html