CCSD ipv6 bind failures

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hi Experts,
�������������� I has few question on ccsd:
1. what is the purpose of ccsd listening on ipv4 and ipv6 addresses as follows in my 2 node HA setup? We do not use IPv6 in our setup.

netstat -antp |grep ccsd

tcp������� 0����� 0 0.0.0.0:50008�������������� 0.0.0.0:*������������������ LISTEN����� 18170/ccsd

tcp������� 0����� 0 ::1:50006������������������ :::*����������������������� LISTEN����� 18170/ccsd


CCSD is invoked without any arguments:

root���� 18170���� 1� 0 14:12 ?������� 00:00:00 /sbin/ccsd


2. Is it not sufficient to use IPv4 only by CCSD?

3. Sometimes on node reboot we see messages as follows:

"Unable to bind to backend ipv6 socket, but inet_ntop returned NULL pointer: Address already in use"

Does anyone know when is this problem seen?

4. If I invoke CCSD with "-4" option, will I get rid of the above message? since ipv6 code path will not hit.

root������ 461���� 1� 0 14:28 ?������� 00:00:00 /sbin/ccsd -4

netstat -antp� |grep ccsd

tcp������� 0����� 0 127.0.0.1:50006�������� ����0.0.0.0:*������������������ LISTEN����� 461/ccsd

tcp������� 0����� 0 0.0.0.0:50008�������������� 0.0.0.0:*������������������ LISTEN����� 461/ccsd



Regards,
Ashish
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