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Oracle ORA-24408: could not generate unique server group name PHP on Ubuntu

I am trying to setup a PHP (Ubuntu) server to connect to an Oracle database.  Installed oci8 PHP extension by following these directions:

https://help.ubuntu.com/community/PHPOracle

When I try to make my connection with oci_connect, I get:

ORA-24408: could not generate unique server group name

This article suggests downgrading to 10g, but I'd like to get it working with the latest client if possible:

http://nickshontz.wordpress.com/2011/11/29/php-oracle/

Comments suggest it might be related to a hostname problem--but I'm not clear from comments how to address the issue.  Any help much appreciated.
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scotru
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scotru
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1 Solution
 
slightwv (䄆 Netminder) Commented:
I'm only responding to a neglected question alert.  I'm not a PHP or Ubuntu person but have a lot of Unix in a previous life.

Check for a loopback.  Look at the following link in the section:  Loopback Interface

https://help.ubuntu.com/10.04/serverguide/C/network-configuration.html
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scotruAuthor Commented:
Definitely on the right track.  I had to add a hosts entry for the server's host name in the /etc/hosts file for the loopback address.

127.0.0.1    server-hostname

This fixed the problem.  I'm not clear on the difference between 127.0.0.1 and 127.0.1.1 (maybe this should be the later, but it works with the 0.0.1).
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slightwv (䄆 Netminder) Commented:
127.0.0.1 is the universal loopback address.  technically anything with 127. is also considered 'local'.
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scotruAuthor Commented:
Ah, I see-- yea, I'm familiar with 127.0.0.1, just didn't realize the whole class A was local.  

Thanks!
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