yes,I am sure that I connect to the same database and same machine.
because I run my test code at the linux server with telnet.
As you said,it likes some security modules inhibit to make a new connection.
My server is Redhat Linux Enterprice version with typical installation.and I don't know about
SELinux/Apparmor/TOMOYO/SMACK
----- Original Message -----
From: "Craig Ringer" <craig@postnewspapers.com.au>
To: "李紅兵" <lihongbing@intasect.com.cn>
Cc: "John R Pierce" <pierce@hogranch.com>; <pgsql-bugs@postgresql.org>
Sent: Wednesday, May 11, 2011 2:17 PM
Subject: Re: [BUGS] BUG #5994: Can't excute DBI->connect to oracle by client site
> On 11/05/11 13:53, 李紅兵 wrote:
>> Perhaps you misunderstanding what I mean.
>> I can connect to postgreSQL server correctly,
>> but When I connect postgreSQL with TCP Sockets, it return error to
>> connect to oracle server by DBI->connect from perlu script.
>>
>> When I connect postgreSQL with Unix Domain Sockets,it works well.
>
> Are you _certain_ that you're connecting to the same database on the
> same machine when you use TCP vs unix sockets? The simplest explanation
> for this problem would be that you're running different test perlu code
> or running it on different machines/DBs when connecting via TCP than
> when connecting via unix socket.
>
> If that's not the case, about the only thing I can imagine is some weird
> kernel security module getting in the way. Maybe something that tries to
> isolate processes started as a result of tcp/ip connections so they
> can't make new connections themselves, or something crazy like that. You
> wouldn't happen to be on a box with SELinux/Apparmor/TOMOYO/SMACK/etc,
> would you?
>
> --
> Craig Ringer
>
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