Connection refused. Check that the hostname and port are correct

Hi,

I am new to PostgreSQL. I am trying to connect to my PostgreSQL database
installed on Unix. I am getting the following error message,

************************************************************ ***************
An error occured while establishing the connection.
Type: org.postgresql.util.PSQLException Error Code: 0 SQL State:
08004
Message:
Connection refused. Check that the hostname and port are correct and
that the postmaster is accepting TCP/IP connections.
Exception: java.net.ConnectException: Connection refused: connect
************************************************************ ***************

I have checked port number, user name, password and they are all
correct. I have also checked that the postmaster is also running.

*******************************
postgres 25398 25344 0 11:57:51 pts/2 0:00 psql syslog
postgres 25548 25546 0 16:01:35 pts/3 0:00
/usr/local/pgsql/bin/postmaster
postgres 25613 25580 0 16:43:01 pts/3 0:00 grep post
postgres 25344 25301 0 10:57:05 pts/2 0:00 -tcsh
postgres 25546 1 0 16:01:35 pts/3 0:00
/usr/local/pgsql/bin/postmaster
postgres 25550 25549 0 16:01:35 pts/3 0:00
/usr/local/pgsql/bin/postmaster
postgres 25549 25546 0 16:01:35 pts/3 0:00
/usr/local/pgsql/bin/postmaster
postgres 25580 25443 0 16:34:17 pts/3 0:00 -tcsh
*******************************

I have the following settings in my configuration file

******************
host syslog sysloguser 10.10.10.10/32 trust
host syslog sysloguser 192.168.0.0/32 trust
*****************

Please advice what am I doing wrong

--

Thanks and Regards
Omer Mustafa
Oracle Application DBA
omustafa@internode.com.au
Internode, Level 1, 132 Grenfell Street
ADELAIDE SA 5000
Ph: 08 8228 2379
Mobile # 0421 038839

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Re: Connection refused. Check that the hostname and port

On Thu, 20 Jul 2006, Omer Mustafa wrote:

> Connection refused. Check that the hostname and port are correct and that
> the postmaster is accepting TCP/IP connections.
> Exception: java.net.ConnectException: Connection refused: connect
> ************************************************************ ***************
>
> I have checked port number, user name, password and they are all correct. I
> have also checked that the postmaster is also running.

Most likely the postgresql server is set to listen for unix socket connections
and/or connections from localhost only. Look for the following in your
postgresql.conf file:

#listen_addresses = 'localhost' # what IP interface(s) to listen on;
# defaults to localhost, '*' = any

You most likely want to change that to:

listen_addresses = '*'

That's from an 8.x config file. If you have an older version the terminology
is likely different, but the effect is similar.

--
Jeff Frost, Owner
Frost Consulting, LLC http://www.frostconsultingllc.com/
Phone: 650-780-7908 FAX: 650-649-1954

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Re: Connection refused. Check that the hostname and port

Please do not remove the list from the Cc when replying.

On Thu, 27 Jul 2006, Omer Mustafa wrote:

> FATAL: no pg_hba.conf entry for host "203.26.95.33", user "sysloguser",
> database "syslog"
>
> but i have this entry in my pg_hba file.

Most likely it is because you didn't reload the postgresql service after
making the changes or because it is matching another entry first. The
pg_hba.conf is parsed in a top down manner with the first match winning.
Post your pg_hba.conf and we can likely help you. Remember that you must
reload the postgresql service after making changes.


>
> Jeff Frost wrote:
>> On Thu, 20 Jul 2006, Omer Mustafa wrote:
>>
>>> Connection refused. Check that the hostname and port are correct and
>>> that the postmaster is accepting TCP/IP connections.
>>> Exception: java.net.ConnectException: Connection refused: connect
>>> ************************************************************ ***************
>>>
>>> I have checked port number, user name, password and they are all correct.
>>> I have also checked that the postmaster is also running.
>>
>> Most likely the postgresql server is set to listen for unix socket
>> connections and/or connections from localhost only. Look for the following
>> in your postgresql.conf file:
>>
>> #listen_addresses = 'localhost' # what IP interface(s) to listen on;
>> # defaults to localhost, '*' = any
>>
>> You most likely want to change that to:
>>
>> listen_addresses = '*'
>>
>> That's from an 8.x config file. If you have an older version the
>> terminology is likely different, but the effect is similar.
>>
>
>

--
Jeff Frost, Owner
Frost Consulting, LLC http://www.frostconsultingllc.com/
Phone: 650-780-7908 FAX: 650-649-1954

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Re: Connection refused. Check that the hostname and port are correct

------=_Part_153058_18311491.1153988632444
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

That appears to be the JDBC driver is not able to connect to the PostgreSQL
database.

Try out the following:

- See if there is any firewall running, run 'iptables -F" on the database
server machine to disable it for a while and then test the same Java code
- Check the routing tables info and see if there is anything missing there.
- If the above two are okay and still its not connecting try out settng the
following in your pg_hba.conf file:

host all all 127.0.0.1/32 trust
host all all 0.0.0.0/0 trust

and then do a 'pg_ctl reload' and see if that now lets you connect through
the JDBC driver or not locally and over the lan.

Thanks,

--
Shoaib Mir
EnterpriseDB (www.enterprisedb.com)

On 7/20/06, Omer Mustafa wrote:
>
> Hi,
>
> I am new to PostgreSQL. I am trying to connect to my PostgreSQL database
> installed on Unix. I am getting the following error message,
>
>
> ************************************************************ ***************
> An error occured while establishing the connection.
> Type: org.postgresql.util.PSQLException Error Code: 0 SQL State:
> 08004
> Message:
> Connection refused. Check that the hostname and port are correct and
> that the postmaster is accepting TCP/IP connections.
> Exception: java.net.ConnectException: Connection refused: connect
>
> ************************************************************ ***************
>
> I have checked port number, user name, password and they are all
> correct. I have also checked that the postmaster is also running.
>
> *******************************
> postgres 25398 25344 0 11:57:51 pts/2 0:00 psql syslog
> postgres 25548 25546 0 16:01:35 pts/3 0:00
> /usr/local/pgsql/bin/postmaster
> postgres 25613 25580 0 16:43:01 pts/3 0:00 grep post
> postgres 25344 25301 0 10:57:05 pts/2 0:00 -tcsh
> postgres 25546 1 0 16:01:35 pts/3 0:00
> /usr/local/pgsql/bin/postmaster
> postgres 25550 25549 0 16:01:35 pts/3 0:00
> /usr/local/pgsql/bin/postmaster
> postgres 25549 25546 0 16:01:35 pts/3 0:00
> /usr/local/pgsql/bin/postmaster
> postgres 25580 25443 0 16:34:17 pts/3 0:00 -tcsh
> *******************************
>
> I have the following settings in my configuration file
>
> ******************
> host syslog sysloguser 10.10.10.10/32 trust
> host syslog sysloguser 192.168.0.0/32 trust
> *****************
>
> Please advice what am I doing wrong
>
> --
>
> Thanks and Regards
> Omer Mustafa
> Oracle Application DBA
> omustafa@internode.com.au
> Internode, Level 1, 132 Grenfell Street
> ADELAIDE SA 5000
> Ph: 08 8228 2379
> Mobile # 0421 038839
>
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> TIP 5: don't forget to increase your free space map settings
>

------=_Part_153058_18311491.1153988632444
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

That appears to be the JDBC driver is not able to connect to the PostgreSQL database.

Try out the following:

- See if there is any firewall running, run 'iptables -F" on the database server machine to disable it for a while and then test the same Java code

- Check the routing tables info and see if there is anything missing there.
- If the above two are okay and still its not connecting try out settng the following in your pg_hba.conf file:

host    all         all        
         trust

and then do a 'pg_ctl reload' and see if that now lets you connect through the JDBC driver or not locally and over the lan.


Thanks,

--
Shoaib Mir
EnterpriseDB ()