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Re: Connection Problem

From: Rob Stone <robstone(at)mira(dot)net>
To: Radosław Smogura <rsmogura(at)softperience(dot)eu>
Cc: Dave Cramer <pg(at)fastcrypt(dot)com>, Oliver Jowett <oliver(at)opencloud(dot)com>, pgsql-jdbc(at)postgresql(dot)org
Subject: Re: Connection Problem
Date: 2010-12-10 13:15:48
Message-ID: 1291986948.3668.6.camel@roblaptop.localdomain (view raw or flat)
Thread:
Lists: pgsql-jdbc
Hi Radoslaw,

A Thomas Markus sent me a workaround. See below.

---
maybe this is your problem 
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=560056

try to start your java class with -Djava.net.preferIPv4Stack=true
---

Using the -D option running java works. 

Now to sort out my l0 issue!!


Thanks to everybody for your assistance. At first glance I thought it
was a JDBC issue and I'm sorry to have troubled you all when it is
related to something entirely different.

Regards,
Rob



On Fri, 2010-12-10 at 04:38 -0500, Radosław Smogura wrote:
> Hi,
> 
> I think you have badly configured routing table, I don't see there  
> loopback routing (lo device)
> You should have line like this (lo - ended, 3rd line).
> 
> 217.118.24.64   0.0.0.0         255.255.255.192 U     0      0        0 eth0
> 169.254.0.0     0.0.0.0         255.255.0.0     U     0      0        0 eth0
> 127.0.0.0       0.0.0.0         255.0.0.0       U     0      0        0 lo
> 0.0.0.0         217.118.24.65   0.0.0.0         UG    0      0        0 eth0
> 
> I believe that you can connect to postmaster at IP 187.65.254.157 (if  
> it's not your dynamic address). After calling
> route add -net 127.0.0.0
> you should connect as well.
> 
> Check if you started all network interfaces at boot. Linux  
> distributions makes its different, you will need to call  
> /etc/init.d/*.lo or ifup lo from command line. Eventually check  
> /etc/sysconfig/network/ifcfg-lo there should be something like  
> STARTMODE=onboot
> 
> I really wonder how you connect to http://localhost if you don't have  
> route to it. I hope this helps you.
> 
> Kind regards,
> Radosław smogura
> http://softperience.eu
> Cytowanie Rob Stone <robstone(at)mira(dot)net>:
> 
> > Hi Radek,
> >
> > Output from those commands attached.
> >
> > I always completely shutdown my laptop and pull the plug. So, it is
> > doing a complete cold boot each time.
> >
> > When I try connecting to the database with ExecuteQuery, the same error
> > is returned for both "localhost" and 127.0.0.1, when entering those
> > values as the "host" on the connection dialogue.
> >
> > Via a browser, if I access http://localhost it returns the "It Work's!"
> > output from apache.
> >
> > Thanks to everybody for your help.
> >
> > Cheers,
> > Rob
> >
> >
> >
> > On Thu, 2010-12-09 at 15:43 -0500, Radosław Smogura wrote:
> >> Hi,
> >>
> >> Check with netstat -atnp (it shows the process associated with port),
> >> but psql should be there.
> >>
> >> Do route -n to see routing traces, execute ifconfig next.
> >>
> >> But this can be kernel driver problem. Do you "shut down" laptop by
> >> closing it, I mean do you put it in sleep mode? Maybe you need to
> >> restart network interfaces instead.
> >>
> >> On my PC when I put it on sleep mode, SATA controller doesn't wakes up.
> >>
> >> Kind regards,
> >> Radek Smogura
> >> > Rob,
> >> >
> >> > Have you tried 127.0.0.1 instead of localhost ? It's not that it isn't
> >> > listening, the problem is there is no route to localhost which seems
> >> > strange on it's own.
> >> >
> >> > Dave
> >> >
> >> > On Thu, Dec 9, 2010 at 8:18 AM, Rob Stone <robstone(at)mira(dot)net> wrote:
> >> >> Hi Oliver,
> >> >>
> >> >> Thanks for the reply.
> >> >>
> >> >> Output from netstat shows port 5432 as being listened. Don't know what
> >> >> to try next.
> >> >>
> >> >> Sometimes when I shut down my laptop the "stop" messages are displayed.
> >> >> I noticed last night that pg_ctl could not find the postmaster.pid file,
> >> >> even though PGHOST and PGDATA variables are set. I'm starting it with
> >> >> the -i and -D options with -D pointing explicitly to the PGDATA path
> >> >> using the full path name. Could not finding a postmaster.pid file be
> >> >> linked in any way with my problem??
> >> >>
> >> >>
> >> >> Cheers,
> >> >> Rob
> >> >>
> >> >> rob(at)roblaptop:~> netstat -ln --tcp
> >> >> Active Internet connections (only servers)
> >> >> Proto Recv-Q Send-Q Local Address           Foreign Address
> >> >> State
> >> >> tcp        0      0 0.0.0.0:22              0.0.0.0:*
> >> >> LISTEN
> >> >> tcp        0      0 127.0.0.1:631           0.0.0.0:*
> >> >> LISTEN
> >> >> tcp        0      0 0.0.0.0:5432            0.0.0.0:*
> >> >> LISTEN
> >> >> tcp        0      0 0.0.0.0:58112           0.0.0.0:*
> >> >> LISTEN
> >> >> tcp        0      0 0.0.0.0:2049            0.0.0.0:*
> >> >> LISTEN
> >> >> tcp        0      0 0.0.0.0:44739           0.0.0.0:*
> >> >> LISTEN
> >> >> tcp        0      0 0.0.0.0:6566            0.0.0.0:*
> >> >> LISTEN
> >> >> tcp        0      0 0.0.0.0:60135           0.0.0.0:*
> >> >> LISTEN
> >> >> tcp        0      0 0.0.0.0:111             0.0.0.0:*
> >> >> LISTEN
> >> >> tcp6       0      0 :::22                   :::*
> >> >> LISTEN
> >> >> tcp6       0      0 ::1:631                 :::*
> >> >> LISTEN
> >> >> tcp6       0      0 :::5432                 :::*
> >> >> LISTEN
> >> >> tcp6       0      0 :::6566                 :::*
> >> >> LISTEN
> >> >> tcp6       0      0 :::80                   :::*
> >> >> LISTEN
> >> >> rob(at)roblaptop:~>
> >> >>
> >> >>
> >> >>
> >> >>
> >> >> On Wed, 2010-12-08 at 08:52 +1300, Oliver Jowett wrote:
> >> >>> On 08/12/10 02:29, Rob Stone wrote:
> >> >>>
> >> >>> > Wrote a mickey mouse java class (testdbconn) to see if I could access
> >> >>> > the database and read data from a table that has two rows.  
> >> See attached.
> >> >>> > When it runs it displays the same SQL error code as ExecuteQuery --
> >> >>> > 08001 -- which is the "can't connect error".
> >> >>>
> >> >>> You have a network configuration problem of some sort:
> >> >>>
> >> >>> > Caused by: java.net.SocketException: Network is unreachable
> >> >>>
> >> >>> (This isn't "connection refused", it's "I have no configured route to
> >> >>> that address")
> >> >>>
> >> >>> Oliver
> >> >>
> >> >>
> >> >>
> >> >> --
> >> >> Sent via pgsql-jdbc mailing list (pgsql-jdbc(at)postgresql(dot)org)
> >> >> To make changes to your subscription:
> >> >> http://www.postgresql.org/mailpref/pgsql-jdbc
> >> >>
> >> >
> >> > --
> >> > Sent via pgsql-jdbc mailing list (pgsql-jdbc(at)postgresql(dot)org)
> >> > To make changes to your subscription:
> >> > http://www.postgresql.org/mailpref/pgsql-jdbc
> >> >
> >>
> >>
> >
> >
> 
> 



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