Skip site navigation (1) Skip section navigation (2)

Re: JDBC Connection broken (followup)

From: Michael Bell <mikebell90(at)yahoo(dot)com>
To: Craig Ringer <craig(at)postnewspapers(dot)com(dot)au>, pgsql-jdbc(at)postgresql(dot)org
Subject: Re: JDBC Connection broken (followup)
Date: 2009-08-17 16:00:42
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-jdbc
Thanks for replying. I changed the pg_hba.conf to trust (I don't care about the password, this is just a test system, installed from scratch). However, unfortunately WinPCap cannot capture loopback traffic, so that doesn't help us much :)

Other side notes: tried LSPFix - it found no problems. And I use this box to test MS SQL, MySQL regularly with no issues.

----- Original Message ----
From: Craig Ringer <craig(at)postnewspapers(dot)com(dot)au>
To: pgsql-jdbc(at)postgresql(dot)org
Sent: Monday, August 17, 2009 3:17:52 AM
Subject: Re: [JDBC] JDBC Connection broken (followup)

On 17/08/2009 4:00 PM, Michael Bell wrote:
> Oh, tried this with Windows firewall off, and AV off too. Here's the logging of the last few successful, and then the unsuccessful....

It might be useful if you could:

- in pg_hba.conf, set to "trust" or change the password
  of the user you'll be testing with to something generic; then

- use Wireshark ( to capture traffic on the
  loopback interface during a failed login attempt that results in
  the "incomplete startup packet" error.

- Change pg_hba.conf back / reset the password you changed

- Post the packet trace (libpcap format) or, if it's too big, put
  it up somewhere people can download it and post a link to it.

Doing so may or may not help - but if the results look normal you at least know the client is sending the right startup packet and it's a server side problem.

"An operation was attempted on something that is not a socket" makes you wonder if the socket was closed, the backend is getting FDs (handles) mixed up, or something. I was about to suggest trying to get a log with Process Monitor (from Sysinternals) but it doesn't look like Process Monitor records TCP/IP socket activity, so it won't be much use. Sigh.

Maybe the wireshark trace will be informative...

Craig Ringer

> 2009-08-17 00:56:58 PDTLOCATION:  BackendInitialize, .\src\backend\postmaster\postmaster.c:3205
> 2009-08-17 00:56:58 PDTLOG:  XX000: could not receive data from client: An operation was attempted on something that is not a socket.
> 2009-08-17 00:56:58 PDTLOCATION:  pq_recvbuf, .\src\backend\libpq\pqcomm.c:769
> 2009-08-17 00:56:59 PDTLOG:  08P01: incomplete startup packet
> 2009-08-17 00:56:59 PDTLOCATION:  ProcessStartupPacket, .\src\backend\postmaster\postmaster.c:1469

-- Sent via pgsql-jdbc mailing list (pgsql-jdbc(at)postgresql(dot)org)
To make changes to your subscription:


In response to

pgsql-jdbc by date

Next:From: dmpDate: 2009-08-17 16:31:51
Subject: Re: JDBC connection query..
Previous:From: dmpDate: 2009-08-17 15:48:41
Subject: Re: JDBC broken connection against Postgres 8.4

Privacy Policy | About PostgreSQL
Copyright © 1996-2017 The PostgreSQL Global Development Group