Question

PostgreSQL problem (incomplete startup packet)

Asked by: Phil_Crusader

I've run into a problem which I'm having a hard time fixing... a few couple of months ago I've switched from a jsp reporting scheme to one using datavision.  I've field tested it for a few weeks and it was ok.  However, when writing a very complex script it started creating errors on the client side which came up something like:

    Could not create Connection: Cannot create PoolableConnectionFactory (
            An I/O error occured while reading from backend - Exception: java.net.SocketException:
            Connection reset Stack Trace: java.net.SocketException:
            Connection reset at java.net.SocketInputStream.read(Unknown Source) at
            java.io.BufferedInputStream.fill(Unknown Source) at
            java.io.BufferedInputStream.read(Unknown Source) at
            org.postgresql.core.PGStream.ReceiveChar(PGStream.java:166) at
            org.postgresql.jdbc1.AbstractJdbc1Connection.openConnectionV3(AbstractJdbc1Connection.java:291) at
            org.postgresql.jdbc1.AbstractJdbc1Connection.openConnection(AbstractJdbc1Connection.java:213) at
            org.postgresql.Driver.connect(Driver.java:139) at
            .....

At first, I thought maybe it was my script... so I tried running the script from PgAdmin (at this point I haven't done anything with the connection) and the script ran fine... so I tried restarting postmaster.. which didn't work.  After which I tried restarting the server, this seemed to have remedied the problem.  This was a couple of days after the problem surfaced... now I get this message almost every time and restarting doesn't seem to help, PgAdmin likewise cannot access the database as well.  I've been looking around and initially thought it may be just a jdbc problem... however when I took a look at the postmaster logs I got...

            2005-04-29 20:18:56 LOG:  database system was shut down at 2005-04-29 20:18:34 China Standard Time
            2005-04-29 20:18:56 LOG:  checkpoint record is at 0/201A178
            2005-04-29 20:18:56 LOG:  redo record is at 0/201A178; undo record is at 0/0; shutdown TRUE
            2005-04-29 20:18:56 LOG:  next transaction ID: 6344; next OID: 18598
            2005-04-29 20:18:56 LOG:  database system is ready
            2005-04-29 20:23:47 LOG:  could not receive data from client: An operation was attempted on something that is not a socket.
            2005-04-29 20:23:47 LOG:  incomplete startup packet
            2005-04-29 20:23:48 LOG:  could not receive data from client: An operation was attempted on something that is not a socket.
            2005-04-29 20:23:48 LOG:  incomplete startup packet

I am unsure if my complex scripts had anything to do with this, however, I don't believe this that was the root of the problem.  Has anyone encountered similar scenarios?

I placed this problem on the back-burner since it was for non-essential upgrades... needless to say, I have more time on my hands now so I'm revisiting the problem...

--

Regards,

Kal Chung

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Asked On
2005-08-19 at 02:13:50ID21532698
Tags

startup

,

incomplete

,

packet

,

postgresql

Topic

PostgreSQL Database

Participating Experts
3
Points
0
Comments
17

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Answers

 

by: earthman2Posted on 2005-08-20 at 06:21:08ID: 14715529

Is this a problem with your SSL keys ?

 

by: gheistPosted on 2005-08-21 at 09:46:20ID: 14719446

Is firewall involved ???

 

by: Phil_CrusaderPosted on 2005-08-21 at 22:28:10ID: 14721935

Nope not a problem with the SSL keys... yes I have a firewall installed Zonealarm Security Suite version 6.0.631 .  Although I don't think the firewall is the issue since I'm pretty sure I got the settings right and the firewall has been there since the time I built the application, and I've only run into problems that one time.

Just an added info.. the production version of the application runs fine... however, the problem is specific to the development machine (which is my laptop, formatting and reinstalling everything is not an option for me right now)..

Could it be due to a dump file or some config file on the postgeSQL side that hasn't been cleaned up properly?

 

by: gheistPosted on 2005-08-21 at 22:40:44ID: 14721968

No, there is no problem with PostgreSQL. It handles the situation when your firewall drops connection. Your app does not.

 

by: Phil_CrusaderPosted on 2005-08-21 at 22:57:29ID: 14722020

Ahhhh.... ok... but I was referring to uncleaned files let say from a bad program termination... such as power failure and the such.  Since I remember from my tests before that the postmaster.pid sometimes gets left behind and prevents postgreSQL from starting... was just wondering if perhaps a similar situation is happening here... except with a different file...

 

by: earthman2Posted on 2005-08-21 at 23:48:27ID: 14722169

I think I had the same symptoms once where I had the wrong  JDBC jar file in the CLASSPATH.

 

by: Phil_CrusaderPosted on 2005-08-22 at 00:28:47ID: 14722302

I'm not sure if that's it... since even the standalone postgreSQL clients can't connect to my local db, it can connect to external dbs though...  I know the db is running bec of the logs and the started status in the windows services window...  I'll take a look at my classpath just in case...

 

by: earthman2Posted on 2005-08-22 at 01:18:08ID: 14722485

Could it be that you are connecting to a Unix socket on a windows machine ?

Try modifying your connection string to go via the TCP/IP loopback socket 127.0.0.1

Make sure that you can ping 127.0.0.1

Does psql work locally ?

 

by: gheistPosted on 2005-08-22 at 01:30:37ID: 14722531

Or probably you use driver v7 with database v8 or smth like that ( latest driver is best in all uses)

 

by: Phil_CrusaderPosted on 2005-08-22 at 10:44:15ID: 14726453

I have also tried using 127.0.0.1, ping doesn't work... haven't tried psql yet though....  I'm a bit iffy on the driver though since the latest PgAdmin III which was supposedly paired with version 8 of postgres so it should be using the same drivers (I've tried reinstalling PgAdmin III as well)...

In anycase, I was going to try reinstalling postgres... however, while downloading a more up to date copy of postgres I also tried downloading phpPgAdmin from sourceforge... funny thing is after I've downloaded both I tried installing phpPgAdmin then did a quick reboot (actually there was a power failure and since my laptop's battery is already dead it died).  When power was restored I started the laptop and lo and behold it started working again... quite weird....

I haven't reinstalled postgreSQL yet at this point, only phpPgAdmin I used phpPgAdmin first, since I was hoping that would at least work... when it worked I tried the existing installation of PgAdmin III then my application(all seemed to work).   A very weird set of circumstances... and I have no idea what fixed it.... I'll keep monitoring it for a while and post back some status on the forum for documentation purposes...

gheist, earthman2 thanks for your input... I'll keep you posted on this and will post back again if there are any recurring problems...

 

by: Phil_CrusaderPosted on 2005-09-09 at 00:25:23ID: 14850382

Apparently that was wishful thinking, after a week or two the problem resurfaced... I have also attemped to reinstall PostgreSQL with no avail.  I noted seeing something regarding this problem in msn just yesterday... I will have a look at that and update my findings here...

If anyone has any other suggestions please feel free to add your two cents :)

 

by: Phil_CrusaderPosted on 2005-09-11 at 17:12:28ID: 14860960

The problem seems to be related to the LSP, after downloading and running WinsockXPFix the problem was resolved.... I had to reconfigure some of the network options again, however, that was acceptable...

 

by: Phil_CrusaderPosted on 2005-09-14 at 08:40:06ID: 14881723

Earthman2 & gheist,

Thanks for helping me out...  although I had the question closed... I'd like to award each of you 50 points for your time and effort...

http://www.experts-exchange.com/Databases/PostgreSQL/Q_21561261.html

when you have both placed posts on the thread I'll go ahead and award them...

 

by: earthman2Posted on 2005-09-15 at 06:26:46ID: 14889010

What is LSP ?

 

by: gheistPosted on 2005-09-15 at 07:52:03ID: 14889787

Traffic shaping .... like RSVP but as you see with even worse drawbacks....

 

by: moduloPosted on 2005-09-16 at 01:00:42ID: 14896169

Closed, 250 points refunded.

modulo
Community Support Moderator

20120131-EE-VQP-002

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