From: rcolmegna at tiscali.it (rcolmegna at tiscali.it)
Date: Sat, 29 Oct 2005 08:52:19 +0200
Subject: [Pljava-dev] crash due to huge load?
Message-ID: <43621A50000027DB@mail-5.mail.tiscali.sys>

due to the fact that I can change my app-behaviour, I used a small "trick"!

When the app need to begin a transaction it must make two SQL calls:
1) BEGIN;
2) INSERT INTO distribtx.bound(state) VALUES('B');

the INSERT notify to PLJava the transaction begin.

At the commit:
1) COMMIT;
2) INSERT INTO distribtx.bound(state) VALUES('C');  [executed only without
commit except]

At the rollback:
1) ROLLBACK;
2) INSERT INTO distribtx.bound(state) VALUES('R');

As you can see the remote-DB coherence is assured.

This is in theory ... in pratic I must dismiss this architecture due to pgsql
crash ...
(sigh! ... I don't want use JBoss)


---- Messaggio originale ----
Data: Fri Oct 28 20:44:32 CEST 2005
Da: Thomas Hallgren<thomas at tada.se>
A: rcolmegna at tiscali.it
Cc: pljava-dev at gborg.postgresql.org
Ccn: 
Ogg.: Re: [Pljava-dev] crash due to huge load?


I'm a bit curious. Why do you create a connection to another PG inside a
trigger? That implies that you create another transaction that is not
synchronized with the one your trigger is executing in. What happens if
(when) your original transaction is rolled back?

Regards,
Thomas Hallgren

rcolmegna at tiscali.it wrote:
> Hi,
>
> I'm using a recompiled last CVS-checkout of PLJAVA on PG8.0.3 and JDK1.5.0.
>
> I build a thread-oriented trigger (make a thread which build a connection
> to another
> PG).
>
> I obtain frequently this error msg:
>
> server closed the connection unexpectedly
> This probably means the server terminated abnormally
> before or while processing the request.
>
> But I haven't any exception on thread-handled logs (LOG4J).
>
> TIA
> Roberto Colmegna
>
>
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