Hi Guys
I'm investigated a problem we have with pgpool2 degenerate one of the databases in the cluster. JBoss messaging 1.4.8-SP2 is involved in the process and actual it happen when the statement below is executed. Since messaging communicate through pgpool I do not suspect at this point it has anything to do with messaging.
"DELETE
FROM JBM_MSG WHERE MESSAGE_ID = $1 AND NOT EXISTS (SELECT
JBM_MSG_REF.MESSAGE_ID FROM JBM_MSG_REF WHERE JBM_MSG_REF.MESSAGE_ID =
$2)"
But I got this questions from pgpool forum:
Well there some possibilities:
1) JBoss uses functions which has side effect(updating tables).
2) JBoss uses triggers which updates the table in question.
3) the transaction updating the table in question committed on node 1
but not committed on node 0 for some reason. Maybe the connection
between JBoss and pgpool between those two commit commands were
disconnected?
I have searched through the code and AFAIK messaging are not using any functions or triggers, right?
Link pgpool post http://www.pgpool.net/pipermail/pgpool-general/2012-December/001284.html
Any help will be appreciated, thanks!
Cheers,
Flemming