Re: Very Dangerous bug in XA connection pooling and SL EJBs with jboss-4.2.3 & latest postgresql-8.4-701.jdbc3.jar

Thanx a lot! Good job!
btw what an evil coincidence, we have been haunted by this for nearly 2 years now.

Στις Wednesday 03 March 2010 21:43:41 ο/η Heikki Linnakangas έγραψε:
> Okay, thanks, I see what's going on now.
>
> There's two things contributing to this:
>
> * When you call setAutoCommit(false) on a connection acquired from a
> PGXAConnection, in a local transaction, and subsequently use the
> connection for XA transaction, the driver puts the connection back into
> autocommit mode. Looking at the JDBC spec, I don't think the driver
> should be doing that; when the XA transaction ends, autocommit mode
> should be restored to whatever it was before.
>
> * Even though you explicitly call setAutoCommit(false) in the 2nd
> invocation of the java block, JBoss intercepts the call and turns it
> into a no-op, because it remembers that setAutoCommit(false) was already
> called on the connection in the first invocation of that. But the driver
> turned on autocommit mode behind its back, so the connection is in fact
> in autocommit mode even though JBoss thinks it's not, and despite the
> application explicitly called setAutoCommit(false).
>
> Sometimes I want to punch the designers of the JTA API in the face, it's
> unnecessarily complicated with all those interactions between local and
> XA transactions, sharing connections between transactions, transaction
> suspend/resume etc. But it is what it is and we have to live with it :-(.
>
> Attached is a patch to fix the issue by remembering the autocommit
> status of the connection when an XA transaction is started and to
> restore it after it ends (fix-jboss-autocommit-issue-2.patch).
>
> While we're at it, the other attached patch includes the changes from
> the first patch, plus some sanity checks. It throws an error if you call
> setAutoCommit/commit/rollback/setSavePoint in an XA transaction. That's
> forbidden according to the JDBC spec, but we haven't enforced it before
> (the behavior is not well-defined if you do it). It also throws an error
> if you call XAResource.commit(..., true) (ie. COMMIT PREPARED) using a
> connection that's being used for a local transaction. That currently
> silently commits the local transaction, which is bad. It adds another
> layer of reflection the calls on Connection objects, but that shouldn't
> be that performance critical, correctness is much more important.
>
> Attached is also a stand-alone test case exhibiting the same sequence of
> calls that JBoss produced in this scenario, so that we have that
> archived for future reference.
>
> Achilleas Mantzios wrote:
> > Your test case worked as you described.
> > I send you an ear app which you can deploy in a jboss-4.2.x, Postgresql must be defined as <jndi-name>pgsql</jndi-name>
> > in xa-datasource inside jboss's deploy dir.
> > You can go to the app by hitting: http://localhost/xabug and looking at the directions there.
> >
> > Again, thanx for caring, and lets see if you can figure smth out off this.
> >
> > Στις Wednesday 03 March 2010 14:25:20 ο/η Heikki Linnakangas έγραψε:
> >> Thanks!
> >>
> >> I tried to reproduce that with the attached test program. It's doing
> >> essentially the same thing you did, right? The program works fine here,
> >> producing a log identical to what you sent, except that I'm not seeing
> >> the incorrect behavior you're seeing; the INSERT in the 2nd java block
> >> is wrapped with BEGIN/COMMIT just like the 1st one.
> >>
> >> I don't understand why we're seeing different behavior with what should
> >> be the same sequence of calls as far as the driver is concerned. Can you
> >> try the attached patch, rerun the test case, and send over the logs
> >> again? The patch adds some logging to see all the setAutoCommit() and
> >> commit/rollback calls, maybe that sheds some light on this.
> >>
> >> BTW, you are using a recent version of the driver, right? There was some
> >> fixes to setAutoCommit() and XA interactions a few years ago.
> >>
> >> Achilleas Mantzios wrote:
> >>> Thanx
> >>> Here are the logs:
> >>>
> >>> call to the ejb
> >>> =========
> >>> 2010-03-03 12:47:57,177 INFO [STDOUT] 12:47:57.177 (2) XAResource 1291479: starting transaction xid = < 131075, 26, 24, 1-a09c8d8:d10e:4b8e3e06:32a09c8d8:d10e:4b8e3e06:34 >
> >>> 2010-03-03 12:47:57,181 INFO [STDOUT] 12:47:57.180 (2) simple execute, handler=org(dot)postgresql(dot)jdbc2(dot)AbstractJdbc2Statement$StatementResultHandler(at)dd0f87, maxRows=0, fetchSize=0, flags=1
> >>> 2010-03-03 12:47:57,184 INFO [STDOUT] 12:47:57.183 (2) FE=> Parse(stmt=S_1,query="BEGIN",oids={})
> >>> 2010-03-03 12:47:57,185 INFO [STDOUT] 12:47:57.184 (2) FE=> Bind(stmt=S_1,portal=null)
> >>> 2010-03-03 12:47:57,185 INFO [STDOUT] 12:47:57.185 (2) FE=> Execute(portal=null,limit=0)
> >>> 2010-03-03 12:47:57,186 INFO [STDOUT] 12:47:57.186 (2) FE=> Parse(stmt=null,query="select apptblidval,colname from status where assettable=$1 and assetidval=$2 and appname=$3 and apptblname=$4 and status=$5 and isvalid order by apptblidval",oids={1043,23,1043,1043,1043})
> >>> 2010-03-03 12:47:57,188 INFO [STDOUT] 12:47:57.187 (2) FE=> Bind(stmt=null,portal=null,$1=<'mariner'>,$2=<'14173'>,$3=<'Crew'>,$4=<'marinercourses'>,$5=<'warn'>)
> >>> 2010-03-03 12:47:57,189 INFO [STDOUT] 12:47:57.189 (2) FE=> Describe(portal=null)
> >>> 2010-03-03 12:47:57,190 INFO [STDOUT] 12:47:57.190 (2) FE=> Execute(portal=null,limit=0)
> >>> 2010-03-03 12:47:57,192 INFO [STDOUT] 12:47:57.192 (2) FE=> Sync
> >>> 2010-03-03 12:47:57,199 INFO [STDOUT] 12:47:57.199 (2) <=BE ParseComplete [S_1]
> >>> 2010-03-03 12:47:57,200 INFO [STDOUT] 12:47:57.200 (2) <=BE BindComplete [null]
> >>> 2010-03-03 12:47:57,200 INFO [STDOUT] 12:47:57.200 (2) <=BE CommandStatus(BEGIN)
> >>> 2010-03-03 12:47:57,201 INFO [STDOUT] 12:47:57.201 (2) <=BE ParseComplete [null]
> >>> 2010-03-03 12:47:57,202 INFO [STDOUT] 12:47:57.201 (2) <=BE BindComplete [null]
> >>> 2010-03-03 12:47:57,202 INFO [STDOUT] 12:47:57.202 (2) <=BE RowDescription(2)
> >>> 2010-03-03 12:47:57,203 INFO [STDOUT] 12:47:57.203 (2) <=BE CommandStatus(SELECT)
> >>> 2010-03-03 12:47:57,203 INFO [STDOUT] 12:47:57.203 (2) <=BE ReadyForQuery(T)
> >>> 2010-03-03 12:47:57,206 INFO [STDOUT] 12:47:57.204 (2) XAResource 1291479: ending transaction xid = < 131075, 26, 24, 1-a09c8d8:d10e:4b8e3e06:32a09c8d8:d10e:4b8e3e06:34 >
> >>> 2010-03-03 12:47:57,211 INFO [STDOUT] 12:47:57.211 (2) XAResource 1291479: committing xid = < 131075, 26, 24, 1-a09c8d8:d10e:4b8e3e06:32a09c8d8:d10e:4b8e3e06:34 > (one phase)
> >>> 2010-03-03 12:47:57,217 INFO [STDOUT] 12:47:57.217 (2) simple execute, handler=org(dot)postgresql(dot)jdbc2(dot)AbstractJdbc2Connection$TransactionCommandHandler(at)1a9b034, maxRows=0, fetchSize=0, flags=22
> >>> 2010-03-03 12:47:57,225 INFO [STDOUT] 12:47:57.225 (2) FE=> Parse(stmt=S_2,query="COMMIT",oids={})
> >>> 2010-03-03 12:47:57,227 INFO [STDOUT] 12:47:57.227 (2) FE=> Bind(stmt=S_2,portal=null)
> >>> 2010-03-03 12:47:57,229 INFO [STDOUT] 12:47:57.228 (2) FE=> Execute(portal=null,limit=1)
> >>> 2010-03-03 12:47:57,237 INFO [STDOUT] 12:47:57.237 (2) FE=> Sync
> >>> 2010-03-03 12:47:57,246 INFO [STDOUT] 12:47:57.246 (2) <=BE ParseComplete [S_2]
> >>> 2010-03-03 12:47:57,248 INFO [STDOUT] 12:47:57.248 (2) <=BE BindComplete [null]
> >>> 2010-03-03 12:47:57,250 INFO [STDOUT] 12:47:57.250 (2) <=BE CommandStatus(COMMIT)
> >>> 2010-03-03 12:47:57,251 INFO [STDOUT] 12:47:57.251 (2) <=BE ReadyForQuery(I)
> >>>
> >>>
> >>> call to the java block - the one with con.setAutocommit(false) - (as we see below its fine the very first time)
> >>> =================================================================
> >>> 2010-03-03 12:49:31,892 INFO [STDOUT] 12:49:31.892 (2) simple execute, handler=org(dot)postgresql(dot)jdbc2(dot)AbstractJdbc2Statement$StatementResultHandler(at)19331eb, maxRows=0, fetchSize=0, flags=1
> >>> 2010-03-03 12:49:31,893 INFO [STDOUT] 12:49:31.893 (2) FE=> Bind(stmt=S_1,portal=null)
> >>> 2010-03-03 12:49:31,895 INFO [STDOUT] 12:49:31.895 (2) FE=> Execute(portal=null,limit=0)
> >>> 2010-03-03 12:49:31,896 INFO [STDOUT] 12:49:31.895 (2) FE=> Parse(stmt=null,query="select now()",oids={})
> >>> 2010-03-03 12:49:31,897 INFO [STDOUT] 12:49:31.897 (2) FE=> Bind(stmt=null,portal=null)
> >>> 2010-03-03 12:49:31,898 INFO [STDOUT] 12:49:31.898 (2) FE=> Describe(portal=null)
> >>> 2010-03-03 12:49:31,899 INFO [STDOUT] 12:49:31.899 (2) FE=> Execute(portal=null,limit=0)
> >>> 2010-03-03 12:49:31,901 INFO [STDOUT] 12:49:31.901 (2) FE=> Sync
> >>> 2010-03-03 12:49:31,903 INFO [STDOUT] 12:49:31.902 (2) <=BE BindComplete [null]
> >>> 2010-03-03 12:49:31,904 INFO [STDOUT] 12:49:31.904 (2) <=BE CommandStatus(BEGIN)
> >>> 2010-03-03 12:49:31,904 INFO [STDOUT] 12:49:31.904 (2) <=BE ParseComplete [null]
> >>> 2010-03-03 12:49:31,905 INFO [STDOUT] 12:49:31.905 (2) <=BE BindComplete [null]
> >>> 2010-03-03 12:49:31,905 INFO [STDOUT] 12:49:31.905 (2) <=BE RowDescription(1)
> >>> 2010-03-03 12:49:31,906 INFO [STDOUT] 12:49:31.906 (2) <=BE DataRow
> >>> 2010-03-03 12:49:31,907 INFO [STDOUT] 12:49:31.907 (2) <=BE CommandStatus(SELECT)
> >>> 2010-03-03 12:49:31,908 INFO [STDOUT] 12:49:31.908 (2) <=BE ReadyForQuery(T)
> >>> 2010-03-03 12:49:31,909 INFO [STDOUT] 12:49:31.909 (2) simple execute, handler=org(dot)postgresql(dot)jdbc2(dot)AbstractJdbc2Connection$TransactionCommandHandler(at)1d7ce63, maxRows=0, fetchSize=0, flags=22
> >>> 2010-03-03 12:49:31,910 INFO [STDOUT] 12:49:31.910 (2) FE=> Bind(stmt=S_2,portal=null)
> >>> 2010-03-03 12:49:31,911 INFO [STDOUT] 12:49:31.911 (2) FE=> Execute(portal=null,limit=1)
> >>> 2010-03-03 12:49:31,913 INFO [STDOUT] 12:49:31.912 (2) FE=> Sync
> >>> 2010-03-03 12:49:31,915 INFO [STDOUT] 12:49:31.915 (2) <=BE BindComplete [null]
> >>> 2010-03-03 12:49:31,916 INFO [STDOUT] 12:49:31.916 (2) <=BE CommandStatus(COMMIT)
> >>> 2010-03-03 12:49:31,917 INFO [STDOUT] 12:49:31.917 (2) <=BE ReadyForQuery(I)
> >>>
> >>> call to the ejb (again - 2nd time)
> >>> ====================
> >>> 2010-03-03 12:50:24,246 INFO [STDOUT] 12:50:24.245 (2) XAResource 1291479: starting transaction xid = < 131075, 26, 24, 1-a09c8d8:d10e:4b8e3e06:3ca09c8d8:d10e:4b8e3e06:3e >
> >>> 2010-03-03 12:50:24,248 INFO [STDOUT] 12:50:24.247 (2) simple execute, handler=org(dot)postgresql(dot)jdbc2(dot)AbstractJdbc2Statement$StatementResultHandler(at)a06e8d, maxRows=0, fetchSize=0, flags=1
> >>> 2010-03-03 12:50:24,248 INFO [STDOUT] 12:50:24.248 (2) FE=> Bind(stmt=S_1,portal=null)
> >>> 2010-03-03 12:50:24,249 INFO [STDOUT] 12:50:24.249 (2) FE=> Execute(portal=null,limit=0)
> >>> 2010-03-03 12:50:24,249 INFO [STDOUT] 12:50:24.249 (2) FE=> Parse(stmt=null,query="select apptblidval,colname from status where assettable=$1 and assetidval=$2 and appname=$3 and apptblname=$4 and status=$5 and isvalid order by apptblidval",oids={1043,23,1043,1043,1043})
> >>> 2010-03-03 12:50:24,250 INFO [STDOUT] 12:50:24.250 (2) FE=> Bind(stmt=null,portal=null,$1=<'mariner'>,$2=<'14173'>,$3=<'Crew'>,$4=<'marinercourses'>,$5=<'warn'>)
> >>> 2010-03-03 12:50:24,251 INFO [STDOUT] 12:50:24.251 (2) FE=> Describe(portal=null)
> >>> 2010-03-03 12:50:24,252 INFO [STDOUT] 12:50:24.252 (2) FE=> Execute(portal=null,limit=0)
> >>> 2010-03-03 12:50:24,253 INFO [STDOUT] 12:50:24.252 (2) FE=> Sync
> >>> 2010-03-03 12:50:24,255 INFO [STDOUT] 12:50:24.255 (2) <=BE BindComplete [null]
> >>> 2010-03-03 12:50:24,256 INFO [STDOUT] 12:50:24.256 (2) <=BE CommandStatus(BEGIN)
> >>> 2010-03-03 12:50:24,257 INFO [STDOUT] 12:50:24.257 (2) <=BE ParseComplete [null]
> >>> 2010-03-03 12:50:24,258 INFO [STDOUT] 12:50:24.258 (2) <=BE BindComplete [null]
> >>> 2010-03-03 12:50:24,260 INFO [STDOUT] 12:50:24.260 (2) <=BE RowDescription(2)
> >>> 2010-03-03 12:50:24,261 INFO [STDOUT] 12:50:24.261 (2) <=BE CommandStatus(SELECT)
> >>> 2010-03-03 12:50:24,262 INFO [STDOUT] 12:50:24.262 (2) <=BE ReadyForQuery(T)
> >>> 2010-03-03 12:50:24,263 INFO [STDOUT] 12:50:24.262 (2) XAResource 1291479: ending transaction xid = < 131075, 26, 24, 1-a09c8d8:d10e:4b8e3e06:3ca09c8d8:d10e:4b8e3e06:3e >
> >>> 2010-03-03 12:50:24,264 INFO [STDOUT] 12:50:24.263 (2) XAResource 1291479: committing xid = < 131075, 26, 24, 1-a09c8d8:d10e:4b8e3e06:3ca09c8d8:d10e:4b8e3e06:3e > (one phase)
> >>> 2010-03-03 12:50:24,265 INFO [STDOUT] 12:50:24.265 (2) simple execute, handler=org(dot)postgresql(dot)jdbc2(dot)AbstractJdbc2Connection$TransactionCommandHandler(at)1217fef, maxRows=0, fetchSize=0, flags=22
> >>> 2010-03-03 12:50:24,266 INFO [STDOUT] 12:50:24.266 (2) FE=> Bind(stmt=S_2,portal=null)
> >>> 2010-03-03 12:50:24,267 INFO [STDOUT] 12:50:24.267 (2) FE=> Execute(portal=null,limit=1)
> >>> 2010-03-03 12:50:24,269 INFO [STDOUT] 12:50:24.269 (2) FE=> Sync
> >>> 2010-03-03 12:50:24,272 INFO [STDOUT] 12:50:24.272 (2) <=BE BindComplete [null]
> >>> 2010-03-03 12:50:24,273 INFO [STDOUT] 12:50:24.273 (2) <=BE CommandStatus(COMMIT)
> >>> 2010-03-03 12:50:24,274 INFO [STDOUT] 12:50:24.274 (2) <=BE ReadyForQuery(I)
> >>>
> >>> call to the java block - the one with con.setAutocommit(false) - again - 2nd time - this time we have a problem
> >>> =================================================================
> >>> 2010-03-03 12:51:30,426 INFO [STDOUT] 12:51:30.426 (2) simple execute, handler=org(dot)postgresql(dot)jdbc2(dot)AbstractJdbc2Statement$StatementResultHandler(at)13b64eb, maxRows=0, fetchSize=0, flags=17
> >>> 2010-03-03 12:51:30,427 INFO [STDOUT] 12:51:30.427 (2) FE=> Parse(stmt=null,query="select now()",oids={})
> >>> 2010-03-03 12:51:30,428 INFO [STDOUT] 12:51:30.428 (2) FE=> Bind(stmt=null,portal=null)
> >>> 2010-03-03 12:51:30,429 INFO [STDOUT] 12:51:30.429 (2) FE=> Describe(portal=null)
> >>> 2010-03-03 12:51:30,429 INFO [STDOUT] 12:51:30.429 (2) FE=> Execute(portal=null,limit=0)
> >>> 2010-03-03 12:51:30,430 INFO [STDOUT] 12:51:30.430 (2) FE=> Sync
> >>> 2010-03-03 12:51:30,433 INFO [STDOUT] 12:51:30.433 (2) <=BE ParseComplete [null]
> >>> 2010-03-03 12:51:30,434 INFO [STDOUT] 12:51:30.434 (2) <=BE BindComplete [null]
> >>> 2010-03-03 12:51:30,435 INFO [STDOUT] 12:51:30.435 (2) <=BE RowDescription(1)
> >>> 2010-03-03 12:51:30,436 INFO [STDOUT] 12:51:30.436 (2) <=BE DataRow
> >>> 2010-03-03 12:51:30,437 INFO [STDOUT] 12:51:30.437 (2) <=BE CommandStatus(SELECT)
> >>> 2010-03-03 12:51:30,440 INFO [STDOUT] 12:51:30.440 (2) <=BE ReadyForQuery(I)
> >>>
> >>> call to a java block with con.setAutocommit(true)
> >>> ==============================
> >>> 2010-03-03 12:55:42,028 INFO [STDOUT] 12:55:42.028 (2) simple execute, handler=org(dot)postgresql(dot)jdbc2(dot)AbstractJdbc2Statement$StatementResultHandler(at)18526aa, maxRows=0, fetchSize=0, flags=17
> >>> 2010-03-03 12:55:42,029 INFO [STDOUT] 12:55:42.028 (2) FE=> Parse(stmt=null,query="select now()",oids={})
> >>> 2010-03-03 12:55:42,029 INFO [STDOUT] 12:55:42.029 (2) FE=> Bind(stmt=null,portal=null)
> >>> 2010-03-03 12:55:42,030 INFO [STDOUT] 12:55:42.030 (2) FE=> Describe(portal=null)
> >>> 2010-03-03 12:55:42,030 INFO [STDOUT] 12:55:42.030 (2) FE=> Execute(portal=null,limit=0)
> >>> 2010-03-03 12:55:42,030 INFO [STDOUT] 12:55:42.030 (2) FE=> Sync
> >>> 2010-03-03 12:55:42,032 INFO [STDOUT] 12:55:42.032 (2) <=BE ParseComplete [null]
> >>> 2010-03-03 12:55:42,033 INFO [STDOUT] 12:55:42.033 (2) <=BE BindComplete [null]
> >>> 2010-03-03 12:55:42,034 INFO [STDOUT] 12:55:42.034 (2) <=BE RowDescription(1)
> >>> 2010-03-03 12:55:42,035 INFO [STDOUT] 12:55:42.035 (2) <=BE DataRow
> >>> 2010-03-03 12:55:42,036 INFO [STDOUT] 12:55:42.035 (2) <=BE CommandStatus(SELECT)
> >>> 2010-03-03 12:55:42,036 INFO [STDOUT] 12:55:42.036 (2) <=BE ReadyForQuery(I)
> >>>
> >>> call to the java block - the one with con.setAutocommit(false) - again - 3rd time - this time its ok again
> >>> ==============================================================
> >>> 2010-03-03 12:56:51,374 INFO [STDOUT] 12:56:51.374 (2) simple execute, handler=org(dot)postgresql(dot)jdbc2(dot)AbstractJdbc2Statement$StatementResultHandler(at)14a5594, maxRows=0, fetchSize=0, flags=1
> >>> 2010-03-03 12:56:51,378 INFO [STDOUT] 12:56:51.378 (2) FE=> Bind(stmt=S_1,portal=null)
> >>> 2010-03-03 12:56:51,380 INFO [STDOUT] 12:56:51.380 (2) FE=> Execute(portal=null,limit=0)
> >>> 2010-03-03 12:56:51,385 INFO [STDOUT] 12:56:51.385 (2) FE=> Parse(stmt=null,query="select now()",oids={})
> >>> 2010-03-03 12:56:51,387 INFO [STDOUT] 12:56:51.387 (2) FE=> Bind(stmt=null,portal=null)
> >>> 2010-03-03 12:56:51,388 INFO [STDOUT] 12:56:51.388 (2) FE=> Describe(portal=null)
> >>> 2010-03-03 12:56:51,390 INFO [STDOUT] 12:56:51.390 (2) FE=> Execute(portal=null,limit=0)
> >>> 2010-03-03 12:56:51,391 INFO [STDOUT] 12:56:51.391 (2) FE=> Sync
> >>> 2010-03-03 12:56:51,393 INFO [STDOUT] 12:56:51.393 (2) <=BE BindComplete [null]
> >>> 2010-03-03 12:56:51,395 INFO [STDOUT] 12:56:51.395 (2) <=BE CommandStatus(BEGIN)
> >>> 2010-03-03 12:56:51,397 INFO [STDOUT] 12:56:51.397 (2) <=BE ParseComplete [null]
> >>> 2010-03-03 12:56:51,398 INFO [STDOUT] 12:56:51.398 (2) <=BE BindComplete [null]
> >>> 2010-03-03 12:56:51,399 INFO [STDOUT] 12:56:51.399 (2) <=BE RowDescription(1)
> >>> 2010-03-03 12:56:51,400 INFO [STDOUT] 12:56:51.400 (2) <=BE DataRow
> >>> 2010-03-03 12:56:51,402 INFO [STDOUT] 12:56:51.402 (2) <=BE CommandStatus(SELECT)
> >>> 2010-03-03 12:56:51,404 INFO [STDOUT] 12:56:51.404 (2) <=BE ReadyForQuery(T)
> >>> 2010-03-03 12:56:51,406 INFO [STDOUT] 12:56:51.406 (2) simple execute, handler=org(dot)postgresql(dot)jdbc2(dot)AbstractJdbc2Connection$TransactionCommandHandler(at)13d3f62, maxRows=0, fetchSize=0, flags=22
> >>> 2010-03-03 12:56:51,409 INFO [STDOUT] 12:56:51.409 (2) FE=> Bind(stmt=S_2,portal=null)
> >>> 2010-03-03 12:56:51,411 INFO [STDOUT] 12:56:51.411 (2) FE=> Execute(portal=null,limit=1)
> >>> 2010-03-03 12:56:51,413 INFO [STDOUT] 12:56:51.413 (2) FE=> Sync
> >>> 2010-03-03 12:56:51,417 INFO [STDOUT] 12:56:51.417 (2) <=BE BindComplete [null]
> >>> 2010-03-03 12:56:51,419 INFO [STDOUT] 12:56:51.418 (2) <=BE CommandStatus(COMMIT)
> >>> 2010-03-03 12:56:51,421 INFO [STDOUT] 12:56:51.421 (2) <=BE ReadyForQuery(I)
> >>>
> >>> Στις Wednesday 03 March 2010 12:30:37 ο/η Heikki Linnakangas έγραψε:
> >>>> Achilleas Mantzios wrote:
> >>>>> Στις Wednesday 03 March 2010 10:54:53 ο/η Heikki Linnakangas έγραψε:
> >>>>>> Achilleas Mantzios wrote:
> >>>>>>> i'll try to make a test case, but i think now there is enuf material for anyone to make his own case,
> >>>>>>> please ask whatever i may have missed, and thank you for your attention.
> >>>>>> If you can set logLevel to DEBUG (ie. loglevel=2 in connection string),
> >>>>>> run the code, and send over the logs, that would help a lot. From that
> >>>>>> we should see what exactly is the sequence of XA commands the JDBC
> >>>>>> driver is receiving from JBoss.
> >>>>> As loglevel configuration property to org.postgresql.ds.common.BaseDataSource is not supported in the lastest driver,
> >>>>> i made this patch (i attach it) against postgresql-jdbc-8.4-701.src, also i set in jboss
> >>>>>
> >>>>> <datasources>
> >>>>> <xa-datasource>
> >>>>> <jndi-name>pgsql</jndi-name>
> >>>>> <use-java-context>true</use-java-context>
> >>>>> <xa-datasource-class>org.postgresql.xa.PGXADataSource</xa-datasource-class>
> >>>>> <xa-datasource-property name="ServerName">localhost</xa-datasource-property>
> >>>>> <xa-datasource-property name="PortNumber">5432</xa-datasource-property>
> >>>>> <xa-datasource-property name="DatabaseName">dynacom</xa-datasource-property>
> >>>>> <xa-datasource-property name="User">postgres</xa-datasource-property>
> >>>>> <xa-datasource-property name="Password">xxxx</xa-datasource-property>
> >>>>> <xa-datasource-property name="Compatible">8.2</xa-datasource-property>
> >>>>> <xa-datasource-property name="Loglevel">2</xa-datasource-property>
> >>>>> <track-connection-by-tx/>
> >>>>> <min-pool-size>1</min-pool-size>
> >>>>> <max-pool-size>2</max-pool-size>
> >>>>> <metadata>
> >>>>> <type-mapping>PostgreSQL 8.0</type-mapping>
> >>>>> </metadata>
> >>>>> </xa-datasource>
> >>>>> </datasources>
> >>>>>
> >>>>> But i dont see anything spectacular comming out of PostgreSQL logs.
> >>>>> in postgresql.conf I have set
> >>>>> client_min_messages = debug5
> >>>>> log_min_messages = debug5
> >>>> The extra logs should go somewhere in the client side, in one of the
> >>>> jboss log files. If you can't find it, you can do something like this in
> >>>> the application to redirect it to a file:
> >>>>
> >>>> java.io.Writer output = new
> >>>> java.io.FileWriter("/tmp/postgresql-jdbc.debug.txt", true);
> >>>> java.sql.DriverManager.setLogWriter(new
> >>>> java.io.PrintWriter(output,true));
> >>>>
> >>>>
> >>>>> however playing with <xa-datasource-property name="Loglevel"></xa-datasource-property> does not seem to change a thing.
> >>>>> Am i missing something?
> >>>> Not sure why that's not working, but here's one way of setting loglevel:
> >>>>
> >>>> 1. Create file "org/postgresql/driverconfig.properties" with line
> >>>> "loglevel=2" in it:
> >>>> echo "loglevel=2" > org/postgresql/driverconfig.properties
> >>>> 2. Add file to the driver jar:
> >>>> jar uvf postgresql.jar org/postgresql/driverconfig.properties
> >>>>
> >>>> --
> >>>> Heikki Linnakangas
> >>>> EnterpriseDB http://www.enterprisedb.com
> >>>>
> >>>
> >>>
> >>
> >
> >
> >
>
>

--
Achilleas Mantzios