Re: XA rollback problem - Mailing list pgsql-jdbc

Hi,

Thanks for the quick response.

I did not leave anything out of the driver logging, that's why I think
there is something wrong in the driver, there is no S_2 parse.

I do not know what the driver is issuing but it results in no record
being inserted. Now the code:

try {
  UserTransaction userTransaction = (UserTransaction)new
InitialContext().lookup("java:comp/UserTransaction");
  DataSource datasrc = (DataSource)new
InitialContext().lookup("java:comp/env/jdbc/default");
  userTransaction.begin();
  try {
    Connection conn = datasrc.getConnection();
    Statement stmt = conn.createStatement();
    stmt.executeUpdate("INSERT INTO test (test_id) VALUES (0)");
    stmt.close();
    conn.close();
    userTransaction.commit();
  } catch (Exception e) {
    userTransaction.rollback();
    throw e;
  }
} catch (Exception e) {
  e.printStackTrace();
}

The problem occurs when calling conn.close(), if you move the close()
after the commit() it works just fine. I think the connection gets
invalidated while it should stay active because it still has to commit
or rollback (whatever the transactionmanager requests).

See below for the driver loggings.

I hope you can help me solve this.

Niels

Results of the code with conn.close() *before* userTransaction.commit():

XAResource 13d21d6: starting transaction xid =
SimpleXidImpl[format=1c131d0a,gtrid={txmgrId=TM1,txmgrBirthTime=11456916
08045,myBirthTime=1145691634374,id=13}, bqual={1}]
simple execute,
handler=org.postgresql.jdbc2.AbstractJdbc2Statement$StatementResultHandl
er@1fa157c, maxRows=0, fetchSize=0, flags=5
 FE=> Bind(stmt=S_1,portal=null)
 FE=> Execute(portal=null,limit=0)
 FE=> Parse(stmt=null,query="INSERT INTO test (test_id) VALUES
(0)",oids={})
 FE=> Bind(stmt=null,portal=null)
 FE=> Describe(portal=null)
 FE=> Execute(portal=null,limit=1)
 FE=> Sync
 <=BE BindComplete [null]
 <=BE CommandStatus(BEGIN)
 <=BE ParseComplete [null]
 <=BE BindComplete [null]
 <=BE NoData
 <=BE CommandStatus(INSERT 0 1)
 <=BE ReadyForQuery(T)
simple execute,
handler=org.postgresql.jdbc2.AbstractJdbc2Connection$TransactionCommandH
andler@1988d36, maxRows=0, fetchSize=0, flags=22
 FE=> Bind(stmt=S_2,portal=null)
 FE=> Execute(portal=null,limit=1)
 FE=> Sync
 <=BE BindComplete [null]
 <=BE CommandStatus(ROLLBACK)
 <=BE ReadyForQuery(I)
XAResource 13d21d6: ending transaction xid =
SimpleXidImpl[format=1c131d0a,gtrid={txmgrId=TM1,txmgrBirthTime=11456916
08045,myBirthTime=1145691634374,id=13}, bqual={1}]
XAResource 13d21d6: committing xid =
SimpleXidImpl[format=1c131d0a,gtrid={txmgrId=TM1,txmgrBirthTime=11456916
08045,myBirthTime=1145691634374,id=13}, bqual={1}] (one phase)

Results of the code with conn.close() *after* userTransaction.commit():

XAResource 13d21d6: starting transaction xid =
SimpleXidImpl[format=1c131d0a,gtrid={txmgrId=TM1,txmgrBirthTime=11456924
08570,myBirthTime=1145692431844,id=13}, bqual={1}]
simple execute,
handler=org.postgresql.jdbc2.AbstractJdbc2Statement$StatementResultHandl
er@1fa157c, maxRows=0, fetchSize=0, flags=5
 FE=> Bind(stmt=S_1,portal=null)
 FE=> Execute(portal=null,limit=0)
 FE=> Parse(stmt=null,query="INSERT INTO test (test_id) VALUES
(0)",oids={})
 FE=> Bind(stmt=null,portal=null)
 FE=> Describe(portal=null)
 FE=> Execute(portal=null,limit=1)
 FE=> Sync
 <=BE BindComplete [null]
 <=BE CommandStatus(BEGIN)
 <=BE ParseComplete [null]
 <=BE BindComplete [null]
 <=BE NoData
 <=BE CommandStatus(INSERT 0 1)
 <=BE ReadyForQuery(T)
XAResource 13d21d6: ending transaction xid =
SimpleXidImpl[format=1c131d0a,gtrid={txmgrId=TM1,txmgrBirthTime=11456924
08570,myBirthTime=1145692431844,id=13}, bqual={1}]
XAResource 13d21d6: committing xid =
SimpleXidImpl[format=1c131d0a,gtrid={txmgrId=TM1,txmgrBirthTime=11456924
08570,myBirthTime=1145692431844,id=13}, bqual={1}] (one phase)
simple execute,
handler=org.postgresql.jdbc2.AbstractJdbc2Connection$TransactionCommandH
andler@1988d36, maxRows=0, fetchSize=0, flags=22
 FE=> Parse(stmt=S_3,query="COMMIT",oids={})
 FE=> Bind(stmt=S_3,portal=null)
 FE=> Execute(portal=null,limit=1)
 FE=> Sync
 <=BE ParseComplete [S_3]
 <=BE BindComplete [null]
 <=BE CommandStatus(COMMIT)
 <=BE ReadyForQuery(I)


-----Original Message-----
From: Kris Jurka [mailto:books@ejurka.com]
Sent: vrijdag 21 april 2006 22:11
To: Niels Beekman
Cc: pgsql-jdbc@postgresql.org
Subject: Re: [JDBC] XA rollback problem



On Fri, 21 Apr 2006, Niels Beekman wrote:

> All inserts or updates I do using PGXADatasource get rolled back
> silently (no exceptions). I reproduced the problem using a simple test
> table with a single int2-column.

Could you show us the java test code you are using as well?

> As you can see in the driver logging it uses one-phase commit. I think
> the problem is in the part that states *CommandStatus(ROLLBACK)*, the
> driver just proceeds to ending and committing the transaction.

The log alone isn't really enough to see what's going on here, because
it
doesn't show the Parse for the S_2 statement.  It is unclear whether the

driver is issuing a commit or a rollback here.

Kris Jurka