Cannot read multiple resultsets from transaction datasource

Question

I get a SQL exception "This object was closed() and cannot be used anymore."
when I try to access the first row of the second result set from a stored procedure.
This occurs when the code is running within an EJB using a transaction-capable
datasource hooked to a connection pool that uses the MSSQLSERVERv7 JDriver
to talk to SQL Server 7.0.
I noted that the resultset class used is weblogic.jdbc20.rmi.SerialResultSet.
The error occurs during the resultSet.next() call even though the resultset is
not null and getUpdateCount() returns -1.
However, the same code works correctly when run in a simple main() procedure from
the DOS command line, connecting directly to the database using only the classes
supplied with the JDriver product. The resultset class used in this case is
weblogic.jdbc.mssqlserver4.TdsResultSet.
The stored procedure is very simple, it just has two lines: SELECT 'Hello' and
SELECT 'World'. The Java code follows.
<PRE>
// ... code to get the connection ...
CallableStatement callableStatement = connection.prepareCall("{CALL spTest}");
callableStatement.execute();
ResultSet resultSet = callableStatement.getResultSet();
if ((resultSet != null) && resultSet.next())
System.out.println("Row from first result set:" + resultSet.getString(1));
callableStatement.getMoreResults();
resultSet = callableStatement.getResultSet();
if ((resultSet != null) && resultSet.next()) // this call to next() throws the
exception
System.out.println("Row from second result set:" + resultSet.getString(1));
resultSet.close();
callableStatement.close();
connection.close();
</PRE>
I am running WL5.10sp11 with mssqlserver4v70sp11 on NT4.0sp6a and JDK1.3.0_02
(HotSpot Client VM).
Regards,
Tom B.

Answer 1

Tom Bechtold wrote:
>
Joe,
Here is the debug messages and trace with your diagnostic jar.
I hope this helps - Tom
we got Hello
java.sql.SQLException: java.lang.Exception: ResultSet originally closed at:
at weblogic.jdbcbase.mssqlserver4.TdsResultSet.close(TdsResultSet.java,
Compiled Code)
at java.lang.Exception.<init>(Unknown Source)
at weblogic.jdbcbase.mssqlserver4.TdsResultSet.close(TdsResultSet.java,
Compiled Code)
at weblogic.jdbcbase.jts.ResultSet.close(ResultSet.java:260)
at weblogic.jdbc20.rmi.internal.ResultSetImpl.close(ResultSetImpl.java:53)
at weblogic.jdbc20.rmi.SerialResultSet.close(SerialResultSet.java:54)
... rest of EJB call stack ...Hi. I do want to see the whole stack trace please, and also the EJB code.
thanks,
Joe
>
Joseph Weinstein <[email protected]> wrote:
Tom Bechtold wrote:
Hi Joe,
I pasted your sample program into my bean and ran it under
WL510sp11 and JDriver 5.1.0sp11, and it did exhibit the error
as my code did.
But it runs fine under WL510sp10 with JDriver 5.1.0sp11.
Thanks for your great support,
TomYou're very welcome. Please take the attached jar file, and add it
at the front of the server's weblogic.classpath, by editting the
startWebLogic script, and let me know what happens. This jar contains
the ResultSet class, with a hack to remember where it was closed, and
print that out if/when it is closed a second time.
Joe
Joseph Weinstein <[email protected]> wrote:
Tom Bechtold wrote:
A follow-on note: when I back out to Service Pack 10, the problem
is
not there,
so it seems that it is an issue with Service Pack 11.
- Tom Bechtold
"Tom Bechtold" <[email protected]> wrote:
I get a SQL exception "This object was closed() and cannot be used
anymore."
when I try to access the first row of the second result set from
a
stored
procedure.
This occurs when the code is running within an EJB using a transaction-capable
datasource hooked to a connection pool that uses the MSSQLSERVERv7JDriver
to talk to SQL Server 7.0.
I noted that the resultset class used is weblogic.jdbc20.rmi.SerialResultSet.
The error occurs during the resultSet.next() call even though theresultset
is not null and getUpdateCount() returns -1.Hi. You say that getUpdateCount() returns -1. I don't see that inthe
code you sent,
so you probably just gave us a representative sample of the code you
run. I did
runs uch code with the driver alone, and it works as you say. I will
see if I can
set up a server to do this via a DataSource, but in case anyone wants
to help/race with
me :-), here's simple code to run. If you convert it to a DataSource
connection,
and it behaves differently, I'll send you a diagnostic class to seewhat's
up...
Joe
Connection connection = null;
try
Properties properties = new Properties();
properties.put("user", "sa");
properties.put("password", "");
Driver d = (Driver)Class.forName("weblogic.jdbc.mssqlserver4.Driver").newInstance();
connection = d.connect("jdbc:weblogic:mssqlserver4:JOE:1433",
properties);
// or get connection from DataSource...
Statement statement = connection.createStatement();
try {
statement.execute("drop procedure bla");
} catch (Exception e){}
statement.execute("create procedure bla as select 'Hello
' select 'world'");
CallableStatement c = connection.prepareCall("{ call bla()
c.execute();
ResultSet resultset = c.getResultSet();
while(resultset.next())
System.out.println("we got " + resultset.getString(1));
resultset.close();
c.getMoreResults();
resultset = c.getResultSet();
while(resultset.next())
System.out.println("we got " + resultset.getString(1));
resultset.close();
catch(SQLException exception1)
exception1.printStackTrace();
finally
try { connection.close();} catch(Exception ex) {}
However, the same code works correctly when run in a simple main()procedure
from the DOS command line, connecting directly to the database
using
only
the classes supplied with the JDriver product. The resultset classused in this
case
is weblogic.jdbc.mssqlserver4.TdsResultSet.
The stored procedure is very simple, it just has two lines: SELECT
'Hello'
and SELECT 'World'. The Java code follows.
// ... code to get the connection ...
CallableStatement callableStatement = connection.prepareCall("{CALLspTest}");
callableStatement.execute();
ResultSet resultSet = callableStatement.getResultSet();
if ((resultSet != null) && resultSet.next())
System.out.println("Row from first result set:" + resultSet.getString(1));
callableStatement.getMoreResults();
resultSet = callableStatement.getResultSet();
if ((resultSet != null) && resultSet.next()) // this call to next()throws the
exception
System.out.println("Row from second result set:" + resultSet.getString(1));
resultSet.close();
callableStatement.close();
connection.close();
I am running WL5.10sp11 with mssqlserver4v70sp11 on NT4.0sp6a and
JDK1.3.0_02
(HotSpot Client VM).
Regards,
Tom B.--
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DIRECTOR OF PRODUCT PLANS AND STRATEGY San Francisco,
CA
E-SALES BUSINESS DEVELOPMENT REPRESENTATIVE Dallas, TX
SOFTWARE ENGINEER (DBA) Liberty Corner,
NJ
SENIOR WEB DEVELOPER San Jose, CA
SOFTWARE ENGINEER (ALL LEVELS), CARY, NORTH CAROLINA
San Jose, CA
SR. PRODUCT MANAGER Bellevue, WA
SR. WEB DESIGNER San Jose, CA
Channel Marketing Manager - EMEA Region London, GBR
DIRECTOR OF MARKETING STRATEGY, APPLICATION SERVERS San Jose, CA
SENIOR SOFTWARE ENGINEER (PLATFORM) San Jose, CA
E-COMMERCE INTEGRATION ARCHITECT San Jose, CA
QUALITY ASSURANCE ENGINEER Redmond, WA
Services Development Manager (Business Development Manager - Services)
Paris, FRA; Munich, DEU
SENIOR SOFTWARE ENGINEER (PLATFORM) Redmond, WA
E-Marketing Programs Specialist EMEA London, GBR
BUSINESS DEVELOPMENT DIRECTOR - E COMMERCE INTEGRATION San Jose, CA
MANAGER, E-SALES Plano, TX
B.E.A. is now hiring! (12/14/01) If interested send a resume to [email protected]
DIRECTOR OF PRODUCT PLANS AND STRATEGY San Francisco, CA
E-SALES BUSINESS DEVELOPMENT REPRESENTATIVE Dallas, TX
SOFTWARE ENGINEER (DBA) Liberty Corner, NJ
SENIOR WEB DEVELOPER San Jose, CA
SOFTWARE ENGINEER (ALL LEVELS), CARY, NORTH CAROLINA San Jose, CA
SR. PRODUCT MANAGER Bellevue, WA
SR. WEB DESIGNER San Jose, CA
Channel Marketing Manager - EMEA Region London, GBR
DIRECTOR OF MARKETING STRATEGY, APPLICATION SERVERS San Jose, CA
SENIOR SOFTWARE ENGINEER (PLATFORM) San Jose, CA
E-COMMERCE INTEGRATION ARCHITECT San Jose, CA
QUALITY ASSURANCE ENGINEER Redmond, WA
Services Development Manager (Business Development Manager - Services) Paris, FRA; Munich, DEU
SENIOR SOFTWARE ENGINEER (PLATFORM) Redmond, WA
E-Marketing Programs Specialist EMEA London, GBR
BUSINESS DEVELOPMENT DIRECTOR - E COMMERCE INTEGRATION San Jose, CA
MANAGER, E-SALES Plano, TX