Getting Error:closing a connection for you. Please help

Question

Hello All,
I'm using jboss3.2.6. I used ejb2.1 (session bean and entity bean[BMP]). I did few data base transations in cmp and few in simple data source connection.
I'm getting below errors occasionally
'No managed connection exception
java.lang.OutOfMemoryError: Java heap space
[CachedConnectionManager] Closing a connection for you. Plea
se close them yourself: org.jboss.resource.adapter.jdbc.WrappedConnection@11ed0d
5
I've given below my dao connection code here,
package com.drtrack.util;
import java.sql.Connection;
import java.sql.SQLException;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;
public class DAOUtil {
private static DataSource _ds;
public Connection con;
public DAOUtil() throws SQLException {
try {
if (_ds == null)
assemble();
if(_ds != null && con == null) {
con = _ds.getConnection();
}catch(SQLException ex) {
ex.printStackTrace();
private void assemble() {
Context ic = null;
try {
ic = new InitialContext();
DrTrackUtil drutil = new DrTrackUtil();
_ds = (DataSource) ic.lookup("java:/" + drutil.getText("SOURCE_DIR"));
drutil = null;
}catch (Exception e) {
e.printStackTrace();
}finally {
try {
ic.close();
}catch(NamingException ne) {}
public void closeConnection() throws SQLException {
if(con != null)
con.close();
con = null;
}below is the code with get connection and doing transaction in it.
public static AccountMasterValueBean getAccountMasterByAcctId(String acctId) {
AccountMasterValueBean bean = null;
DAOUtil dao = null;
CallableStatement cst = null;
ResultSet rs = null;
try {
dao = new DAOUtil();
cst = dao.con.prepareCall(DrTrackConstants.MSSQL_USP_ACCOUNTMASTER_BY_ACCTID);
cst.setObject(1, acctId);
rs = cst.executeQuery();
if(rs != null && rs.next()) {
bean = new AccountMasterValueBean(
Integer.valueOf(rs.getString("accountkeyid")),
rs.getString("latitude"),
rs.getString("longitude"));
}catch(SQLException se) {
logger.info("SQL Error: " + se);
finally {
if(rs != null){
try {
rs.close();
}catch(SQLException se) {
logger.info("SQL Error: " + se);
finally {
rs = null;
if(cst != null) {
try{
cst.close();
}catch(SQLException se) {
logger.info("SQL Error: " + se);
finally {
cst = null;
if(dao != null) {
try {
dao.closeConnection();
}catch(SQLException se) {
logger.info("SQL Error: " + se);
finally {
dao = null;
return bean;
}I closed connections, resultsets and statements properly.
Why I'm getting these errors.? Where I'm doing wrong. ? Please help me. I have to fix them ASAP.
Thanks.

Answer 1

Hello All,
I'm using jboss3.2.6. I used ejb2.1 (session bean and entity bean[BMP]). I did few data base transations in cmp and few in simple data source connection.
I'm getting below errors occasionally
'No managed connection exception
java.lang.OutOfMemoryError: Java heap space
[CachedConnectionManager] Closing a connection for you. Plea
se close them yourself: org.jboss.resource.adapter.jdbc.WrappedConnection@11ed0d
5
I've given below my dao connection code here,
package com.drtrack.util;
import java.sql.Connection;
import java.sql.SQLException;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;
public class DAOUtil {
private static DataSource _ds;
public Connection con;
public DAOUtil() throws SQLException {
try {
if (_ds == null)
assemble();
if(_ds != null && con == null) {
con = _ds.getConnection();
}catch(SQLException ex) {
ex.printStackTrace();
private void assemble() {
Context ic = null;
try {
ic = new InitialContext();
DrTrackUtil drutil = new DrTrackUtil();
_ds = (DataSource) ic.lookup("java:/" + drutil.getText("SOURCE_DIR"));
drutil = null;
}catch (Exception e) {
e.printStackTrace();
}finally {
try {
ic.close();
}catch(NamingException ne) {}
public void closeConnection() throws SQLException {
if(con != null)
con.close();
con = null;
}below is the code with get connection and doing transaction in it.
public static AccountMasterValueBean getAccountMasterByAcctId(String acctId) {
AccountMasterValueBean bean = null;
DAOUtil dao = null;
CallableStatement cst = null;
ResultSet rs = null;
try {
dao = new DAOUtil();
cst = dao.con.prepareCall(DrTrackConstants.MSSQL_USP_ACCOUNTMASTER_BY_ACCTID);
cst.setObject(1, acctId);
rs = cst.executeQuery();
if(rs != null && rs.next()) {
bean = new AccountMasterValueBean(
Integer.valueOf(rs.getString("accountkeyid")),
rs.getString("latitude"),
rs.getString("longitude"));
}catch(SQLException se) {
logger.info("SQL Error: " + se);
finally {
if(rs != null){
try {
rs.close();
}catch(SQLException se) {
logger.info("SQL Error: " + se);
finally {
rs = null;
if(cst != null) {
try{
cst.close();
}catch(SQLException se) {
logger.info("SQL Error: " + se);
finally {
cst = null;
if(dao != null) {
try {
dao.closeConnection();
}catch(SQLException se) {
logger.info("SQL Error: " + se);
finally {
dao = null;
return bean;
}I closed connections, resultsets and statements properly.
Why I'm getting these errors.? Where I'm doing wrong. ? Please help me. I have to fix them ASAP.
Thanks.