MySql connection pooling in Tomcat 4.1

Hi,
Could somebody help me before I go insane ?
I have installed Tomcat 4.1 and MySql and is now trying to follow the example at http://jakarta.apache.org/tomcat/tomcat-4.1-doc/jndi-datasource-examples-howto.html to set up a pooled connection to the database.
When i try to look up the DataSource :
DataSource ds = (DataSource) initCtx.lookup("java:comp/env/jdbc/lonDB");
I get an error :
DbcpDataSourceFactory: driverClassName is required
cheers
/H

Hello,
Even though my problem is different, I just appended to this older posting because I am following the same tutorial for setting up a DB Conn pool with MySql.
The problem that I am having is that Tomcat can't find the DBTest class which I copied and compiled from the tutorial.
Where does one have to place their classes for Tomcat 4.1 to see them? In the older version of Tomcat which we use, all we had to was to place the class directory in the CLASSPATH variable on the server, and Tomcat was able to access the classes. We did the same approach for v4.1 but it does not seem to be working.
Any help is appreciated!
Thanks,
Chris

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MySQL connection pooling (tomcat) problem

Hi all i just started learning servlets and i want to make a program in order to understand database connection pooling in tomcat.My problem is that when i run the servlet i created i get this error :
java.lang.NullPointerException org.DB.TestDB2.doGet(TestDB2.java:105) javax.servlet.http.HttpServlet.service(HttpServlet.java:690) javax.servlet.http.HttpServlet.service(HttpServlet.java:803) org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)
And that from tomcat log from netbeans :
org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create JDBC driver of class '' for connect URL 'null'
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<Context path="/DBTest" docBase="DBTest"         debug="5" reloadable="true" crossContext="true">   <Resource name="jdbc/phonebook_db" auth="Container" type="javax.sql.DataSource"               maxActive="100" maxIdle="30" maxWait="10000"               username="*******" password="********" removeAbandoned="true"               removeAbandonedTimeout="120" driverClassName="com.mysql.jdbc.Driver"               url="jdbc:mysql://localhost:3306/test_phonebook_db?autoReconnect=true"/> </Context>
This is the resource reference i have in my web app web.xml file :
<resource-ref>       <description>DB Connection</description>       <res-ref-name>jdbc/phonebook_db</res-ref-name>       <res-type>javax.sql.DataSource</res-type>       <res-auth>Container</res-auth>   </resource-ref>
And this is my servlet class :
package org.DB; import javax.servlet.*; import javax.servlet.http.*; import java.io.*; import java.sql.*; import javax.naming.*; import javax.sql.*; public class TestDB2 extends HttpServlet { private Connection conn ; private Statement stat ; private ResultSet rs ; private int counter; private Object rsValue; public void init() {     try {             InitialContext ctx = new InitialContext();             DataSource ds = (DataSource)ctx.lookup("java:comp/env/jdbc/phonebook_db");             conn = ds.getConnection();             }         catch(Exception e) {               e.printStackTrace();         }     }     public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {         try {           stat = conn.createStatement();           rs = stat.executeQuery("SELECT * FROM phones_table");            } catch (SQLException sqle) {         sqle.printStackTrace();         }      response.setContentType("text/html; charset=utf-8");     PrintWriter out = response.getWriter();         String docType = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 " + "Transitional//EN\">\n";     out.println(docType +"<HTML>\n" + "<HEAD><TITLE>PhoneBook entries</TITLE></HEAD>\n");         counter = 0;     try {         while (rs.next()) {             out.println("<h4>Entry no. " + (++counter) + "</h4>");             out.println("<table width=\"75%\" border=\"1\">");             out.println("<tr>\n"+ "<td width=\21%\"><b>LastName:</b></td>\n"+ "<td width=\"79%\">");             out.println((((rsValue = rs.getObject("LASTNAME"))==null || rs.wasNull())?                 "":(rsValue.toString())));             out.println("</td>\n</tr>\n" + "<tr>\n"+                     "<td width=\21%\"><b>FirstName:</b></td>\n"+ "<td width=\"79%\">");             out.println((((rsValue = rs.getObject("FIRSTNAME"))==null || rs.wasNull())?                 "":(rsValue.toString())));             out.println("</td>\n"+ "</tr>\n"+                     "<td width=\21%\"><b>Phone:</b></td>\n"+ "<td width=\"79%\">");             out.println((((rsValue = rs.getObject("PHONE"))==null || rs.wasNull())?                 "":(rsValue.toString())));             out.println("</td>\n" + "</tr>\n" +                     "</table>\n"+ "<br>\n<br>");         }     } catch (SQLException sqle) {         sqle.printStackTrace();     }     out.println("</body>\n"+             "</html>"); } public void destroy() {     try {         rs.close();         stat.close();         conn.close();     } catch (SQLException sqle) {         sqle.printStackTrace();         }     } }{code} Any suggestions?

Thank you for your answer.Yes my servlet class is something more worse than horrible(i don't use the database connection correct i don't use the MVC pattern i use out.println() ) but i just tried to take a ready example and try to understand .So i write this servlet myself as a starting point :
package org.DB;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.sql.*;
public class DBServlet extends HttpServlet {
    private Connection conn ;
    private Statement stat ;
    private ResultSet rs ;
    private int counter;
    String driver = "com.mysql.jdbc.Driver";
    String dbURL = "jdbc:mysql://localhost:3306/phonebookdb?user=**********&password=************";
    @Override
public void init() {
     try {
            Class.forName(driver).newInstance();
            conn = DriverManager.getConnection(dbURL);
     }catch(Exception e) {
              e.printStackTrace();
              System.err.print("Unable to make connection ");
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet DBServlet</title>");
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet DBServlet at " + request.getContextPath () + "</h1>");
            out.println("<br /><br /><br />");
            if(conn!=null)
                out.println("conn object : "+conn);
            out.println("</body>");
            out.println("</html>");
        } catch(Exception sq) {
            System.out.println("Exception" + sq.getMessage());
            out.close();
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
     public void destroy() {
     try {
         conn.close();
     } catch (SQLException sqle) {
         sqle.printStackTrace();
    @Override
    public String getServletInfo() {
        return "A Simple Servlet";
}And it work for now.
Edited by: pavlos555 on Oct 21, 2008 10:21 AM

How to create Connection pool in Tomcat 5

present i am developing one web site in that i am using tomcat 5.
i am trying to establish connection pooling in tomcat,i am facing some problems..
tomcat throws the following exception ie.,
cannot create JDBC Driver class for connect URL null.
my code lik this
i configured the web.xml
<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app>
<resource-ref>
<description>Oracle Datasource example</description>
<res-ref-name>sqlserver</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
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</resource-ref>
</web-app>
my server.xml
<?xml version='1.0' encoding='utf-8'?>
<Server>
<Listener className="org.apache.catalina.mbeans.ServerLifecycleListener"/>
<Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener"/>
<GlobalNamingResources>
<Environment name="simpleValue" type="java.lang.Integer" value="30"/>
<Resource auth="Container" description="User database that can be updated and saved" name="UserDatabase" type="org.apache.catalina.UserDatabase"/>
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<ResourceParams name="UserDatabase">
<parameter>
<name>factory</name>
<value>org.apache.catalina.users.MemoryUserDatabaseFactory</value>
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<parameter>
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<value>sudha</value>
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<parameter>
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<value>conf/tomcat-users.xml</value>
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<parameter>
<name>username</name>
<value>sudha</value>
</parameter>
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<ResourceParams name="sqlserver">
<parameter>
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<value>jdbc:odbc:SQL</value>
</parameter>
<parameter>
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<value>select * from employee</value>
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<value>4</value>
</parameter>
<parameter>
<name>maxActive</name>
<value>8</value>
</parameter>
<parameter>
<name>driverClassName</name>
<value>sun.jdbc.odbc.JdbcOdbcDriver</value>
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<parameter>
<name>maxWait</name>
<value>5000</value>
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<value>kpi</value>
</parameter>
<parameter>
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<value>org.apache.naming.factory.DbcpDataSourceFactory</value>
</parameter>
<parameter>
<name>password</name>
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</parameter>
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<Host appBase="webapps" name="localhost">
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<Logger className="org.apache.catalina.logger.FileLogger" prefix="catalina_log." suffix=".txt" timestamp="true"/>
<Realm className="org.apache.catalina.realm.UserDatabaseRealm"/>
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and i studied the the tomcat documentation in that tomcat mentioned
The configuration properties for Tomcat's standard data source resource factory (org.apache.naming.factory.DbcpDataSourceFactory) are as follows:
driverClassName - Fully qualified Java class name of the JDBC driver to be used.
maxActive - The maximum number of active instances that can be allocated from this pool at the same time.
maxIdle - The maximum number of connections that can sit idle in this pool at the same time.
maxWait - The maximum number of milliseconds that the pool will wait (when there are no available connections) for a connection to be returned before throwing an exception.
password - Database password to be passed to our JDBC driver.
url - Connection URL to be passed to our JDBC driver. (For backwards compatibility, the property driverName is also recognized.)
user - Database username to be passed to our JDBC driver.
validationQuery - SQL query that can be used by the pool to validate connections before they are returned to the application. If specified, this query MUST be an SQL SELECT statement that returns at least one row.
how to configure server.xml file
and how to get the org.apache.naming.factory.DbcpDataSourceFactory
please help me...this module is very very urgen to me..

I spent many hours when i first implemented connection pooling trying to put it together. The information is scattered and the config has changed slightly from 5.0 to 5.5 etc. This is how I got it working in 5.5.17:
* server.xml seems to be a wrong place for the pool configuration if you consider it to be an application specific thing. It might be a better idea to put it into C:\tomcat55\conf\Catalina\localhost\ConfigFileForYourWeapp.xml as follows:
<Context path="/ClientLink" docBase="C:\eclipseWorkspace\PortfolioUI3\WebRoot">
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                     type="javax.sql.DataSource"
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<resource-ref>
                <description>Database pool defined in ClientLink.xml</description>
                <res-ref-name>jdbc/testportfolios</res-ref-name>
                <res-type>javax.sql.DataSource</res-type>
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* Get connections in java as follows:
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                     DataSource ds = (DataSource) initCtx.lookup("java:comp/env/jdbc/testportfolios");
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Message was edited by:
Tomppu

Connection pool + db2 + tomcat 5 migration problem

I succeded in using connection pooling in Tomcat 4.0.x and IBM db2 6.xx and 7.xx.
Now I am trying to use Tomcat 5 (released with netbeans 3.6) and I have some problems.
I migrated the context information from server xml to context xml, but I have a username-password problem
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<Resource auth="Container" name="jdbc/pegaso61" type="javax.sql.DataSource"/>
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<parameter>
<name>driverClassName</name>
<value>COM.ibm.db2.jdbc.app.DB2Driver</value>
</parameter>
<parameter>
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<parameter>
<name>username</name>
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<value>passxxxx</value>
</parameter>
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When running my servlets, i get this error:
Exception in PoolDB2Connector.getConnection():org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory, cause: [IBM][CLI Driver] SQL1403N The username and/or password supplied is incorrect. SQLSTATE=08004
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I have a parallel installation of netbeans 3.5.1 (tomcat 4.0.6) with the same parameters (username, password, url...) and is still perfectly working
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OK, I found the problem !
It is not due to any configuration issue, but it is due to a BUG in tomcat 5.xx
I reproduced the problem with mysql db server other than db2 db servver.
The problem is the presence of the $ sign in the users' s password !!!!
Probably the xml parser rading server.xml introduce some error finding $ sign.
The problem is still present in the 5.028 version of tomcat.
If i modify user's password REMOVING $ sign, everything is OK
Perhaps $ sign should be escaped (?!?)
Andrea

Database connection Pooling in TOMCAT

I am trying Database connection Pooling in TOMCAT
I am getting the following error
org.apache.commons.dbcp.SQLNestedException: Cannot create JDBC driver of class '' for connect URL 'null'
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<resource-ref>
<res-ref-name>WMSPREF</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
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What version of Tomcat do you have? 4? 5? 5.5?
Have you defined a Resource entry in server.xml as well as the ResourceParams?
I have never had any luck configuring a datasource in the server.xml file.
What HAS worked for me is putting the config into a myWebApp.xml file.
My web context is "myWebApp"
The name of the file is "myWebApp.xml"
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For Tomcat5 this goes in the [TOMCAT_HOME]/conf/Catalina/localhost directory
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evnafets

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and i studied the the tomcat documentation in that tomcat mentioned
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maxIdle - The maximum number of connections that can sit idle in this pool at the same time.
maxWait - The maximum number of milliseconds that the pool will wait (when there are no available connections) for a connection to be returned before throwing an exception.
password - Database password to be passed to our JDBC driver.
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user - Database username to be passed to our JDBC driver.
validationQuery - SQL query that can be used by the pool to validate connections before they are returned to the application. If specified, this query MUST be an SQL SELECT statement that returns at least one row.
how to configure server.xml file
and how to get the org.apache.naming.factory.DbcpDataSourceFactory
please help me...this module is very very urgen to me..

http://jakarta.apache.org/tomcat/tomcat-5.0-doc/jndi-datasource-examples-howto.html

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Oh yeah. I've already tried it. It always seems to
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I have people telling me that having uname/password to
the database in server.xml doesn't augur well for the
security of data in the db :(It could be true, but
1) The only people to see the server.xml are those who work on the server. The server.xml (or better the context.xml if you can avoid editing the server.xml altogether) is not accessable from the web.
2) My strategy was always to create many different levels of access to any particular database. Some with Read Only access and limited table viewability, and then progressively higher access. You give the server.xml only the access they absolutely need. IE, if they are just retrieving data from a couple tables, make a read-only user with the ability to see only those tables...
Don't take my word for it though. I have never really tried to do the whole ultra-secure thing, my apps are not important.

Connection Pooling in Tomcat 4.1.18

Hi,
Can anyone point me to a decent resource on how to implement Oracle connection pooling in Tomcat? I'm using the UltraSearch API's for an application and cannot get it to work correctly with the DBCP implementation that I currently use.
Many thanks,
Mark.

Mark,
What kind of Oracle Connection pooling are your refering to? Are you talking about BC4J connection pooling?

How to configure connection pooling in tomcat?

how to configure connection pooling in tomcat and how to use the connection pooling in the jsp and servlets?

thanks for the reply, i have configured the connection pool settings in the tomcat.
I created a class with static method, which will return the connection object.
whenever i need the connection object, iam invoking the static method, once its usage is over iam closing thew connection..
is it the right way of using the connection object in the web application.

Connection Pooling in Tomcat with SQL Server

Hey Guys,
I have been banging my head against this all day :( so i now turn to you for some help :) I have a web app that uses a database now i want to start using this connection pooling that is supposed to be greatly more efficient than creating a new statement each time i need something from the database.
I have read many articles about this already today and feel that a lot of the contradict each other and one thing that i saw was that there seems to be different way of doing this.
One solution i have tried to implement but have so far failed is as follows:
In Web app:
Update Web.xml to include:
<resource-ref>
        <description>
            Resource reference to a factory for java.sql.Connection
            instances that may be used for talking to a particular
            database that is configured in the server.xml file.
        </description>
        <res-ref-name>
                jdbc/BBL
        </res-ref-name>
        <res-type>
            javax.sql.DataSource
        </res-type>
        <res-auth>
            Container
        </res-auth>
    </resource-ref>Update Context.xml to include:
<Context path="/TEST_CON_POOLING">
<Resource name="jdbc/BBL"
auth="Container"
type="javax.sql.DataSource"
username="sa"
password="sa"
driverClassName="com.microsoft.sqlserver.jdbc.SQLServerDriver"
url="jdbc:microsoft:sqlserver://10.20.1.91:1433;DatabaseName=BBL"
maxActive="8"
maxIdle="4" />
</Context>And then my jsp to test this:
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
--%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>JSP Page</title>
    </head>
    <body>
        <%@ page import="java.sql.ResultSet, java.sql.*,java.sql.SQLException,javax.naming.Context,javax.naming.InitialContext,
        javax.naming.NamingException,javax.sql.DataSource" %>
        <%
        Context initCtx = new InitialContext();
        Context envCtx = (Context) initCtx.lookup("java:comp/env");
        DataSource ds = (DataSource)
        envCtx.lookup("jdbc/BBL");
        Connection conn = ds.getConnection();
        //... use this connection to access the database ...
        Statement stmt = conn.createStatement();
        ResultSet rs = stmt.executeQuery("select id from users");
        while(rs.next()){
            out.write(rs.getString("ID"));
        conn.close();
        %>
    </body>
</html>When i actually deply this i get the following nasty tomcat error:
root cause
org.apache.tomcat.dbcp.dbcp.SQLNestedException:
Cannot create JDBC driver of class 'com.microsoft.sqlserver.jdbc.SQLServerDriver' for connect URL 'jdbc:microsoft:sqlserver://10.20.1.91:1433;DatabaseName=BBL'
     org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1150)
     org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880)
     org.apache.jsp.index_jsp._jspService(index_jsp.java:71)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause
java.sql.SQLException: No suitable driver
     java.sql.DriverManager.getDriver(DriverManager.java:243)
     org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1143)
     org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880)
     org.apache.jsp.index_jsp._jspService(index_jsp.java:71)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)As far as i know all the necessary sql server jar files are in my classpath, and any way i have them all sitting in the CATALINA_HOME/common/lib directory.
Question:
Am i going about this correctly? Some tutorials i have read say that i should be updateing the server.xml file but whenever i go near that tomcat will not even start.
Help greatly appreciated.
If there is anything i have not posted let me know and i will get it up.
Rob

Updating the server.xml file used to be necessary. It is no longer required, and actually not recommended any more.
The best approach I feel is as you have done here, putting the definition into a context.xml file specifically for this application.
In fact it all looks pretty good to me.
JDBC driver jar in [TOMCAT]/common/lib - check
Configuration in context.xml rather than server.xml - check
Using JNDI - check.
Have you got the connection url right?
Is it jdbc:microsoft:sqlserver or just jdbc:sqlserver ? I have seen both on various sites around the internet.
What version of SQL Server are you using? Check its documentation on the JDBC driver as to what class to use, and what the connection string should be.
Try it in a plain java class - can you get a connection just using plain JDBC code?
What values do you use for that?
Hope this helps,
evnafets

MySQL - Connection Pooling - Driver?

Hi there!
I am looking for a JDBC 2.0 compatible driver to use with MySQL. I would like to use connection pooling in a webapplication (JSP:s and Servlets) but I have just found out that the driver I usually use mmmysql do not support connection pooling. Hence, my question: Where can I find a driver to use with MySQL with support for Connection Pooling?
bw

have you tried resin..
http://www.caucho.com/projects/jdbc-mysql/index.xtp
i haven't checked it yet but it could be an option
i'm currently using mmmysql driver also...I tried that driver and when I had more than one statement open at the same time, it gave me garbage results and then threw an exception. So I'm using the mmmysql driver too.

Error using mySQL connection Pool

I see the following error when my application uses the connection pool - can anyone explain this ?
INFO: CORE3282: stdout: =======================>ERROR :com.sun.enterprise.repository.J2EEResourceException
WARNING: CORE3283: stderr: at com.sun.enterprise.resource.IASNonSharedResourcePool.initPool(IASNonSharedResourcePool.java:416)
WARNING: CORE3283: stderr: at com.sun.enterprise.resource.IASNonSharedResourcePool.internalGetResource(IASNonSharedResourcePool.java:625)
WARNING: CORE3283: stderr: at com.sun.enterprise.resource.IASNonSharedResourcePool.getResource(IASNonSharedResourcePool.java:520)
INFO: CORE3282: stdout: java.lang.NoSuchMethodException: setdataSourceName

Hi,
You have used dataSourceName property while creating a connection pool.This property is not required to be set while creating a connection pool for MySql
Use the following properties:
<property name="serverName" value="<name of server>"
<property name="port" value="<port number>"
<property name="DatabaseName" value="<your db name>"
<property name="User" value="<user name>"
<property name="Password" value="<passwd>"
Get back in case of any issues

MySQL Connection Pooling

Our application uses castor and MySQL. When running in WebLogic, what is the best (portability is key) way to provide a connection pool to my application?
Thanks in advance!
George Redens
Sr. Developer
CertAlert Software, Inc

Do you write the code that obtains your JDBC
connections, or is it embedded in Castor?
If you can write the code that obtains your
jdbc connections, then the standard pool
documentation is what you should follow.
If you do not have direct access to the
code creating your JDBC connections,
tell us how you specify them, and maybe you
can use our pools, and maybe not.
Joe

MySQL connection pooling guidelines

Dear tribe,
Although using autoReconnect=true in my pool definition, I keep running out of connections...
This morning changed to autoReconnectForPools=true flag (along with autoReconnect) and upgraded to Connector/J 3.0.11.
While I'm waiting to see if this will work out, can someone please point to some guidelines on setting up connection pools specifically for MySQL and AppServer7 or post a working configuration (jar versions, web.xml fragment etc)?
Thanks,
Manos

My initial configuration was exactly that but was failing to connect after leaving the applicatin running for 8 hours. I then added autoReconnect=true and autoReconnectForPools=true. But after leaving the application running without any requests to it, this morning i tried to load a page and got closed connection errors again...
javax.servlet.ServletException: Could not execute query
     at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:478)
     at jasper.monthly_jsp._jspService(_monthly_jsp.java:524)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.iplanet.ias.web.jsp.JspServlet$JspServletWrapper.service(JspServlet.java:552)
     at com.iplanet.ias.web.jsp.JspServlet.serviceJspFile(JspServlet.java:368)
     at com.iplanet.ias.web.jsp.JspServlet.service(JspServlet.java:287)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
     at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:98)
     at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:176)
     at java.security.AccessController.doPrivileged(Native Method)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:172)
     at gr.netsmart.manos2.jstats.filters.WebStatisticsKeeper.doFilter(Unknown Source)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
     at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:98)
     at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:176)
     at java.security.AccessController.doPrivileged(Native Method)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:172)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:265)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:212)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:203)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
     at com.iplanet.ias.web.connector.nsapi.NSAPIProcessor.process(NSAPIProcessor.java:157)
     at com.iplanet.ias.web.WebContainer.service(WebContainer.java:598)
Root Cause
net.sf.hibernate.JDBCException: Could not execute query
     at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1478)
     at net.sf.hibernate.impl.QueryImpl.list(QueryImpl.java:39)
     at jasper.monthly_jsp._jspService(_monthly_jsp.java:158)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.iplanet.ias.web.jsp.JspServlet$JspServletWrapper.service(JspServlet.java:552)
     at com.iplanet.ias.web.jsp.JspServlet.serviceJspFile(JspServlet.java:368)
     at com.iplanet.ias.web.jsp.JspServlet.service(JspServlet.java:287)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
     at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:98)
     at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:176)
     at java.security.AccessController.doPrivileged(Native Method)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:172)
     at gr.netsmart.manos2.jstats.filters.WebStatisticsKeeper.doFilter(Unknown Source)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
     at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:98)
     at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:176)
     at java.security.AccessController.doPrivileged(Native Method)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:172)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:265)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:212)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:203)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
     at com.iplanet.ias.web.connector.nsapi.NSAPIProcessor.process(NSAPIProcessor.java:157)
     at com.iplanet.ias.web.WebContainer.service(WebContainer.java:598)
Caused by: java.sql.SQLException: No operations allowed after connection closed.
Connection was closed due to the following exception:
** BEGIN NESTED EXCEPTION **
java.sql.SQLException
MESSAGE: Communication link failure: java.io.EOFException, underlying cause: null
** BEGIN NESTED EXCEPTION **
java.io.EOFException
STACKTRACE:
java.io.EOFException
     at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1319)
     at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1463)
     at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1854)
     at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1109)
     at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1203)
     at com.mysql.jdbc.MysqlIO.sqlQuery(MysqlIO.java:1164)
     at com.mysql.jdbc.Connection.execSQL(Connection.java:2087)
     at com.mysql.jdbc.Connection.execSQL(Connection.java:2049)
     at com.mysql.jdbc.Connection.execSQL(Connection.java:2030)
     at com.mysql.jdbc.Connection.rollbackNoChecks(Connection.java:3004)
     at com.mysql.jdbc.Connection.rollback(Connection.java:1458)
     at com.sun.enterprise.resource.JdbcXAConnection$JdbcConnection.getCurrentConnection(JdbcXAConnection.java:640)
     at com.sun.enterprise.resource.JdbcXAConnection$JdbcConnection.prepareStatement(JdbcXAConnection.java:378)
     at net.sf.hibernate.impl.BatcherImpl.getPreparedStatement(BatcherImpl.java:228)
     at net.sf.hibernate.impl.BatcherImpl.prepareQueryStatement(BatcherImpl.java:61)
     at net.sf.hibernate.loader.Loader.prepareQueryStatement(Loader.java:703)
     at net.sf.hibernate.loader.Loader.doQuery(Loader.java:184)
     at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:132)
     at net.sf.hibernate.loader.Loader.doList(Loader.java:949)
     at net.sf.hibernate.loader.Loader.list(Loader.java:940)
     at net.sf.hibernate.hql.QueryTranslator.list(QueryTranslator.java:833)
     at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1475)
     at net.sf.hibernate.impl.QueryImpl.list(QueryImpl.java:39)
     at jasper.monthly_jsp._jspService(_monthly_jsp.java:158)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.iplanet.ias.web.jsp.JspServlet$JspServletWrapper.service(JspServlet.java:552)
     at com.iplanet.ias.web.jsp.JspServlet.serviceJspFile(JspServlet.java:368)
     at com.iplanet.ias.web.jsp.JspServlet.service(JspServlet.java:287)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
     at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:98)
     at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:176)
     at java.security.AccessController.doPrivileged(Native Method)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:172)
     at gr.netsmart.manos2.jstats.filters.WebStatisticsKeeper.doFilter(Unknown Source)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
     at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:98)
     at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:176)
     at java.security.AccessController.doPrivileged(Native Method)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:172)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:265)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:212)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:203)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
     at com.iplanet.ias.web.connector.nsapi.NSAPIProcessor.process(NSAPIProcessor.java:157)
     at com.iplanet.ias.web.WebContainer.service(WebContainer.java:598)
** END NESTED EXCEPTION **
STACKTRACE:
java.sql.SQLException: Communication link failure: java.io.EOFException, underlying cause: null
** BEGIN NESTED EXCEPTION **
java.io.EOFException
STACKTRACE:
java.io.EOFException
     at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1319)
     at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1463)
     at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1854)
     at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1109)
     at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1203)
     at com.mysql.jdbc.MysqlIO.sqlQuery(MysqlIO.java:1164)
     at com.mysql.jdbc.Connection.execSQL(Connection.java:2087)
     at com.mysql.jdbc.Connection.execSQL(Connection.java:2049)
     at com.mysql.jdbc.Connection.execSQL(Connection.java:2030)
     at com.mysql.jdbc.Connection.rollbackNoChecks(Connection.java:3004)
     at com.mysql.jdbc.Connection.rollback(Connection.java:1458)
     at com.sun.enterprise.resource.JdbcXAConnection$JdbcConnection.getCurrentConnection(JdbcXAConnection.java:640)
     at com.sun.enterprise.resource.JdbcXAConnection$JdbcConnection.prepareStatement(JdbcXAConnection.java:378)
     at net.sf.hibernate.impl.BatcherImpl.getPreparedStatement(BatcherImpl.java:228)
     at net.sf.hibernate.impl.BatcherImpl.prepareQueryStatement(BatcherImpl.java:61)
     at net.sf.hibernate.loader.Loader.prepareQueryStatement(Loader.java:703)
     at net.sf.hibernate.loader.Loader.doQuery(Loader.java:184)
     at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:132)
     at net.sf.hibernate.loader.Loader.doList(Loader.java:949)
     at net.sf.hibernate.loader.Loader.list(Loader.java:940)
     at net.sf.hibernate.hql.QueryTranslator.list(QueryTranslator.java:833)
     at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1475)
     at net.sf.hibernate.impl.QueryImpl.list(QueryImpl.java:39)
     at jasper.monthly_jsp._jspService(_monthly_jsp.java:158)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.iplanet.ias.web.jsp.JspServlet$JspServletWrapper.service(JspServlet.java:552)
     at com.iplanet.ias.web.jsp.JspServlet.serviceJspFile(JspServlet.java:368)
     at com.iplanet.ias.web.jsp.JspServlet.service(JspServlet.java:287)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
     at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:98)
     at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:176)
     at java.security.AccessController.doPrivileged(Native Method)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:172)
     at gr.netsmart.manos2.jstats.filters.WebStatisticsKeeper.doFilter(Unknown Source)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
     at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:98)
     at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:176)
     at java.security.AccessController.doPrivileged(Native Method)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:172)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:265)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:212)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:203)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
     at com.iplanet.ias.web.connector.nsapi.NSAPIProcessor.process(NSAPIProcessor.java:157)
     at com.iplanet.ias.web.WebContainer.service(WebContainer.java:598)
** END NESTED EXCEPTION **
     at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1638)
     at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1854)
     at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1109)
     at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1203)
     at com.mysql.jdbc.MysqlIO.sqlQuery(MysqlIO.java:1164)
     at com.mysql.jdbc.Connection.execSQL(Connection.java:2087)
     at com.mysql.jdbc.Connection.execSQL(Connection.java:2049)
     at com.mysql.jdbc.Connection.execSQL(Connection.java:2030)
     at com.mysql.jdbc.Connection.rollbackNoChecks(Connection.java:3004)
     at com.mysql.jdbc.Connection.rollback(Connection.java:1458)
     at com.sun.enterprise.resource.JdbcXAConnection$JdbcConnection.getCurrentConnection(JdbcXAConnection.java:640)
     at com.sun.enterprise.resource.JdbcXAConnection$JdbcConnection.prepareStatement(JdbcXAConnection.java:378)
     at net.sf.hibernate.impl.BatcherImpl.getPreparedStatement(BatcherImpl.java:228)
     at net.sf.hibernate.impl.BatcherImpl.prepareQueryStatement(BatcherImpl.java:61)
     at net.sf.hibernate.loader.Loader.prepareQueryStatement(Loader.java:703)
     at net.sf.hibernate.loader.Loader.doQuery(Loader.java:184)
     at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:132)
     at net.sf.hibernate.loader.Loader.doList(Loader.java:949)
     at net.sf.hibernate.loader.Loader.list(Loader.java:940)
     at net.sf.hibernate.hql.QueryTranslator.list(QueryTranslator.java:833)
     at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1475)
     at net.sf.hibernate.impl.QueryImpl.list(QueryImpl.java:39)
     at jasper.monthly_jsp._jspService(_monthly_jsp.java:158)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.iplanet.ias.web.jsp.JspServlet$JspServletWrapper.service(JspServlet.java:552)
     at com.iplanet.ias.web.jsp.JspServlet.serviceJspFile(JspServlet.java:368)
     at com.iplanet.ias.web.jsp.JspServlet.service(JspServlet.java:287)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
     at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:98)
     at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:176)
     at java.security.AccessController.doPrivileged(Native Method)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:172)
     at gr.netsmart.manos2.jstats.filters.WebStatisticsKeeper.doFilter(Unknown Source)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
     at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:98)
     at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:176)
     at java.security.AccessController.doPrivileged(Native Method)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:172)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:265)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:212)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:203)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
     at com.iplanet.ias.web.connector.nsapi.NSAPIProcessor.process(NSAPIProcessor.java:157)
     at com.iplanet.ias.web.WebContainer.service(WebContainer.java:598)
** END NESTED EXCEPTION **
     at com.mysql.jdbc.Connection.checkClosed(Connection.java:2225)
     at com.mysql.jdbc.Connection.setAutoCommit(Connection.java:501)
     at com.sun.enterprise.resource.JdbcXAConnection$JdbcConnection.getCurrentConnection(JdbcXAConnection.java:641)
     at com.sun.enterprise.resource.JdbcXAConnection$JdbcConnection.prepareStatement(JdbcXAConnection.java:378)
     at net.sf.hibernate.impl.BatcherImpl.getPreparedStatement(BatcherImpl.java:228)
     at net.sf.hibernate.impl.BatcherImpl.prepareQueryStatement(BatcherImpl.java:61)
     at net.sf.hibernate.loader.Loader.prepareQueryStatement(Loader.java:703)
     at net.sf.hibernate.loader.Loader.doQuery(Loader.java:184)
     at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:132)
     at net.sf.hibernate.loader.Loader.doList(Loader.java:949)
     at net.sf.hibernate.loader.Loader.list(Loader.java:940)
     at net.sf.hibernate.hql.QueryTranslator.list(QueryTranslator.java:833)
     at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1475)
     ... 27 more

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