Dear Dan, Thanks for your response!
I have cross checked the user / password configuration. All is correct. As i mentioned that initially i am getting the object of connection but after some time (After few hits to database from application) my web app goes to slow and than it stops working i i got the below exception- *org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot get a connection, pool error Timeout waiting for idle object* I searched for this and find that reason is "maxWait" ms then i set it to -1 i think which tends to unlimited time. Still i am facing the same problem. Can you please let me know what others reason can cause this exception. *Best Regards, * *Saurabh Sarasvat* On Fri, Apr 4, 2014 at 5:16 PM, Daniel Mikusa <dmik...@gopivotal.com> wrote: > On Apr 4, 2014, at 1:19 AM, Saurabh Saraswat <ssaras...@pivotalindia.com> > wrote: > > > Dear All, > > > > I am doing connection pooling with tomcat 7.0.39 and MySQL 5.5.After > > searching on google and with your help i have done the below things. > > Even i am able to get the connection successfully using this but getting > > some trouble and exception. > > I am explaining you all steps done by me- > > > > *1. Have created a context.xml* > > > > I have put this context.xml in the META-INF folder of my application. but > > when i am deploying the web app to the server then it is not creating its > > copy to ${CATALINA-BASE}/conf/Catalina/locathost. Why is that so ? > > There are a couple possibilities. > > 1.) Look at "deployXML" attribute of your <Host> tag. If this is set to > false, it will disable parsing the context XML descriptor embedded inside > the application. This defaults to true, unless you are running with a > security manager, then it defaults to false. > > > http://tomcat.apache.org/tomcat-7.0-doc/config/host.html#Standard_Implementation > > 2.) Look at the "copyXML" attribute of both your <Host> and <Context> > tags. This needs to be set to true, because the default in Tomcat 7 is > false. > > > http://tomcat.apache.org/tomcat-7.0-doc/config/host.html#Standard_Implementation > > http://tomcat.apache.org/tomcat-7.0-doc/config/context.html#Standard_Implementation > > If both attributes are set properly, you should see the > META-INF/context.xml file from your application copied to > "$CATALINA_BASE/conf/Catalina/localhost". > > > > > But when i am putting this context.xml in ${CATALINA-BASE}/conf folder > then > > its working. > > > > <?xml version="1.0" encoding="UTF-8"?> > > > > > > <Context> > > <Resource name="jdbc/MaxDB" auth="Container" type="javax.sql.DataSource" > > maxActive="100" maxIdle="30" maxWait="-1" > > username="root" password="root" > > driverClassName="com.mysql.jdbc.Driver" > > > > > url="jdbc:MySQL://localhost:3306/MaxDB?zeroDateTimeBehavior=convertToNull"/> > > > > </Context> > > > > *2. Mapping in web.xml* > > > > <resource-ref> > > <description>MySql DataSource</description> > > <res-ref-name>jdbc/MaxDB</res-ref-name> > > <res-type>javax.sql.DataSource</res-type> > > <res-auth>Container</res-auth> > > </resource-ref> > > > > *3. Then on my servlet i am getting the object of connection like this-* > > > > private static InitialContext ic; > > protected static DataSource datasource; > > private static Context ctx; > > > > public void doSomeStuff() throws DatabaseException > > { > > Connection conn = null; > > try > > { > > conn= getConnection(); > > > > ..................................... > > // do the required stuff > > > > } > > catch (Exception ex) > > { > > > > } > > finally > > { > > conn.close(); > > } > > > > } > > > > *4. This is the method in my DAO Class i am using this method to get the > > object of connection at all of my servlet.* > > > > protected static Connection getConnection() throws DatabaseException > > { > > Connection conn = null; > > try > > { > > ctx = new InitialContext(); > > datasource = (DataSource) > > ctx.lookup("java:/comp/env/jdbc/MaxDB"); > > conn = datasource.getConnection(); > > } > > catch (Exception ex) > > { > > > > } > > return conn; > > } > > > > Using all this i am able to get connection. But if number of hits > increases > > to the server and Initially i got the the below exception- > > > > *org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot get a connection, > > pool error Timeout waiting for idle object* > > This means it was unable to get a connection from the pool within > "maxWait" ms. There are a few reasons this could happen, but I'd guess > it's because of the next error that you reported. > > > > > Then i got the exception- > > > > *org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create > > PoolableConnectionFactory (Access denied for user 'root'@'localhost' > (using > > password: YES))* > > Seems like you can't connect to the database. Have you double checked > your user / password / host configuration info? > > Dan > > > > > Please assist me to know the root cause of the problem. I have searched > it > > on google and have read lots of forum but did not get the satisfactory > > answer. > > > > Hope that you all are expert and your suggestion will be valuable for me. > > > > Thanking You! > > > > *Best Regards, * > > > > *Saurabh Sarasvat* > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > >