Hi, Nope, I can't help unfortunately. I used Tomcat 4.1 for years connecting to Oracle 8i and 9i, and I continue to do so now with Tomcat 5.0 and 5.5. Maybe I'm just lucky, but the docs (specifically the JDBC DataSources how-to) have always worked for me out of the box. I've never seen the error you describe.
Yoav Shapira Millennium Research Informatics >-----Original Message----- >From: Shilpa Nalgonda [mailto:[EMAIL PROTECTED] >Sent: Wednesday, September 22, 2004 10:44 AM >To: Tomcat Users List >Subject: RE: Tomcat 4.1 Connection Pooling... > >Hi Yoav Shapira, >Can you put some light on this pooling stuff... >Thanks. >Shilpa. > >-----Original Message----- >From: Shilpa Nalgonda [mailto:[EMAIL PROTECTED] >Sent: Wednesday, September 22, 2004 9:31 AM >To: Tomcat Users List >Subject: RE: Tomcat 4.1 Connection Pooling... > > >Hi Cary, >I am running my application on both windowsxp and Linux. And my Oracle >version is 8i. >I have the same problem on both OS. I think increasing the number of >processes would not help. >This has got something to do with Tomcat connection pooling configuration. >I am missing some configuration stuff there... >if i use these below parameters in server.xml iget timeout exception...just >after couple of requests.. >maxActive :20 >maxIdle :10 >mxWait :10000 >removeAbandoned :true >"org.apache.commons.dbcp.SQLNestedException: Cannot get a connection, pool >exhausted, cause: >java.util.NoSuchElementException: Timeout waiting for idle object " > >And if i use this below configuration i get ORA:00020 exception... >maxActive :0 >maxIdle :0 >mxWait :0 >removeAbandoned :true > >Can you please help---i have been looking into this since 2 days and still >it doesn't work... > >-----Original Message----- >From: Cary Conover [mailto:[EMAIL PROTECTED] >Sent: Tuesday, September 21, 2004 10:09 PM >To: Tomcat Users List >Subject: RE: Tomcat 4.1 Connection Pooling... > > >Shilpa, > >What OS are you running this configuration on? If it is AIX I would >investigate to see how the system is configured for the number of processes >per user on the system. If it is configured as a Workstation it is >defaulted to 128 processes / login. If it is configured as a server it is >set to 500 processes / login. Plus Oracle support site suggests in the >neighborhood of 2500 processes / login for Oracle 9i to function well if >you >are running 9i. These are all system settings that can be found in smitty >on the system and adjusted as root user. > >Hope this helps, > >Cary > >Shilpa Nalgonda <[EMAIL PROTECTED]> wrote: >Can someone please suggest how to achieve connection Pooling in tomcat 4.1. >As per the docs i have >1) configured server.xml to include the resource parameters ( datasource, >connection pool size etc) >2) In application code , retrieve connection using datasource >3) Every Method call to database retrieves connection >using datasource.getConnection () >and closes connection everytime > >But still the pooling is not achieved, i get ORA-00020 error( maximim >proceses exceeded), i increased the size from 30 to 200) even then it is >not >working. > >Can someone please help---- > >-----Original Message----- >From: Shilpa Nalgonda [mailto:[EMAIL PROTECTED] >Sent: Monday, September 20, 2004 12:55 PM >To: Tomcat Users List >Subject: org.apache.commons.dbcp.SQLNestedException: Cannot get a >connection, pool exhausted, cause: > > >Hi, I am getting the timeout exception for connection pooling, i am using >Tomca 4.1 and datasource to retrieve connections. >I am attaching all the soure code and configuration files used in my >application, please suggest where iam doing wrong... > >SEVERE: getConnection()--SQLException >org.apache.commons.dbcp.SQLNestedException: Cannot get a connection, pool >exhausted, cause: >java.util.NoSuchElementException: Timeout waiting for idle object >at >org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObje ctPo >o >l.java:801) >at >org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSour ce.j >a >va:140) >at >org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.j ava: >5 >18) >at >com.mypublisher.oemapi.DAO.DBAccess.getConnection(DBAccess.java:47) >at com.mypublisher.oemapi.DAO.Persister.(Persister.java:46) >at >com.mypublisher.oemapi.SubmitOrder.SubmitOrder(SubmitOrder.java:61) >at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) >at >sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.ja va:3 >9 >) >at >sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccesso rImp >l >.java:25) >at java.lang.reflect.Method.invoke(Method.java:324) >at org.apache.xmlrpc.Invoker.execute(Invoker.java:168) >at >org.apache.xmlrpc.XmlRpcWorker.invokeHandler(XmlRpcWorker.java:123) >at org.apache.xmlrpc.XmlRpcWorker.execute(XmlRpcWorker.java:185) >at org.apache.xmlrpc.XmlRpcServer.execute(XmlRpcServer.java:151) >at org.apache.xmlrpc.XmlRpcServer.execute(XmlRpcServer.java:128) >at >com.mypublisher.oemapi.xmlrpc.XmlRpcServlet.doPost(XmlRpcServlet.java >======================================================================= ==== >= >=========== >server.xml >--------- >xmlrpc-oemapi--> >debug="5" reloadable="true" crossContext="true" useNaming="true"> > >prefix="localhost_rpcoemapi_log." suffix=".txt" >timestamp="true"/> >auth="Container" >type="javax.sql.DataSource"/> > > > > >factory >org.apache.commons.dbcp.BasicDataSourceFactory > > > > configure your mysqld max_connections large enough to handle > all of your db connections. Set to 0 for no limit. > --> > > >maxActive >5 > > > > Set to 0 for no limit. > --> > > >maxIdle >2 > > > > in ms, in this example 10 seconds. An Exception is thrown if > this timeout is exceeded. Set to -1 to wait indefinitely. > --> > > >maxWait >10000 > > > > > > >username >ioeadmin > > > > >password >ioeadmin > > > > > > >driverClassName >oracle.jdbc.driver.OracleDriver > > > > The autoReconnect=true argument to the url makes sure that the > mm.mysql JDBC Driver will automatically reconnect if mysqld closed >the > connection. mysqld by default closes idle connections after 8 >hours. > --> > > >url >jdbc:oracle:thin:@ipaddress:1521:MYDB > > > > > >======================================================================= ==== >= >=================================== >DatasourceFactory is a singleton class used to retrieve the datasource from >tomcat using JNDi..and connection is obtained from datasource... >public static DataSource getInstance() throws SystemException >{ >if (!isDataSrcAvaliable) >{ >if (dataSource == null) >{ >new DataSourceFactory(); >doLookUp(); >isDataSrcAvaliable = true; >} //end if (dataSource == null) >}// end if (!isDataSrcAvaliable) >return dataSource; >} /* end getInstance() */ > >doLookUp method does this: >Context ctx = new InitialContext(); >String dataSrc = >msgResource.getMessage(OEMAPIConstants.DATA_SOURCE_NAME); >Context env = (Context)ctx.lookup("java:comp/env"); >dataSource = (DataSource) env.lookup(dataSrc); > > >public static Connection getConnection() throws DAOException >{ >DataSource ds = (DataSource) DataSourceFactory.getInstance(); >Connection con = ds.getConnection(); >return ds.getConnection(); >} >and every database lookup class, gets this connection and closes the >connection after the query to database... > > > >--------------------------------------------------------------------- >To unsubscribe, e-mail: [EMAIL PROTECTED] >For additional commands, e-mail: [EMAIL PROTECTED] > > >--------------------------------------------------------------------- >To unsubscribe, e-mail: [EMAIL PROTECTED] >For additional commands, e-mail: [EMAIL PROTECTED] > > > > > >--------------------------------- >Do you Yahoo!? >New and Improved Yahoo! 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