Are you using a finally bock to close your connections? You might be reaching the maximum connections allowed in the pool for DBCP. Please provide an example of a query statement where you do try/catch/finally. If you are not checking if your connections are not null and then making a last ditch attempt to close them in the finally block, then that may very well be the problem.
Also, your URL should have "?autoReconnect=true" appended to the "url" value since you are using MySQL.
Jake
At 10:29 PM 3/31/2003 -0700, you wrote:
Hello Again Everyone! I know I have already sent out a message or three about this, but I need to resolve it pretty quickly. I found a work around, but I would like a sanity check from those of you who really understand this stuff. I included a method that I wrote to get Connections, You can see the old and the new along side each other. The "manual" method allows me to query till the cows come home.. The "Resource" method gives me 12 DB hits on 4.1.18 and 5 on 4.1.24 (tested on both solaris 8 and 9) before it appears to hang. Oddly enough I can't pinpoint what is hanging because I have added log statements to this method and it appears to be working.. but substituting those two lines below removes the issue, so I believe it is returning an invalid connection or something that I don't understand.
Thanks for any time spent on reading this!
/******************** Method Start ************************/ public static Connection getConnection () throws Exception {
Connection connection; try { /*********** Old Version Context ctx = new InitialContext (); if ( ctx == null ) throw new Exception ("No Context"); DataSource ds; ds = (DataSource)ctx.lookup ("java:comp/env/jdbc/CIHDB"); if ( ds != null ) connection = ds.getConnection(); else { return null; }//end of else ************ End of old version */ Class.forName ("com.mysql.jdbc.Driver").newInstance(); connection = DriverManager.getConnection ( "jdbc:mysql://localhost/cih", "User","PassWord"); }//end of try catch ( Exception e ) { throw (e); }//end of catch return connection; }//end getConnection
/***** Web.xml definition <resource-ref> <description> Resource reference to a factory for java.sql.Connection instance that may be used for talking to a particular database that is configured in the server.xml file </description> <res-ref-name>jdbc/CIHDB</res-ref-name> <res-type>javax.sql.DataSource</res-type> <res-auth>Container</res-auth> </resource-ref>
/****** server.xml <Context path="/cih" docBase="cih" debug="0" reloadable="true" crossContext="true">
<Logger className="org.apache.catalina.logger.FileLogger" prefix="localhost_CIH." suffix=".txt" timestamp="true"/>
<Resource name="jdbc/CIHDB" auth="Container" type="javax.sql.DataSource"/>
<ResourceParams name="jdbc/CIHDB"> <parameter> <name>factory</name>
<value>org.apache.commons.dbcp.BasicDataSourceFactory</value> </parameter> <parameter> <name>username</name> <value>User</value> </parameter> <parameter> <name>password</name> <value>Password</value> </parameter> <parameter> <name>driverClassName</name> <value>com.mysql.jdbc.Driver</value> </parameter> <parameter> <name>url</name> <value>jdbc:mysql://localhost/cih</value> </parameter> <parameter> <name>removeAdandoned</name> <value>true</value> </parameter> <parameter> <name>removeAdandonedTimeout</name> <value>120</value> </parameter> <parameter> <name>MaxActive</name> <value>50</value> </parameter> <parameter> <name>MaxIdle</name> <value>10</value> </parameter> <parameter> <name>MaxWait</name> <value>200</value> </parameter> </ResourceParams> </Context>
Steve Gums
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