ojdbc14.jar connection pool cache issue

[ken zhu]

/**
* java file1 named ServerInformationInit, initinal connection pool cache. Any update need?
*
*/
public static OracleDataSource ods = new OracleDataSource(); // is a statci variable will be used in other java file
prop.setProperty("MinLimit", "5");// set cache properties
prop.setProperty("MaxLimit", "20");
prop.setProperty("InitialLimit", "5");
prop.setProperty("ConnectionWaitTimeout","3");
prop.setProperty("InactivityTimeout", "3");
ods.setConnectionCachingEnabled(true); // be sure set to true
ods.setConnectionCacheProperties(prop);
ods.setConnectionCacheName("eform_db_cache"); // this cache's name
url = "jdbcracle:thin:@" + EformAplProperty.getDbHostName() + ":" +
EformAplProperty.getDbPort() + ":" + EformAplProperty.getDbSid();
ods.setURL(url);
ods.setUser(EformAplProperty.getDbUserName());
ods.setPassword(EformAplProperty.getDbPassword());


/**
* java file 2 named DefnSqlManager is all DAO file's parent
*/
connection = ServerInformationInit.ods.getConnection();
...............
OracleConnectionCacheManager occm =
OracleConnectionCacheManager.getConnectionCacheManagerInstance();
System.out.println
(occm.getNumberOfAvailableConnections("eform_db_cache")
+ " connections are available in cache " + "eform_db_cache");
System.out.println
(occm.getNumberOfActiveConnections("eform_db_cache")
+ " connections are active");

/**
* java file 3 named QaCmptCaseSqlManager extend DefnSqlManager, which retrieve data from database
*/
sqlMgr = new QaCmptCaseSqlManager();
cmptEntity = sqlMgr.genCmptCaseDoc(docId)
finally {
sqlMgr.closeDbConn();
}

below message is printed in console:
4 connections are available in cache eform_db_cache
14 connections are active
3 connections are available in cache eform_db_cache
15 connections are active
4 connections are available in cache eform_db_cache
14 connections are active
3 connections are available in cache eform_db_cache
15 connections are active
2 connections are available in cache eform_db_cache
2 connections are available in cache eform_db_cache
16 connections are active
16 connections are active

As you see, the connections are available in cache is less and most of connections are in active.
The result is system will create more and more connection for application, i don't what wrong about it ?