MaxOpenPreparedStatements達到的限制

我得到這個異常只適用於運行幾天後我的代碼中的一些數據庫更新。一些請求通過，其中一些（相同的java代碼）失敗。MaxOpenPreparedStatements達到的限制

java.sql.SQLException: MaxOpenPreparedStatements limit reached 
     at org.apache.commons.dbcp.PoolingConnection.prepareStatement(PoolingConnection.java:109) 
     at org.apache.commons.dbcp.DelegatingConnection.prepareStatement(DelegatingConnection.java:281) 
     at org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.prepareStatement(PoolingDataSource.java:313) 
     at com.prog.C.f(C.java:967) 
     at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885) 
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907) 
     at java.lang.Thread.run(Thread.java:619) 
Caused by: java.util.NoSuchElementException 
     at org.apache.commons.pool.impl.GenericKeyedObjectPool.borrowObject(GenericKeyedObjectPool.java:808) 
     at org.apache.commons.dbcp.PoolingConnection.prepareStatement(PoolingConnection.java:107) 
     ... 15 more

數據源配置：

<bean id="DataSource" class="org.apache.commons.dbcp.BasicDataSource" 
      destroy-method="close" lazy-init="true" scope="singleton"> 
     <property name="driverClassName" value="${jdbc.driver.class}"/> 
     <property name="url" value="${jdbc.url}"/> 
     <property name="username" value="${jdbc.username}"/> 
     <property name="password" value="${jdbc.password}"/> 
     <property name="poolPreparedStatements" value="true"/> 
     <property name="maxOpenPreparedStatements" value="20"/> 
    </bean>

有百達可用的連接。我該如何解決它？謝謝。

來源

2010-08-05 alex543