JDBC最大連接數

Question

我在這個問題上堅持了過去兩天，我有一個web服務，從本地數據庫提取數據將其轉換爲XML發送到另一個web服務與HttpGet並獲得成功或faile的響應並更新我的本地數據庫。一段時間後，我開始收到此錯誤：

java.sql.SQLException: Couldn't get connection because we are at maximum connection count (20/20) and there are none available

我試圖在我的server.xml和的applicationContext增加MAXCONNECTION但沒有什麼變化，一段時間出現這種情況後始終，

這是我的數據源

<!-- Data sources --> 
<bean id="dataSourceStore" name="dataSourceStore"  class="org.springframework.jndi.JndiObjectFactoryBean" destroy-method="close"> 
    <property name="jndiName"> 
     <value>java:comp/env/jdbc/StoreDS</value> 
    </property> 
    <property name="removeAbandoned" value="true"/> 
    <property name="initialSize" value="250" /> 
    <property name="maxActive" value="350" /> 
</bean> 

我有2種方法來查詢數據庫去，在他們之後我用這個關閉

public void close() { 
    try { 
     if (!this.getJdbcTemplate().getDataSource().getConnection().isClosed()) { 
      this.getJdbcTemplate().getDataSource().getConnection().close(); 
     } 
    } catch (Exception e) { 
     e.printStackTrace(); 
     // Logger.getLogger(myDAOImpl.class.getName()).log(Level.SEVERE, null, e); 
    } 
    } 

繼承人一個例子

public void updateStatus(Integer id, String name) { 
    super.getJdbcTemplate().update(
      QueryUtil.QueryAtualizaPedido, 
      name, id); 
    close(); 

} 

我server.xml中也有maxActive =「250」，我試圖改變這幾次，但錯誤總是20/20

The server encountered an internal error() that prevented it from fulfilling this request.</u></p><p><b>exception</b> <pre>org.hibernate.exception.GenericJDBCException: Cannot open connection org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:126) org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:114) org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66) org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:52) org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:449) org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:167) org.hibernate.jdbc.BorrowedConnectionProxy.invoke(BorrowedConnectionProxy.java:74) com.sun.proxy.$Proxy221.prepareStatement(Unknown Source) br.com.fiorde.dao.conexao.connect.PreparedSt(connect.java:54) br.com.fiorde.servlets.webservice.ImportPedidoXML.validaUsuario(ImportPedidoXML.java:137) br.com.fiorde.servlets.webservice.ImportPedidoXML.doPost(ImportPedidoXML.java:93) br.com.fiorde.servlets.webservice.ImportPedidoXML.doGet(ImportPedidoXML.java:80)javax.servlet.http.HttpServlet.service(HttpServlet.java:617) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)</pre></p><p><b>root cause</b> <pre>java.sql.SQLException: Couldn't get connection because we are at maximum connection count (20/20) and there are none available org.logicalcobwebs.proxool.Prototyper.quickRefuse(Prototyper.java:309) org.logicalcobwebs.proxool.ConnectionPool.getConnection(ConnectionPool.java:152) org.logicalcobwebs.proxool.ProxoolDriver.connect(ProxoolDriver.java:89) java.sql.DriverManager.getConnection(DriverManager.java:571) java.sql.DriverManager.getConnection(DriverManager.java:233) org.hibernate.connection.ProxoolConnectionProvider.getConnection(ProxoolConnectionProvider.java:75) org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:446) org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:167) org.hibernate.jdbc.BorrowedConnectionProxy.invoke(BorrowedConnectionProxy.java:74) com.sun.proxy.$Proxy221.prepareStatement(Unknown Source) br.com.fiorde.dao.conexao.connect.PreparedSt(connect.java:54) br.com.fiorde.servlets.webservice.ImportPedidoXML.validaUsuario(ImportPedidoXML.java:137) br.com.fiorde.servlets.webservice.ImportPedidoXML.doPost(ImportPedidoXML.java:93) br.com.fiorde.servlets.webservice.ImportPedidoXML.doGet(ImportPedidoXML.java:80) javax.servlet.http.HttpServlet.service(HttpServlet.java:617) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) 

Answer 1

這通常是當您完成使用它們時未能關閉連接的結果。這被稱爲連接泄漏。

當您完成使用它們時，您是否關閉連接？