[英]java.lang.IllegalArgumentException: number of arguments must be even at org.javalite.activejdbc.Model.set
[英]I got this error quite often: org.javalite.activejdbc.DBException: Cannot open a new connection
當我離開一個頁面10分鍾然后刷新或快速刷新一個頁面多次(控制器在其中啟動查詢的頁面)時,出現此錯誤。
與此處相同的錯誤: https : //github.com/javalite/activejdbc/issues/268
我將ActiveJdbc的1.4.13.j7和c3p0-0.9.1.2用於連接池。
這是我的代碼:用於連接的Singleton
import com.mchange.v2.c3p0.DataSources;
import java.sql.SQLException;
import javax.sql.DataSource;
import java.util.logging.Level;
import java.util.logging.Logger;
public class ConnectionPool {
private DataSource dataSourceUnpooled;
private DataSource dataSourcePooled;
private static ConnectionPool instance;
private ConnectionPool() {
init();
}
public static synchronized ConnectionPool getInstance() {
if (instance == null) {
instance = new ConnectionPool();
}
return instance;
}
private void init() {
try {
Class.forName("org.postgresql.Driver");
dataSourceUnpooled = DataSources.unpooledDataSource("jdbc:postgresql://127.0.0.1:5432/mydb", "postgres", "");
dataSourcePooled = DataSources.pooledDataSource(dataSourceUnpooled);
} catch (ClassNotFoundException | SQLException ex) {
Logger.getLogger(ConnectionPool.class.getName()).log(Level.SEVERE, null, ex);
}
}
public DataSource getConnection() {
return dataSourcePooled;
}
}
這是引發異常的控制器的示例
Base.open(ConnectionPool.getInstance().getConnection());
List<Game> games= Game.where("add_on_id = ?)", addOnId);
games.size();
Base.close();
return "addOnView";
我已經看到一些人在網上搜索解決方案時也遇到了這個問題,但是我沒有找到解決問題的人。 我使用打開和關閉,所以我不知道問題出在哪里。
我有做錯什么嗎?
編輯:
這是整個statcktrace
HTTP狀態500-請求處理失敗; 嵌套異常是org.javalite.activejdbc.DBException:無法打開新連接,因為現有連接仍在當前線程上,名稱:默認,連接實例:com.mchange.v2.c3p0.impl.NewProxyConnection@50ed26eb。 這可能表明您的應用程序中存在邏輯錯誤。
類型例外報告
消息請求處理失敗; 嵌套異常是org.javalite.activejdbc.DBException:無法打開新連接,因為現有連接仍在當前線程上,名稱:默認,連接實例:com.mchange.v2.c3p0.impl.NewProxyConnection@50ed26eb。 這可能表明您的應用程序中存在邏輯錯誤。
描述服務器遇到內部錯誤,導致服務器無法滿足此請求。
exception
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.javalite.activejdbc.DBException: Cannot open a new connection because existing connection is still on current thread, name: default, connection instance: com.mchange.v2.c3p0.impl.NewProxyConnection@50ed26eb. This might indicate a logical error in your application.
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:982)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)
com.myapp.config.ActiveJdbcFilter.doFilter(ActiveJdbcFilter.java:46)
root cause
org.javalite.activejdbc.DBException: Cannot open a new connection because existing connection is still on current thread, name: default, connection instance: com.mchange.v2.c3p0.impl.NewProxyConnection@50ed26eb. This might indicate a logical error in your application.
org.javalite.activejdbc.DB.checkExistingConnection(DB.java:235)
org.javalite.activejdbc.DB.open(DB.java:186)
org.javalite.activejdbc.Base.open(Base.java:106)
com.myapp.controllers.AddOnController.addOns(AddOnController.java:145)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:483)
org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:114)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)
com.myapp.config.ActiveJdbcFilter.doFilter(ActiveJdbcFilter.java:46)
note The full stack trace of the root cause is available in the Apache Tomcat/8.0.27 logs.
我認為您的代碼有一些問題。 這是我的建議:
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