[mysql-cj-abandoned-connection-cleanup] ？

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• [mysql-cj-abandoned-connection-cleanup] ？ mavenjavatomcatmysql

  10月前
  回答 1 已采纳 1、maven环境配置如下：  2、运行时出现如下警示 ``` 13-Jul-2020 21:41:56.634 信息 [mysql-cj-abandoned-connection-cleanup] org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading Illegal access: this web application instance has been stopped already. Could not load []. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access. java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load []. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access. at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1328) at org.apache.catalina.loader.WebappClassLoaderBase.getResource(WebappClassLoaderBase.java:1003) at com.mysql.cj.jdbc.AbandonedConnectionCleanupThread.checkThreadContextClassLoader(AbandonedConnectionCleanupThread.java:117) at com.mysql.cj.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:84) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) ``` 3、window10安装的是MySQL8.0.20，虽不影响使用，可MySQL5.7到8.0版本更替出现这样的问题，心里不踏实。
• Spring框架入门，tomcat启动成功，但是出现关于上下文加载异常？ eclipsejava-eejavaspringtomcat

  2年前
  回答 1 已采纳 这是一个制作登陆页面的小练习，大概长这样  **错误信息是在Server startup后立马就出现的**，还没来得及访问index.jsp呢！求指点，谢谢。 web.xml存放在WEB-INF文件夹下  ## 错误信息： ``` 七月 20, 2019 3:20:35 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Server version: Apache Tomcat/8.5.42 七月 20, 2019 3:20:35 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Server built: Jun 4 2019 20:29:04 UTC 七月 20, 2019 3:20:35 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Server number: 8.5.42.0 七月 20, 2019 3:20:35 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: OS Name: Windows 10 七月 20, 2019 3:20:35 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: OS Version: 10.0 七月 20, 2019 3:20:35 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Architecture: amd64 七月 20, 2019 3:20:35 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Java Home: C:\Program Files\Java\jdk1.8.0_201\jre 七月 20, 2019 3:20:35 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: JVM Version: 1.8.0_201-b09 七月 20, 2019 3:20:35 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: JVM Vendor: Oracle Corporation 七月 20, 2019 3:20:35 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: CATALINA_BASE: D:\eclipse-workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0 七月 20, 2019 3:20:35 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: CATALINA_HOME: D:\apache-tomcat-8.5.42 七月 20, 2019 3:20:35 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Command line argument: -Dcatalina.base=D:\eclipse-workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0 七月 20, 2019 3:20:35 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Command line argument: -Dcatalina.home=D:\apache-tomcat-8.5.42 七月 20, 2019 3:20:35 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Command line argument: -Dwtp.deploy=D:\eclipse-workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps 七月 20, 2019 3:20:35 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Command line argument: -Djava.endorsed.dirs=D:\apache-tomcat-8.5.42\endorsed 七月 20, 2019 3:20:35 下午 org.apache.catalina.startup.VersionLoggerListener log 信息: Command line argument: -Dfile.encoding=UTF-8 七月 20, 2019 3:20:35 下午 org.apache.catalina.core.AprLifecycleListener lifecycleEvent 信息: Loaded APR based Apache Tomcat Native library [1.2.21] using APR version [1.6.5]. 七月 20, 2019 3:20:35 下午 org.apache.catalina.core.AprLifecycleListener lifecycleEvent 信息: APR capabilities: IPv6 [true], sendfile [true], accept filters [false], random [true]. 七月 20, 2019 3:20:35 下午 org.apache.catalina.core.AprLifecycleListener lifecycleEvent 信息: APR/OpenSSL configuration: useAprConnector [false], useOpenSSL [true] 七月 20, 2019 3:20:35 下午 org.apache.catalina.core.AprLifecycleListener initializeSSL 信息: OpenSSL successfully initialized [OpenSSL 1.1.1a 20 Nov 2018] 七月 20, 2019 3:20:35 下午 org.apache.coyote.AbstractProtocol init 信息: Initializing ProtocolHandler ["http-nio-8080"] 七月 20, 2019 3:20:36 下午 org.apache.tomcat.util.net.NioSelectorPool getSharedSelector 信息: Using a shared selector for servlet write/read 七月 20, 2019 3:20:36 下午 org.apache.coyote.AbstractProtocol init 信息: Initializing ProtocolHandler ["ajp-nio-8009"] 七月 20, 2019 3:20:36 下午 org.apache.tomcat.util.net.NioSelectorPool getSharedSelector 信息: Using a shared selector for servlet write/read 七月 20, 2019 3:20:36 下午 org.apache.catalina.startup.Catalina load 信息: Initialization processed in 1265 ms 七月 20, 2019 3:20:36 下午 org.apache.catalina.core.StandardService startInternal 信息: Starting service [Catalina] 七月 20, 2019 3:20:36 下午 org.apache.catalina.core.StandardEngine startInternal 信息: Starting Servlet Engine: Apache Tomcat/8.5.42 七月 20, 2019 3:20:39 下午 org.apache.catalina.core.ApplicationContext log 信息: No Spring WebApplicationInitializer types detected on classpath 七月 20, 2019 3:20:39 下午 org.apache.jasper.servlet.TldScanner scanJars 信息: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time. 七月 20, 2019 3:20:39 下午 org.apache.catalina.core.ApplicationContext log 信息: Initializing Spring root WebApplicationContext log4j:WARN No appenders could be found for logger (org.springframework.web.context.ContextLoader). log4j:WARN Please initialize the log4j system properly. log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info. 七月 20, 2019 3:20:42 下午 org.apache.catalina.core.StandardContext listenerStart 严重: Exception sending context initialized event to listener instance of class [org.springframework.web.context.ContextLoaderListener] org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'usersService' defined in class path resource [applicationContext.xml]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'usersMapper' of bean class [yan.ibbie.service.impl.UsersServiceImpl]: Bean property 'usersMapper' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter? at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1718) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1433) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:845) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:400) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:291) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:103) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4770) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5236) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1423) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1413) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Caused by: org.springframework.beans.NotWritablePropertyException: Invalid property 'usersMapper' of bean class [yan.ibbie.service.impl.UsersServiceImpl]: Bean property 'usersMapper' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter? at org.springframework.beans.BeanWrapperImpl.createNotWritablePropertyException(BeanWrapperImpl.java:243) at org.springframework.beans.AbstractNestablePropertyAccessor.processLocalProperty(AbstractNestablePropertyAccessor.java:426) at org.springframework.beans.AbstractNestablePropertyAccessor.setPropertyValue(AbstractNestablePropertyAccessor.java:278) at org.springframework.beans.AbstractNestablePropertyAccessor.setPropertyValue(AbstractNestablePropertyAccessor.java:266) at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:97) at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:77) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1714) ... 22 more 七月 20, 2019 3:20:42 下午 org.apache.catalina.core.StandardContext startInternal 严重: One or more listeners failed to start. Full details will be found in the appropriate container log file 七月 20, 2019 3:20:42 下午 org.apache.catalina.core.StandardContext startInternal 严重: Context [/SpringLogin] startup failed due to previous errors 七月 20, 2019 3:20:42 下午 org.apache.catalina.core.ApplicationContext log 信息: Closing Spring root WebApplicationContext 七月 20, 2019 3:20:42 下午 org.apache.catalina.loader.WebappClassLoaderBase clearReferencesJdbc 警告: The web application [SpringLogin] registered the JDBC driver [com.mysql.cj.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered. 七月 20, 2019 3:20:42 下午 org.apache.catalina.loader.WebappClassLoaderBase clearReferencesThreads 警告: The web application [SpringLogin] appears to have started a thread named [mysql-cj-abandoned-connection-cleanup] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread: java.lang.Object.wait(Native Method) java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:144) com.mysql.cj.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:85) java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) java.lang.Thread.run(Thread.java:748) 七月 20, 2019 3:20:42 下午 org.apache.coyote.AbstractProtocol start 信息: Starting ProtocolHandler ["http-nio-8080"] 七月 20, 2019 3:20:42 下午 org.apache.coyote.AbstractProtocol start 信息: Starting ProtocolHandler ["ajp-nio-8009"] 七月 20, 2019 3:20:42 下午 org.apache.catalina.startup.Catalina start 信息: Server startup in 5949 ms 七月 20, 2019 3:20:45 下午 org.apache.catalina.loader.WebappClassLoaderBase checkStateForResourceLoading 信息: Illegal access: this web application instance has been stopped already. Could not load []. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access. java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load []. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access. at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1384) at org.apache.catalina.loader.WebappClassLoaderBase.getResource(WebappClassLoaderBase.java:1034) at com.mysql.cj.jdbc.AbandonedConnectionCleanupThread.checkThreadContextClassLoader(AbandonedConnectionCleanupThread.java:117) at com.mysql.cj.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:84) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) ``` ## web.xml配置如下： ``` contextConfigLocation classpath:applicationContext.xml org.springframework.web.context.ContextLoaderListener ``` ## applicationContext.xml的Spring配置如下： ``` ``` ## index.jsp页面如下： ``` Insert title here ${error } 用户名： 密码： 验证码：看不清 ``` ## 出错的是LoginServlet中一堆aaaaa那行，LoginServlet如下： ``` package yan.ibbie.servlet; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.springframework.context.ApplicationContext; import org.springframework.web.context.support.WebApplicationContextUtils; import yan.ibbie.pojo.Users; import yan.ibbie.service.UsersService; import yan.ibbie.service.impl.UsersServiceImpl; /** * Servlet implementation class LoginServlet */ @WebServlet("/Login") public class LoginServlet extends HttpServlet { private static final long serialVersionUID = 1L; private UsersService usersService; @Override public void init() throws ServletException { System.out.println("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"+getServletContext()); ApplicationContext ac = WebApplicationContextUtils.getRequiredWebApplicationContext(getServletContext()); usersService = ac.getBean("usersService",UsersServiceImpl.class); } @Override protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { String code = req.getParameter("code"); HttpSession session = req.getSession(); String codeSession = session.getAttribute("validcode").toString(); if (codeSession.equals(code)) { Users users = new Users(); String username = req.getParameter("username"); String password = req.getParameter("password"); users.setUsername(username); users.setPasserword(password); Users user = usersService.login(users); if (user!=null) { resp.sendRedirect("main.jsp"); }else { req.setAttribute("error", "用户名和密码不正确"); req.getRequestDispatcher("index.jsp").forward(req, resp); } }else { req.setAttribute("error", "验证码不正确"); req.getRequestDispatcher("index.jsp").forward(req, resp); } } } ```
• PHP / MySQL - 更新查询 phpmysql

  5年前
  回答 2 已采纳 I am trying to fix up some SQL queries in CS-Cart so uses their built in queries better, the following works and further in code loops through and displays products $getOrder=db_get_fields("SELECT * FROM ?:orders WHERE total='".$orderSum."' AND email='".$email."' AND status IN('P','C','O') "); $orderProducts = db_get_fields("SELECT product_id FROM cscart_order_details WHERE order_id='".$getOrder[0]."'"); But i have tried to write using: http://docs.cs-cart.com/4.2.x/core/db/placeholders.html However it only ever returns 1 product so im making a mistake somewhere and no sure what? anyone have any ideas? im rather new to PHP and MySQL $getOrder = db_get_fields("SELECT * FROM ?:orders WHERE total = ?i AND email = ?s AND status IN ('P','C','O')", $orderSum, $email); $orderProducts = db_get_fields("SELECT product_id FROM ?:order_details WHERE order_id = ?a", $getOrder[0]); UPDATE with loop and check: $acId = $_REQUEST['id']; $productsGet = db_get_field("SELECT cart FROM ?:abandoned_cart WHERE user_id = ?s", $acId); $products = unserialize($productsGet); $cartProducts=array(); if (is_array($products) || is_object($products)){ foreach($products as $pData){ $cartProducts[]=$pData['product_id']; } } if(!array_diff($cartProducts,$orderProducts)){ $products=array(); } oh here is the output part but its the issue with the new queries if (!empty($products)) { foreach ($products as $product) { $text .=' <tr> <td><a href="http://'.$_SERVER['SERVER_NAME'].'?dispatch=products.view&product_id='.$product['product_id'].'"> <img title="" height="120" width="120" alt="" src="'.$product['main_pair']['detailed']['image_path'].'"></a></td> <td><a href="#" style=" font-weight:bold; color:#333; font-size:13px; text-decoration:none;">'.$product['product'].'</a><a href="#"> <i></i></a><div style=" font-weight:bold; color:#333; font-size:12px; margin-top:4px; text-decoration:none;"> CODE: <span>'.$product['product_code'].'<!--product_code_update_2512012004--></span> </div></td> <td style=" text-align:center;"><span style=" font-weight:bold; color:#333; font-size:12px; margin-top:4px; text-decoration:none;">$</span><span style=" font-weight:bold; color:#333; font-size:12px; margin-top:4px; text-decoration:none;">'.$product['price'].'</span> </td> <td><div style="display: inline-block;vertical-align: top;width: 56px;"><input type="text" disabled value="'.$product['amount'].'" size="3" style="border:1px solid #c2c9d0; box-shadow:0 1px 3px rgba(0, 0, 0, 0.1) inset; border-radius:3px; float: left;height: 33px;text-align: center;width: 36px;"></div></td> <td style="font-size:14px; font-weight:bold; color:#333; text-align:center; font-size:13px; text-decoration:none;"><span>$</span><span stye=" color:#000;">'.$product['price']*$product['amount'].'</span> </td> </tr>'; $sum =$sum+$product['price']*$product['amount']; } }
• 来自Php脚本的Mysql / Apache连接错误 apachephpmysql

  11年前
  回答 1 已采纳 I am trying to use php. I wrote a small script as instructed in the tutorial. I am using Wampserver 2.0. Connection is fine. But whenever I try to execute the script, I get "Apache HTTP server encountered a problem and needs to close" error message. My localhost is working fine. Normal php scripts without mysql statements in it is working fine. My db connection is ok. So what's the problem? Versions: Php: 5.3.0 Apache: 2.2.11 MySql: 5.1.36 The script: <?php mysql_connect ('localhost', 'root', '') ; mysql_select_db ('blog'); /* * Setup a db table named blog which is gonna contain blog posts * max number of entries: 2,359,296. Because we declared id to be an int of 20. * primary key: id * id - auto increment so that next entry will get the next primary number available */ $sql = "CREATE TABLE blog ( id int(20) NOT NULL auto_increment, timestamp int(20) NOT NULL, title varchar(255) NOT NULL, entry longtext NOT NULL, PRIMARY KEY (id) )"; // Create the blog table $result = mysql_query($sql) or print ("Can't create the table 'blog' in the database!<br />".$sql."<br />". mysql_error()); if ($result != false) { echo "Table 'blog' was successfully created."; } mysql_close(); ?> Apache error log (Don't see anything critical): [Sun Jan 31 09:49:29 2010] [notice] Parent: child process exited with status 3221225477 -- Restarting. [Sun Jan 31 09:49:29 2010] [notice] Apache/2.2.11 (Win32) PHP/5.3.0 configured -- resuming normal operations [Sun Jan 31 09:49:29 2010] [notice] Server built: Dec 10 2008 00:10:06 [Sun Jan 31 09:49:29 2010] [notice] Parent: Created child process 11172 [Sun Jan 31 09:49:29 2010] [notice] Child 11172: Child process is running [Sun Jan 31 09:49:29 2010] [notice] Child 11172: Acquired the start mutex. [Sun Jan 31 09:49:29 2010] [notice] Child 11172: Starting 64 worker threads. [Sun Jan 31 09:49:29 2010] [notice] Child 11172: Starting thread to listen on port 80. [Sun Jan 31 09:49:32 2010] [notice] Parent: child process exited with status 3221225477 -- Restarting. [Sun Jan 31 09:49:33 2010] [notice] Apache/2.2.11 (Win32) PHP/5.3.0 configured -- resuming normal operations [Sun Jan 31 09:49:33 2010] [notice] Server built: Dec 10 2008 00:10:06 [Sun Jan 31 09:49:33 2010] [notice] Parent: Created child process 10244 [Sun Jan 31 09:49:33 2010] [notice] Child 10244: Child process is running [Sun Jan 31 09:49:33 2010] [notice] Child 10244: Acquired the start mutex. [Sun Jan 31 09:49:33 2010] [notice] Child 10244: Starting 64 worker threads. [Sun Jan 31 09:49:33 2010] [notice] Child 10244: Starting thread to listen on port 80. EDIT: Fixed. Just downgraded the Php version to 5.2.8.
• 如何在laravel中使用特殊消息管理特殊错误 laravelphp

  4年前
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• tomcat启动web应用时候报错 tomcat

  10年前
  回答 5 已采纳 [size=large] 这是在启动tomcat的web应用的时候就报错，因为这个错误是不定期出现的，所以很难扑捉到。在网上搜索了一下相关的解决方案，但是也没有解决问题。大侠们，给帮忙解决一下吧！！！小女，谢过哦！！！！！ 2011-11-04 16:40:23,304 WARN [org.hibernate.util.JDBCExceptionReporter-logExceptions] - 2011-11-04 16:40:23,330 ERROR [org.hibernate.util.JDBCExceptionReporter-logExceptions] - 2011-11-04 16:40:23,344 WARN [org.hibernate.cfg.SettingsFactory-buildSettings] - java.sql.SQLException: An attempt by a client to checkout a Connection has timed out. at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:106) at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:65) at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:527) at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:128) at org.springframework.orm.hibernate3.LocalDataSourceConnectionProvider.getConnection(LocalDataSourceConnectionProvider.java:81) at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:84) at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2073) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1298) at org.springframework.orm.hibernate3.LocalSessionFactoryBean.newSessionFactory(LocalSessionFactoryBean.java:805) at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:745) at org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java:134) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1143) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1110) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:431) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:254) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:144) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:251) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:163) at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:271) at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:128) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1047) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:843) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:427) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:254) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:144) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:251) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:163) at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:271) at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:128) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1047) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:843) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:427) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:254) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:144) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:251) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:163) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:284) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:352) at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:241) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:184) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:49) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3972) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4467) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546) at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1041) at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:964) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:502) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053) at org.apache.catalina.core.StandardHost.start(StandardHost.java:785) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443) at org.apache.catalina.core.StandardService.start(StandardService.java:519) at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) at org.apache.catalina.startup.Catalina.start(Catalina.java:581) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414) Caused by: com.mchange.v2.resourcepool.TimeoutException: A client timed out while waiting to acquire a resource from com.mchange.v2.resourcepool.BasicResourcePool@199dcfe -- timeout at awaitAvailable() at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1317) at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:557) at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:477) at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:525) ... 62 more [/size]
• Intelliji Idea开发ssh项目部署到服务器上的tomcat无法运行。求教！ tomcatintellij-idea

  4年前
  回答 1 已采纳 在本地tomcat环境是可以运行的。 struts2-convention-plugin-2.5.13.jar，这个jar包不知道发生什么错误。 错误日志提示如下： 20-Sep-2017 18:46:27.428 INFO [http-nio-8080-exec-23] org.apache.catalina.core.ApplicationContext.log HTMLManager: start: Starting web application '/myroom' 20-Sep-2017 18:46:28.548 INFO [http-nio-8080-exec-23] org.apache.jasper.servlet.TldScanner.scanJars At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time. 20-Sep-2017 18:46:28.552 INFO [http-nio-8080-exec-23] org.apache.catalina.core.ApplicationContext.log No Spring WebApplicationInitializer types detected on classpath 20-Sep-2017 18:46:28.644 INFO [http-nio-8080-exec-23] org.apache.catalina.core.ApplicationContext.log Initializing Spring root WebApplicationContext 20-Sep-2017 18:46:31.102 SEVERE [http-nio-8080-exec-23] org.apache.catalina.core.StandardContext.filterStart Exception starting filter [struts2] Unable to load configuration. - bean - jar:file:/usr/local/apache-tomcat-9.0.0.M26/webapps/myroom/WEB-INF/lib/struts2-convention-plugin-2.5.13.jar!/struts-plugin.xml:32:155 at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:499) at org.apache.struts2.dispatcher.InitOperations.initDispatcher(InitOperations.java:75) at org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:63) at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:283) at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:264) at org.apache.catalina.core.ApplicationFilterConfig.(ApplicationFilterConfig.java:108) at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4491) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5131) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) at org.apache.catalina.manager.ManagerServlet.start(ManagerServlet.java:1303) at org.apache.catalina.manager.HTMLManagerServlet.start(HTMLManagerServlet.java:665) at org.apache.catalina.manager.HTMLManagerServlet.doPost(HTMLManagerServlet.java:211) at javax.servlet.http.HttpServlet.service(HttpServlet.java:660) at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.filters.CsrfPreventionFilter.doFilter(CsrfPreventionFilter.java:136) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:592) at org.apache.catalina.valves.RequestFilterValve.process(RequestFilterValve.java:348) at org.apache.catalina.valves.RemoteAddrValve.invoke(RemoteAddrValve.java:52) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:651) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:498) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:796) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1374) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748) Caused by: Unable to load configuration. - bean - jar:file:/usr/local/apache-tomcat-9.0.0.M26/webapps/myroom/WEB-INF/lib/struts2-convention-plugin-2.5.13.jar!/struts-plugin.xml:32:155 at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:70) at org.apache.struts2.dispatcher.Dispatcher.getContainer(Dispatcher.java:906) at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:445) at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:486) ... 40 more Caused by: Unable to load bean: type:org.apache.struts2.convention.ActionConfigBuilder class:org.apache.struts2.convention.PackageBasedActionConfigBuilder - bean - jar:file:/usr/local/apache-tomcat-9.0.0.M26/webapps/myroom/WEB-INF/lib/struts2-convention-plugin-2.5.13.jar!/struts-plugin.xml:32:155 at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:247) at org.apache.struts2.config.StrutsXmlConfigurationProvider.register(StrutsXmlConfigurationProvider.java:98) at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:240) at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:67) ... 43 more Caused by: java.lang.IncompatibleClassChangeError: Implementing class at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:763) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at org.apache.catalina.loader.WebappClassLoaderBase.findClassInternal(WebappClassLoaderBase.java:2257) at org.apache.catalina.loader.WebappClassLoaderBase.findClass(WebappClassLoaderBase.java:799) at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1238) at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1104) at java.lang.Class.getDeclaredConstructors0(Native Method) at java.lang.Class.privateGetDeclaredConstructors(Class.java:2671) at java.lang.Class.getDeclaredConstructors(Class.java:2020) at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:237) ... 46 more 20-Sep-2017 18:46:31.104 SEVERE [http-nio-8080-exec-23] org.apache.catalina.core.StandardContext.startInternal One or more Filters failed to start. Full details will be found in the appropriate container log file 20-Sep-2017 18:46:31.104 SEVERE [http-nio-8080-exec-23] org.apache.catalina.core.StandardContext.startInternal Context [/myroom] startup failed due to previous errors 20-Sep-2017 18:46:31.104 INFO [http-nio-8080-exec-23] org.apache.catalina.core.ApplicationContext.log Closing Spring root WebApplicationContext 20-Sep-2017 18:46:31.129 WARNING [http-nio-8080-exec-23] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesJdbc The web application [myroom] registered the JDBC driver [com.alibaba.druid.proxy.DruidDriver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered. 20-Sep-2017 18:46:31.130 WARNING [http-nio-8080-exec-23] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesJdbc The web application [myroom] registered the JDBC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered. 20-Sep-2017 18:46:31.130 WARNING [http-nio-8080-exec-23] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [myroom] appears to have started a thread named [Abandoned connection cleanup thread] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread: java.lang.Object.wait(Native Method) java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143) com.mysql.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:43) 20-Sep-2017 18:46:31.137 INFO [http-nio-8080-exec-23] org.apache.catalina.core.ApplicationContext.log HTMLManager: list: Listing contexts for virtual host '47.94.164.52'
• 连接池的Connection问题

  8年前
  回答 3 已采纳 项目中使用了proxool数据源，配置了静态创建连接类。   public class DBConnection { public static Connection getConn() throws Exception{ return DriverManager.getConnection("proxool.db_master"); } public static void closeDB(Connection conn){ try{ if (conn!=null) conn.close(); }catch (Exception e) { // TODO: handle exception } }}  那这样使用的时候还需不需要调用Connection.close()方法呢？ try{conn.close();conn=null;}catch(Exception e){} 这个close方法是直接调用了java.sql.Connection.close()方法，这样是不是绕过连接池直接关闭 Conn了呢？ 如果需要那么Connection就是我手动关闭的，跟连接池没什么关系？ 如果不关闭的话那是什么时候关闭呢？ 请达人给我解释一下。               
• super 的一个小的问题 希望得到确认 Java核心技术卷 一 java

  4年前
  回答 2 已采纳  在主函数中,有语句 System.out.println("carl.equals(boss): " + carl.equals(boss)); 也就是说 carl.equals(boss), 到manager函数中有 ``` public boolean equals(Object otherObject) { if (!super.equals(otherObject)) return false; Manager other = (Manager) otherObject; // super.equals checked that this and other belong to the same class return bonus == other.bonus; } ``` 这个super是调用父类中的方法,也就是说carl和boss先调用父类中的这个方法进行比较,这个是对的吗?
• java核心技术卷一 equals方法 EqualTest.java java

  4年前
  回答 4 已采纳 ``` public class EqualTest { public static void main(String[] args) { Employee alice1 = new Employee("Alice Adams", 75000, 1989, 12, 15); Employee alice2 = alice1; Employee alice3 = new Employee("Alice Adams", 75000, 1989, 12, 15); Employee bob = new Employee("Bob Brandson", 50000, 1989, 10, 1); System.out.println("alice1 == alice2: "+(alice1==alice2)); System.out.println("alice1 == alice3: "+(alice1==alice3)); System.out.println("alice1.equals(alice3): "+alice1.equals(alice3)); System.out.println("alice1.equals(bob): "+alice1.equals(bob)); System.out.println("bob.toString(): "+bob); Manager car1 = new Manager("Carl Cracker", 80000, 1987, 12, 15); Manager boss = new Manager("Carl Cracker", 80000, 1987, 12, 15); boss.setBonus(5000); System.out.println("boss.toString(): "+boss); System.out.println("carl.equals(boss): "+car1.equals(boss)); System.out.println("alice1.hashCode(): "+alice1.hashCode()); System.out.println("alice3.hashCode(): "+alice3.hashCode()); System.out.println("bob.hashCode(): "+bob.hashCode()); System.out.println("car1.hashCode(): "+car1.hashCode()); } } import java.util.Date; import java.util.GregorianCalendar; import java.util.Objects; public class Employee { private String name; private double salary; private Date hireDay; public Employee(String n,double s,int year,int month,int day){ name = n; salary = s; GregorianCalendar calendar = new GregorianCalendar(year,month-1,day); hireDay = calendar.getTime(); } public String getName(){ return name; } public double getSalary(){ return salary; } public Date getHireDay(){ return hireDay; } public void raiseSalary(double byPercent){ double raise = salary * byPercent / 100; salary += raise; } public boolean equals(Object otherObject){ //这里获得一个对象参数，第一个if语句判断两个引用是否是同一个，如果是那么这两个对象肯定相等 if(this == otherObject) return true; //这里判断这个参数是否引用空值 if(otherObject == null) return false; //getClass()方法是得到对象的类，这里就是如果两个对象的类不一样，那么就不相等 if(getClass()!=otherObject.getClass()) return false; //在以上判断完成，再将得到的参数对象强制转换为该对象，考虑到父类引用子类的对象的出现，然后再判断对象的属性是否相同 Employee other = (Employee)otherObject; return Objects.equals(name, other.name)&&salary ==other.salary&& Objects.equals(hireDay, other.hireDay); } //哈希散列，有自己的计算方法，根据字符串来得到一段数字 public int hashCode(){ return Objects.hash(name,salary,hireDay); } //toString()方法，可自动生成 @Override public String toString() { return getClass().getName()+ "[name=" + name + ", salary=" + salary + ", hireDay=" + hireDay + "]"; } } public class Manager extends Employee { private double bonus; public Manager(String n,double s, int year,int month,int day){ super(n, s, year, month, day); bonus = 0; } public double getSalary(){ double baseSalary = super.getSalary(); return baseSalary + bonus; } public void setBonus(double b){ bonus = b; } public boolean equals(Object otherObject){ if(!super.equals(otherObject)) return false; Manager other = (Manager)otherObject; return bonus == other.bonus; } public int hashCode(){ return super.hashCode()+17*new Double(bonus).hashCode(); } public String toString(){ return super.toString()+"[bonus=]"+bonus+"]"; } } ``` 这个程序里面有一部分，是public boolean equals（object otherObject）方法， 在这个方法的return语句里面莫名其妙的出现了一个Object.equals(a,b),我不明白这个是从哪里来的，求大神解释一下。
• SSM整合警告：mysql-cj-abandoned-connection-cleanup

  9月前
  YH大叔的博客 09-Aug-2020 01:18:00.659 INFO [mysql-cj-abandoned-connection-cleanup] org.apache.catalina.loader.WebappClassLoader.findResourceInternal Illegal access: this web application instance has been stopped ...
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  1月前
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• mysql报错 应用程序_tomcat关闭的时候报错：web应用程序似乎启动了一个名为[mysql-cj-abandoned-connection-cleanup]的线程，但未停止，可能会造成内存泄漏...

  3月前
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  3年前
  存在感zero的博客 今天进行SSM框架整合并使用多数据源配置（oracle+mysql），具体配置如下：1、spring.xml<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="...
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  3年前
  JAVA道人的博客 警告: The web application [xx] appears to have started a thread named [Abandoned connection cleanup thread] but has failed to stop it. This is very likely to create a memory leak. Stack trace ...
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  3年前
  zhangphh的博客 转自：【解决】com.mysql.cj.jdbc.Driver failed to unregister it /Abandoned connection cleanup thread 错误： 16-May-2018 19:34:22.638 警告 [main] org.apache.catalina.loader.WebappClassLoaderBase....
• tomcat重启警告：Abandoned connection cleanup thread)

  3年前
  csdn_cdy的博客 tomcat重启警告：Abandoned connection cleanup thread) 报错信息 The web application [HelloWeb] appears to have started a thread named [Abandoned connection cleanup thread] but has failed to stop it. ...
• Abandoned connection cleanup thread failed to stop

  2年前
  sayWhat_sayHello的博客 A web application appears to have started a thread named [Abandoned connection cleanup thread] but has failed to stop it. This is very likely to create a memory leak. 解决： 升级mysql-connector-...
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  4年前
  shihengli2010的博客 本地服务启动没有问题，部署到tomcat就报错。 网上查找了一些资料 ，还是很容易就解决了。 1.启动tomcat报错的信息太少了，而且很容易混淆视听，我们需要更详细的信息来查找报错原因。 ... 在WEB-INF/classes目录下...