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该问题已被官方收录

启动jmeter内存溢出

1

压测

class="cursor-pointer"> 详细描述

该问题已被官方收录

压测完毕之后访问页面出现这个提示

0

1

压测

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

该问题已被官方收录

本地服务器和云服务器进行压测吞吐量差距过大

2

1

压测

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

该问题已被官方收录

使用Jmeter压测的时候报错

1

压测

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

该问题已被官方收录

Memcache缓存加载，加载不成功

0

1

缓存相关

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

 //查询所有数据信息
    @Override
    public List<Paper> queryAllPaper() throws Exception {
        List<Paper> paperList = memcachedClient.get("paperList");
        try {
            if (paperList != null) {
                logger.info("---从缓存中查询所有---");
                paperList =memcachedClient.get("paperList");
                logger.info("---从缓存查询ID等于448的记录:"+memcachedClient.get("448")+"---");
                logger.info("---从数据库查询ID等于448的记录:"+paperDao.queryById(448)+"---");
            } else {
                logger.info("---从数据库中查询所有---");
                paperList = paperDao.queryAllPaper();
                boolean list = memcachedClient.set("paperList", 0, paperList);
                logger.info("---新增所有数据缓存:" + list+"---");
                logger.info("---从缓存查询ID等于448的记录:"+memcachedClient.get("448")+"---");
                logger.info("---从数据库查询ID等于448的记录:"+paperDao.queryById(448)+"---");
            }
        } catch (Throwable t) {
            t.printStackTrace();
        }
        return paperDao.queryAllPaper();
    }



    //删除论文
    @Override
    public boolean deletePaperById(long id) throws Exception {
        boolean delete = false;
        logger.info("即将删除的id："+id);
        logger.info("memcachedClient.get(String.valueOf(id)):"+memcachedClient.get(String.valueOf(id)));
        if (memcachedClient.get(String.valueOf(id)) != null) {
            delete = memcachedClient.delete(String.valueOf(id));
            logger.info("---删除缓存数据：" + delete+"---");
        } else {
            logger.info("---没有该数据可以删除的数据---");
        }
        if (delete) {
            memcachedClient.flushAll();
            logger.info("---删除信息，刷新缓存---");

        }
        return paperDao.deletePaperById(id);
    }

[INFO ] 2018-08-17 06:39:49,253 method:com.controller.PaperController.queryAllPaper(PaperController.java:34) 跳转到查询所有数据页面.
[INFO ] 2018-08-17 06:39:49,254 method:com.aop.AopController.printExecTime(AopController.java:66) com.controller.PaperController.queryAllPaper Controller 类方法执行耗时: 852
17-Aug-2018 06:39:49.314 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory C:\Program Files\Apache Software Foundation\Tomcat 8.0\webapps\manager has finished in 76 ms
[INFO ] 2018-08-17 06:46:26,688 method:com.controller.PaperController.deleteUser(PaperController.java:55) controller:开始删除数据...
[INFO ] 2018-08-17 06:46:26,689 method:com.aop.AopImpl.timeAround(AopImpl.java:36) ---进入Database类方法切面中---

[INFO ] 2018-08-17 06:46:26,690 method:com.aop.AopImpl.timeAround(AopImpl.java:45) ---开始执行时间:2018-08-17 06:46:26
[INFO ] 2018-08-17 06:46:26,690 method:com.service.impl.PaperServiceImpl.deletePaperById(PaperServiceImpl.java:45) 即将删除的id：457
[INFO ] 2018-08-17 06:46:26,700 method:com.service.impl.PaperServiceImpl.deletePaperById(PaperServiceImpl.java:46) memcachedClient.get(String.valueOf(id)):null
[INFO ] 2018-08-17 06:46:26,712 method:com.service.impl.PaperServiceImpl.deletePaperById(PaperServiceImpl.java:51) ---没有该数据可以删除的数据---
[INFO ] 2018-08-17 06:46:35,238 method:com.aop.AopImpl.timeAround(AopImpl.java:36) ---进入Database类方法切面中---

[INFO ] 2018-08-17 06:46:35,239 method:com.aop.AopImpl.timeAround(AopImpl.java:45) ---开始执行时间:2018-08-17 06:46:35
[INFO ] 2018-08-17 06:46:45,866 method:org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:316) Loading XML bean definitions from class path resource [org/springframework/jdbc/support/sql-error-codes.xml]
[INFO ] 2018-08-17 06:46:45,896 method:org.springframework.jdbc.support.SQLErrorCodesFactory.<init>(SQLErrorCodesFactory.java:126) SQLErrorCodes loaded: [DB2, Derby, H2, HSQL, Informix, MS-SQL, MySQL, Oracle, PostgreSQL, Sybase]
[ERROR] 2018-08-17 06:46:45,907 method:com.aop.AopImpl.timeAround(AopImpl.java:50) ---统计DataBase方法执行耗时环绕通知出错---
org.springframework.dao.RecoverableDataAccessException: 
### Error updating database.  Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet successfully received from the server was 416,483 milliseconds ago.  The last packet sent successfully to the server was 19,130 milliseconds ago.
### The error may involve com.dao.PaperDao.deletePaperById-Inline
### The error occurred while setting parameters
### SQL: DELETE FROM paper WHERE paper_id=?
### Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet successfully received from the server was 416,483 milliseconds ago.  The last packet sent successfully to the server was 19,130 milliseconds ago.
; SQL []; Communications link failure

The last packet successfully received from the server was 416,483 milliseconds ago.  The last packet sent successfully to the server was 19,130 milliseconds ago.; nested exception is com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

该问题已被官方收录

redis缓存对象时，对象已经序列化之后，还是报错

0

1

redis

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

实体类：
public class People implements Serializable {}
配置文件：
<!--扫描redis配置文件-->
    <context:property-placeholder ignore-unresolvable="true" location="classpath:redis.properties"/>
    <!--设置连接池-->
    <bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">
        <property name="maxIdle" value="${redis.maxIdle}"/>
        <property name="maxTotal" value="${redis.maxTotal}"/>
        <property name="maxWaitMillis" value="${redis.maxWaitMillis}"/>
        <property name="testOnBorrow" value="${redis.testOnBorrow}"/>
        <property name="testOnReturn" value="${redis.testOnReturn}"/>
    </bean>
    <!--设置链接属性-->
    <bean id="connectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"
          p:hostName="${redis.host}"
          p:port="${redis.port}"
          p:pool-config-ref="poolConfig"
          p:timeout="100000"/>
    <!-- Jedis模板配置  -->
    <bean id="redisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate">
        <property name="connectionFactory" ref="connectionFactory"/>
    </bean>

该问题已被官方收录

整合memcaceh是property文件报错

1

压测

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

该问题已被官方收录

压测时遇到的数据库连接异常

1

压测

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

Type Exception Report

Message Servlet.init() for servlet [JSPServlet] threw exception

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

javax.servlet.ServletException: Servlet.init() for servlet [JSPServlet] threw exception
	org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:491)
	org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668)
	org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
	org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:764)
	org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1388)
	org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	java.lang.Thread.run(Thread.java:748)
Root Cause

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'stuPage': Unsatisfied dependency expressed through field 'studentservice'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.jnshu.service.Studentservice' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true), @org.springframework.beans.factory.annotation.Qualifier(value=stu)}
	org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:587)
	org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:91)
	org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:373)
	org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1350)
	org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:580)
	org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:503)
	org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317)
	org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
	org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315)
	org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
	org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:760)
	org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:869)
	org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550)
	org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:672)
	org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:638)
	org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:686)
	org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:554)
	org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:499)
	org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:172)
	javax.servlet.GenericServlet.init(GenericServlet.java:158)
	org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:491)
	org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668)
	org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
	org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:764)
	org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1388)
	org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	java.lang.Thread.run(Thread.java:748)
Root Cause

org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.jnshu.service.Studentservice' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true), @org.springframework.beans.factory.annotation.Qualifier(value=stu)}
	org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1509)
	org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1104)
	org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1065)
	org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:584)
	org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:91)
	org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:373)
	org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1350)
	org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:580)
	org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:503)
	org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317)
	org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
	org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315)
	org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
	org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:760)
	org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:869)
	org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550)
	org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:672)
	org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:638)
	org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:686)
	org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:554)
	org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:499)
	org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:172)
	javax.servlet.GenericServlet.init(GenericServlet.java:158)
	org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:491)
	org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668)
	org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
	org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:764)
	org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1388)
	org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	java.lang.Thread.run(Thread.java:748)

class="cursor-pointer"> 源码

package com.jnshu.service.impl;

import com.jnshu.dao.StudentInfoMapper;
import com.jnshu.pojo.Admin;
import com.jnshu.pojo.StudentInfo;
import com.jnshu.service.Studentservice;
import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.stereotype.Service;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import java.util.List;
//@RunWith(SpringJUnit4ClassRunner.class)
//@ContextConfiguration(locations = "classpath:application.xml")
@Service("stu")
public class Studentserviceimpl implements Studentservice {

//    List<StudentInfo>lists;
//    StudentInfo studentInfo;
//    Admin admin;
//    @Autowired
//    @Qualifier("userMapper")
    @Autowired
    private StudentInfoMapper studentInfoMapper;

//public StudentInfoMapper getConn(){
//    ApplicationContext applicationContext = new ClassPathXmlApplicationContext("classpath:application.xml");
//    StudentInfoMapper studentInfoMapper2=(StudentInfoMapper)applicationContext.getBean("userMapper");
//    return studentInfoMapper2;
//}


    public int insertSTU(StudentInfo studentInfo) throws Exception {
//        studentInfoMapper=getConn();
        studentInfoMapper.insertSTU(studentInfo);
        return studentInfo.getId();
    }


    public int deleteByID(Integer id) throws Exception {
//        studentInfoMapper=getConn();
        return  studentInfoMapper.deleteByID(id);//影响行数
    }

    public List<StudentInfo> listTable() throws Exception {
//        studentInfoMapper=getConn();
        return studentInfoMapper.listTable();
    }


    public int updateByID(StudentInfo studentInfo) throws Exception {
//        studentInfoMapper=getConn();
        studentInfoMapper.updateByID(studentInfo);
        return studentInfo.getId();
    }


    public List<StudentInfo> findByLikeName(String studentName) throws Exception {
//        studentInfoMapper=getConn();
        return studentInfoMapper.findByLikeName(studentName);
    }


    public StudentInfo findByStudentID(Integer id) throws Exception {
//        studentInfoMapper=getConn();
        return studentInfoMapper.findByStudentID(id);
    }


    public int register(Admin admin) throws Exception {
//        studentInfoMapper=getConn();
        studentInfoMapper.register(admin);
        return admin.getId();
    }


    public Admin checkLogin(Admin admin) throws Exception {
//        studentInfoMapper=getConn();
        return studentInfoMapper.checkLogin(admin);
    }

}

该问题已被官方收录

Redis升级高版本报错解决方法

1

redis

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 源码

java.lang.NoClassDefFoundError: org/apache/commons/pool2/impl/GenericObjectPoolConfig
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2957)
at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1210)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1690)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
at com.huxin.utils.HuDaiApiListener.contextInitialized(HuDaiApiListener.java:33)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4994)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5492)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:649)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:1083)
at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1879)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.pool2.impl.GenericObjectPoolConfig
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
... 21 more

该问题已被官方收录

memcache有三种客户端，在实际应用中如何取舍？

2

1

memcache

class="cursor-pointer"> 详细描述