sql server 2008(SP1)-10.0.2531.0(x64)运行一段时间，就出现Insufficient system memory in resource pool 'internal' to run thr query_course

注：本数据库服务器和另一个数据库服务器做了镜像，问题出现在PRIMARY机器上。 数据库服务器的内存是8G，现在将数据库能用的“最大服务器内存”设成2GB，应该足够用了。 但总是过一段时间由于SQLS

java web项目如何上线_course

java web项目如何上线??需要学习Linux 那些内容????

我申请了个阿里云服务器，我需要自己安装java吗?_course

申请了个云服务器，选的centOS6.5 64位。 给了我帐号密码，我可以远程连接。 我是不是要自己给我的服务器安装jre,tomcat?

求救，阿里云Linux服务器Tomcat报错，被折磨了一下午也没找到问题出在哪儿。_course

我的流程：1、阿里云Linux，重装系统盘CentOS7.6 x64，清空磁盘内容。2、用Xftp传输apache-tomcat-7.0.82和jdk-7u80-linux-x64.tar.gz并用指令解压。3、向etc/profile内export JAVA环境变量并用sorce刷新文件。4、用vim指令更改Tomcat/conf/server.xml中的8080接口为80。5、转到/bin目录下启动startup.sh，可ping通但外网无法访问，随后启动shutdown.sh。 第5步的控制台内容如下： [root@iZj6c1q38vbvbchvmhrp3gZ bin]# ./startup.sh Using CATALINA_BASE: /usr/web/apache-tomcat-7.0.82 Using CATALINA_HOME: /usr/web/apache-tomcat-7.0.82 Using CATALINA_TMPDIR: /usr/web/apache-tomcat-7.0.82/temp Using JRE_HOME: /usr/web/jdk1.7.0_80/jre Using CLASSPATH: /usr/web/apache-tomcat-7.0.82/bin/bootstrap.jar:/usr/web/apache-tomcat-7.0.82/bin/tomcat-juli.jar Tomcat started. [root@iZj6c1q38vbvbchvmhrp3gZ bin]# ./shutdown.sh Using CATALINA_BASE: /usr/web/apache-tomcat-7.0.82 Using CATALINA_HOME: /usr/web/apache-tomcat-7.0.82 Using CATALINA_TMPDIR: /usr/web/apache-tomcat-7.0.82/temp Using JRE_HOME: /usr/web/jdk1.7.0_80/jre Using CLASSPATH: /usr/web/apache-tomcat-7.0.82/bin/bootstrap.jar:/usr/web/apache-tomcat-7.0.82/bin/tomcat-juli.jar Oct 07, 2017 3:12:04 PM org.apache.catalina.startup.Catalina stopServer SEVERE: Could not contact localhost:8005. Tomcat may not be running. Oct 07, 2017 3:12:05 PM org.apache.catalina.startup.Catalina stopServer SEVERE: Catalina.stop: java.net.ConnectException: Connection refused at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:579) at java.net.Socket.connect(Socket.java:528) at java.net.Socket.<init>(Socket.java:425) at java.net.Socket.<init>(Socket.java:208) at org.apache.catalina.startup.Catalina.stopServer(Catalina.java:499) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.apache.catalina.startup.Bootstrap.stopServer(Bootstrap.java:343) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:430) [root@iZj6c1q38vbvbchvmhrp3gZ bin]# 不尽感激！！！！

阿里云轻量应用服务器配置了tomcat后外部浏览器无法访问_course

1相关规则已经配置了  2.tomcat已经开启  3.查看端口 （正在监听）  问题，外部浏览器还是无法访问服务器  找了一天的问题，没找到源头在哪里，心态炸裂了

阿里云tomcat启动了,但是通过公网访问不了_course

新弄的阿里云，新装了JDK和tomcat，然后启动tomcat，然后通过公网访问tomcat，页面打不开

如何将Java Application部署到阿里云ESC服务器_course

我在阿里云上购买了ESC服务器，并且使用了他的免费镜像 包含了 Mysql、JDK1.8、Tomcat， 经过测试我的WEB项目部署没有异常，正常使用。 这几天在MyEclipse10上写了一个关于Socket通信的demo，不再是WEB项目而是Java Application了。 按照以往的经验，将项目打包成war包，上传。不能运行。 于是开始搜索解决方法，说是将项目源码打包成jar文件，第三方jar包也一同上传在服务器上编译，可是我发现我的ESC服务器javac命令无法使用， 提示 Could nor find this command，再次搜索解决方案，说是JDK环境没有配置好，于是修改etc/profile文件，将环境配置好，重启服务器。 还是不行！！！ javac命令还是无法使用。 现在我认为可能服务器运行JAVA application 可能没那么麻烦，只是我走进了死胡同，希望有大佬给我指点一下！谢谢

在阿里云租了台Windows server 2019服务器 打开服务器网也上不了 怎么把jdk Tomcat 这些东西弄进去呢？？？_course

用自己的电脑远程也不了 只能用阿里云的远程连接去连接 我应该怎么去把jdk Tomcat 这些东西 给搞到服务器上面呢，求各位大神帮忙！！！！

Centos7(阿里云)启动不了tomcat9_course

问题：启动tomcat9失败。 环境：jdk1.8.0 + tomcat9 + apr+ tomcat-native 日志： 02-Apr-2018 23:12:28.183 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server version: Apache Tomcat/9.0.6 02-Apr-2018 23:12:28.185 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server built: Mar 5 2018 09:34:35 UTC 02-Apr-2018 23:12:28.186 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server number: 9.0.6.0 02-Apr-2018 23:12:28.186 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log OS Name: Linux 02-Apr-2018 23:12:28.186 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log OS Version: 3.10.0-514.26.2.el7.x86_64 02-Apr-2018 23:12:28.186 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Architecture: amd64 02-Apr-2018 23:12:28.186 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Java Home: /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.161-0.b14.el7_4.x86_64/jre 02-Apr-2018 23:12:28.186 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Version: 1.8.0_161-b14 02-Apr-2018 23:12:28.186 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Vendor: Oracle Corporation 02-Apr-2018 23:12:28.186 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_BASE: /usr/local/tomcat 02-Apr-2018 23:12:28.186 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_HOME: /usr/local/tomcat 02-Apr-2018 23:12:28.187 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.config.file=/usr/local/tomcat/conf/logging.properties 02-Apr-2018 23:12:28.187 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager 02-Apr-2018 23:12:28.187 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djdk.tls.ephemeralDHKeySize=2048 02-Apr-2018 23:12:28.187 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.protocol.handler.pkgs=org.apache.catalina.webresources 02-Apr-2018 23:12:28.187 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dignore.endorsed.dirs= 02-Apr-2018 23:12:28.187 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.base=/usr/local/tomcat 02-Apr-2018 23:12:28.187 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.home=/usr/local/tomcat 02-Apr-2018 23:12:28.187 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.io.tmpdir=/usr/local/tomcat/temp 02-Apr-2018 23:12:28.187 INFO [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent Loaded APR based Apache Tomcat Native library [1.2.16] using APR version [1.6.3]. 02-Apr-2018 23:12:28.187 INFO [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent APR capabilities: IPv6 [true], sendfile [true], accept filters [false], random [true]. 02-Apr-2018 23:12:28.188 INFO [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent APR/OpenSSL configuration: useAprConnector [false], useOpenSSL [true] 02-Apr-2018 23:12:28.207 INFO [main] org.apache.catalina.core.AprLifecycleListener.initializeSSL OpenSSL successfully initialized [OpenSSL 1.0.2k-fips 26 Jan 2017] 02-Apr-2018 23:12:28.373 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["http-nio-8080"] 02-Apr-2018 23:12:28.397 INFO [main] org.apache.tomcat.util.net.NioSelectorPool.getSharedSelector Using a shared selector for servlet write/read 02-Apr-2018 23:12:28.416 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["ajp-nio-8009"] 02-Apr-2018 23:12:28.417 INFO [main] org.apache.tomcat.util.net.NioSelectorPool.getSharedSelector Using a shared selector for servlet write/read 02-Apr-2018 23:12:28.432 INFO [main] org.apache.catalina.startup.Catalina.load Initialization processed in 1040 ms 02-Apr-2018 23:12:28.467 INFO [main] org.apache.catalina.core.StandardService.startInternal Starting service [Catalina] 02-Apr-2018 23:12:28.483 INFO [main] org.apache.catalina.core.StandardEngine.startInternal Starting Servlet Engine: Apache Tomcat/9.0.6 02-Apr-2018 23:12:28.499 INFO [main] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [/usr/local/tomcat/webapps/docs] 之前有报找不到APR的错误，后来根据教程安装了apr,apr-util,tomcat-native后那个错误消失了，但是启动tomcat还是异常（无法正常关闭，无法访问），每次只能通过杀进程的方法关闭。 求大神解答！

阿里云下 Tomcat 应用无法连接数Mysql据库_course

**1、程序没问题，在本机上调试无误，struts2 spting hibernate 2、在阿里云服务器上 配置了 JDK 1.7 + tomcat7 + mysql5.1 ， OS:ubuntu64 3、将应用部署后，JSP 页面访问正常，只要涉及到连接数据库就会有如下提示** 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.JDBCContext.connection(JDBCContext.java:142) org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:85) org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1354) com.bfy.action.LoginAction.execute(LoginAction.java:89) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 。。。。。。。。。。。。 **4、怀疑XML文件读取也有问题，去掉过滤器直接访问一些ACTION，提示没有对应的result 5、应用池内文件权限 均为 777 6、mysql数据库工作正常，应用 所使用的为root用户，不是权限问题**

Java Web项目部署在云服务器数据库查询结果为空，本地运行正常_course

我在本地写的Java web项目，在本地使用本机MySQL数据库一切正常， 但是部署在云服务器的Tomcat，使用云服务器的MySQL数据库查询数据库结果却是空的， 服务器的数据表中确实是有数据的，但就是查询不出来，但是可以执行插入操作。 在服务器的命令行界面登录MySQL是可以查询出数据的，但就是用浏览器访问网页查询结果为空 Java web项目 jsp + servlet + java bean + mysql 5.6 服务器操作系统Centos 6.5 64位 Tomcat 8.0 JDK 1.8 数据库操作的用户对该数据库具有所有的权限 百度没有找到相关的问题 求助，O(∩_∩)O谢谢

linux配置阿里云SSL证书，遇到：Invalid keystore format_course

org.apache.catalina.LifecycleException: Protocol handler initialization failed at org.apache.catalina.connector.Connector.initInternal(Connector.java:935) at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:136) at org.apache.catalina.core.StandardService.initInternal(StandardService.java:530) at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:136) at org.apache.catalina.core.StandardServer.initInternal(StandardServer.java:852) at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:136) at org.apache.catalina.startup.Catalina.load(Catalina.java:622) at org.apache.catalina.startup.Catalina.load(Catalina.java:645) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:497) at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:311) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:494) Caused by: java.lang.IllegalArgumentException: java.io.IOException: Invalid keystore format at org.apache.tomcat.util.net.AbstractJsseEndpoint.createSSLContext(AbstractJsseEndpoint.java:114) at org.apache.tomcat.util.net.AbstractJsseEndpoint.initialiseSsl(AbstractJsseEndpoint.java:85) at org.apache.tomcat.util.net.NioEndpoint.bind(NioEndpoint.java:216) at org.apache.tomcat.util.net.AbstractEndpoint.init(AbstractEndpoint.java:1039) at org.apache.coyote.AbstractProtocol.init(AbstractProtocol.java:540) at org.apache.coyote.http11.AbstractHttp11Protocol.init(AbstractHttp11Protocol.java:70) at org.apache.catalina.connector.Connector.initInternal(Connector.java:932) ... 13 more Caused by: java.io.IOException: Invalid keystore format at sun.security.provider.JavaKeyStore.engineLoad(JavaKeyStore.java:650) at sun.security.provider.JavaKeyStore$JKS.engineLoad(JavaKeyStore.java:55) at java.security.KeyStore.load(KeyStore.java:1445) at org.apache.tomcat.util.net.SSLUtilBase.getStore(SSLUtilBase.java:139) at org.apache.tomcat.util.net.SSLHostConfigCertificate.getCertificateKeystore(SSLHostConfigCertificate.java:204) at org.apache.tomcat.util.net.jsse.JSSEUtil.getKeyManagers(JSSEUtil.java:183) at org.apache.tomcat.util.net.AbstractJsseEndpoint.createSSLContext(AbstractJsseEndpoint.java:112) ... 19 more 这事报的异常。 而同样的配置在Windows上没有问题，而在linux配置就报异常。

Minecraft服务器开启报错-java.net.BindException: Cannot assign requested address: bind 排查不出问题?_course

每次开启mc服务器都会报错 经过排查我填入的端口没有被占用，防火墙已经将相关端口开放，在阿里云的防火墙设置也添加了相关规则 hosts文件内没有内容 jdk用的是jdk12 如果将server-ip改为内网ip或者127.0.0.1就可以正常开启，但是公网ip不可以 我在服务器上部署的tomcat和mysql都可以正常访问 如能解决，万分感谢！！！！！！ > **** FAILED TO BIND TO PORT! > The exception was: java.net.BindException: Cannot assign requested address: bind > Perhaps a server is already running on that port?

在本机运行正常的java web传到服务器上就出现空指针_course

在虚拟机上面搭的环境，jdk和tomcat都是同样的版本，运行出现了空指针 type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception java.lang.NullPointerException com.mr.webiter.BlogMainAction.BlogMain(BlogMainAction.java:38) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:597) com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:441) com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:280) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:243) com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:165) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:252) org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:122) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:179) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:235) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:89) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:130) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:126) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:138) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:165) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:179) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52) org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:488) org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:395) note The full stack trace of the root cause is available in the Apache Tomcat/6.0.29 logs.

阿里云 Java环境 每小时在根目录下生成 hs_err_pid*.log ，求教！_course

OS环境：阿里云 1核 1G内存； 安装软件：安装了 JDK 1.7 TOMCAT 7.X； 部署内容：部署了 java web 工程，工程正常运行； 问题：每小时在跟目录下生成一个 hs_err_pid<pid>.log 已经采取的措施： 1、配置服务器Swap 2、配置tomcat jvm 内存 （bin/catalina.sh） 未果，求牛人指点。 文件内容如下： # # There is insufficient memory for the Java Runtime Environment to continue. # pthread_getattr_np # Possible reasons: # The system is out of physical RAM or swap space # In 32 bit mode, the process size limit was hit # Possible solutions: # Reduce memory load on the system # Increase physical memory or swap space # Check if swap backing store is full # Use 64 bit Java on a 64 bit OS # Decrease Java heap size (-Xmx/-Xms) # Decrease number of Java threads # Decrease Java thread stack sizes (-Xss) # Set larger code cache with -XX:ReservedCodeCacheSize= # This output file may be truncated or incomplete. # # Out of Memory Error (os_linux_x86.cpp:718), pid=29229, tid=140505843455744 # # JRE version: Java(TM) SE Runtime Environment (7.0_67-b01) (build 1.7.0_67-b01) # Java VM: Java HotSpot(TM) 64-Bit Server VM (24.65-b04 mixed mode linux-amd64 compressed oops) # Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again # --------------- T H R E A D --------------- Current thread (0x00007fca0c08a800): JavaThread "Service Thread" daemon [_thread_new, id=29237, stack(0x0000000000000000,0x0000000000000000)] Stack: [0x0000000000000000,0x0000000000000000], sp=0x00007fca10e34880, free space=137212737746k Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code) V [libjvm.so+0x99eb8a] V [libjvm.so+0x49721b] V [libjvm.so+0x8237ca] V [libjvm.so+0x823815] V [libjvm.so+0x952614] V [libjvm.so+0x958dd4] V [libjvm.so+0x81f988] --------------- P R O C E S S --------------- Java Threads: ( => current thread ) =>0x00007fca0c08a800 JavaThread "Service Thread" daemon [_thread_new, id=29237, stack(0x0000000000000000,0x0000000000000000)] 0x00007fca0c088000 JavaThread "C2 CompilerThread1" daemon [_thread_blocked, id=29236, stack(0x00007fca10e36000,0x00007fca10f37000)] 0x00007fca0c085800 JavaThread "C2 CompilerThread0" daemon [_thread_blocked, id=29235, stack(0x00007fca10f37000,0x00007fca11038000)] 0x00007fca0c084000 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=29234, stack(0x00007fca11038000,0x00007fca11139000)] 0x00007fca0c064800 JavaThread "Finalizer" daemon [_thread_blocked, id=29233, stack(0x00007fca11139000,0x00007fca1123a000)] 0x00007fca0c062800 JavaThread "Reference Handler" daemon [_thread_blocked, id=29232, stack(0x00007fca1123a000,0x00007fca1133b000)] 0x00007fca0c008800 JavaThread "main" [_thread_in_vm, id=29230, stack(0x00007fca12195000,0x00007fca12296000)] Other Threads: 0x00007fca0c05e000 VMThread [stack: 0x00007fca1133b000,0x00007fca1143c000] [id=29231] VM state:not at safepoint (normal execution) VM Mutex/Monitor currently owned by a thread: ([mutex/lock_event]) [0x00007fca0c006bc0] PeriodicTask_lock - owner thread: 0x00007fca0c008800 Heap def new generation total 4800K, used 343K [0x00000000eb400000, 0x00000000eb930000, 0x00000000f0750000) eden space 4288K, 8% used [0x00000000eb400000, 0x00000000eb455e40, 0x00000000eb830000) from space 512K, 0% used [0x00000000eb830000, 0x00000000eb830000, 0x00000000eb8b0000) to space 512K, 0% used [0x00000000eb8b0000, 0x00000000eb8b0000, 0x00000000eb930000) tenured generation total 10624K, used 0K [0x00000000f0750000, 0x00000000f11b0000, 0x00000000fae00000) the space 10624K, 0% used [0x00000000f0750000, 0x00000000f0750000, 0x00000000f0750200, 0x00000000f11b0000) compacting perm gen total 21248K, used 2132K [0x00000000fae00000, 0x00000000fc2c0000, 0x0000000100000000) the space 21248K, 10% used [0x00000000fae00000, 0x00000000fb015148, 0x00000000fb015200, 0x00000000fc2c0000) No shared spaces configured. Card table byte_map: [0x00007fca117bd000,0x00007fca11864000] byte_map_base: 0x00007fca11063000 Polling page: 0x00007fca1332b000 Code Cache [0x00007fca09000000, 0x00007fca09270000, 0x00007fca0c000000) total_blobs=156 nmethods=0 adapters=126 free_code_cache=48779Kb largest_free_block=49950080 Compilation events (0 events): No events GC Heap History (0 events): No events Deoptimization events (0 events): No events Internal exceptions (1 events): Event: 0.027 Thread 0x00007fca0c008800 Threw 0x00000000eb410380 at /HUDSON/workspace/7u-2-build-linux-amd64/jdk7u67/1368/hotspot/src/share/vm/prims/jni.cpp:3991 Events (10 events): Event: 0.058 loading class 0x00007fca11701880 Event: 0.058 loading class 0x00007fca11701880 done Event: 0.058 loading class 0x00007fca1170df80 Event: 0.058 loading class 0x00007fca1170df80 done Event: 0.058 loading class 0x00007fca116c8ee0 Event: 0.058 loading class 0x00007fca116c8ee0 done Event: 0.058 Thread 0x00007fca0c084000 Thread added: 0x00007fca0c084000 Event: 0.058 Thread 0x00007fca0c085800 Thread added: 0x00007fca0c085800 Event: 0.059 Thread 0x00007fca0c088000 Thread added: 0x00007fca0c088000 Event: 0.059 Thread 0x00007fca0c08a800 Thread added: 0x00007fca0c08a800 .....

使用tomcat8写了个webSocket聊天室，出现如下异常_course

 如图，在本地运行无异常，上传至阿里云服务器后开始时无异常，等待一段时间（推测是session timeout后）出现如图异常 package com.project.webSocket; import java.io.IOException; import java.util.HashMap; import java.util.Map; import javax.servlet.http.HttpSession; import javax.websocket.EndpointConfig; import javax.websocket.OnClose; import javax.websocket.OnError; import javax.websocket.OnMessage; import javax.websocket.OnOpen; import javax.websocket.Session; import javax.websocket.server.ServerEndpoint; import org.json.JSONException; import org.json.JSONObject; import org.springframework.web.context.support.WebApplicationContextUtils; import com.project.service.Manager; import com.project.service.impl.ManagerImpl; import com.project.utils.GetHttpSessionConfigurator; //@ServerEndpoint注解表示将 WebSocket服务端运行在 以ws://开头的访问端点 @ServerEndpoint(value = "/SocketServer",configurator = GetHttpSessionConfigurator.class) public class SocketServer{ private static final long serialVersionUID = 1L; //将httpSession,socketSession放在一个map里，代表一个用户 private static final HashMap<HttpSession,SocketServer> onlineUsers = new HashMap<HttpSession,SocketServer>(); private static int onlineCount = 0; //定义客服人员的名字（对应cookie--user_id） private static String customerService1 = "A002"; private static String customerService2 = "A003"; private HttpSession httpSession; /** * WebSocket Session */ private Session session; //使用 ServerEndpoint 注释的类必须有一个公共的无参数构造函数 public SocketServer() { } /** * 打开连接 * * @param session */ @OnOpen public void onOpen(Session session,EndpointConfig config) { this.session = session; this.httpSession = (HttpSession)config.getUserProperties().get(HttpSession.class.getName()); httpSession.setMaxInactiveInterval(60000); if(httpSession.getAttribute("user") != null){ onlineUsers.put(httpSession, this); } addOnlineCount(); System.out.println("++++当前人数" + onlineUsers.size()); System.out.println(httpSession.getAttribute("user")); } /** * 关闭连接 */ @OnClose public void onClose() { onlineUsers.remove(httpSession,this);//从map中删除 subOnlineCount(); System.out.println("----当前人数" + onlineUsers.size()); } /** * 错误信息响应 * * @param throwable */ @OnError public void onError(Throwable throwable) { System.out.println("连接异常"); System.out.println(throwable.getMessage()); } 请问是什么问题造成的？

jvm每隔一个小时就会报错,打印hs_err_pid*.log_course

在阿里云服务器上安装jdk7+tomcat7环境,启动tomcat,不发布任何应用,jvm也会不停出错 每隔一个小时就生成一个hs_err_pid*.log 系统版本: Linux iZ23usxuuqdZ 2.6.32-431.23.3.el6.x86_64 #1 SMP Thu Jul 31 17:20:51 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux jdk版本 java version "1.7.0_79" Java(TM) SE Runtime Environment (build 1.7.0_79-b15) Java HotSpot(TM) 64-Bit Server VM (build 24.79-b02, mixed mode) hs_err_pid*.log内容如下: # # There is insufficient memory for the Java Runtime Environment to continue. # pthread_getattr_np # Possible reasons: # The system is out of physical RAM or swap space # In 32 bit mode, the process size limit was hit # Possible solutions: # Reduce memory load on the system # Increase physical memory or swap space # Check if swap backing store is full # Use 64 bit Java on a 64 bit OS # Decrease Java heap size (-Xmx/-Xms) # Decrease number of Java threads # Decrease Java thread stack sizes (-Xss) # Set larger code cache with -XX:ReservedCodeCacheSize= # This output file may be truncated or incomplete. # # Out of Memory Error (os_linux_x86.cpp:718), pid=19247, tid=140316616615680 # # JRE version: Java(TM) SE Runtime Environment (7.0_79-b15) (build 1.7.0_79-b15) # Java VM: Java HotSpot(TM) 64-Bit Server VM (24.79-b02 mixed mode linux-amd64 compressed oops) # Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again --------------- T H R E A D --------------- Current thread (0x00007f9e1808c800): JavaThread "Service Thread" daemon [_thread_new, id=19255, stack(0x0000000000000000,0x0000000000000000)] Stack: [0x0000000000000000,0x0000000000000000], sp=0x00007f9e0216d980, free space=137027945910k Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code) V [libjvm.so+0x9a32da] V [libjvm.so+0x497f7b] V [libjvm.so+0x825aea] V [libjvm.so+0x825b35] V [libjvm.so+0x955994] V [libjvm.so+0x95c154] V [libjvm.so+0x821ca8]        

有关于Linux服务器httpd进程造成CPU跑满问题_course

首先说明一下我的Linux服务器配置：JDK1.8+Tomcat8 使用了SSL证书来使用HTTPS协议，同时在同一个项目里也有一个微信小程序的部分接口，这些接口处于没有被调用的情况 部署的项目是典型的JavaWeb项目+SSH框架+MySQL数据库 事情的经过是这样的。 　　首先我准备更新我部署在阿里云上面的项目，发现无论是我使用命令终端还是阿里云自带的远程终端都提示密码错误，检查服务器状态，发现服务器CPU在15天以前(可能更久)就一直处在100%的跑满状态。由于无法进入终端，标准的服务器排查程序无法进行，使用了重启服务器的操作，重启之后发现阿里云自带的远程终端可以上了，但是显示内核错误信息,如下图。  到了这里服务器已经崩了，联系了阿里的工程师共同处理，挂载livecd进入服务器查看，服务器内的lib lib64目录缺失了，导致系统异常，从测试服务器中拷贝lib 和lib64目录到服务器内，启动正常。 到了这里，基本上看似圆满解决了，我想查找问题原因，进入日志查看也没有发现任何问题，倒是一直在报一个异常java.lang.IllegalArgumentException: Invalid character found in method name. HTTP method names must be tokens，查阅资料后，我在server.xml配置中加入了这个属性maxHttpHeaderSize="8192"，然后将更新后的项目部署上去，开启tomcat，然后关闭tomcat的时候，CPU监控突然飙升100%，即使已经确认tomcat已经关闭，使用top命令查看进程，发现了罪魁祸首:httpd进程。占了CPU100%，在强制性杀死httpd进程之后CPU才恢复正常。而且项目访问正常。 网上查了一下，这个进程是apache的，但是我是用的tomcat并没有使用apache。难道是因为同一个爸爸生的原因？ 所以，我的问题是：1.造成这个问题的原因是什么？2.是否是我的操作出现了错误？3.如何避免这个问题。 万谢！

ubuntu下面的apache2用JK模式整合tomcat后tomcat的Jsp显示404找不到_course

我是使用Jk的连接方式修改了几个文件 ## 1. /etc/libapache2-mod-jk/workers.properties下的文件 改了以下内容 ``` workers.tomcat_home=/root/tomcat8 workers.java_home=/usr/local/jdk8 ps=/ worker.list=ajp13_worker,jk-status,jk-manager worker.ajp13_worker.port=8009 worker.ajp13_worker.host=114.215.92.15 worker.ajp13_worker.type=ajp13 worker.ajp13_worker.lbfactor=1 worker.loadbalancer.type=lb worker.loadbalancer.balance_workers=ajp13_worker ``` **注 worker.ajp13_worker.host=114.215.92.15我使用过 127.0.0.1 和localhost 这个系统我是运行在阿里云服务其上面的 2./etc/apache2/apache2.conf ``` IncludeOptional conf-enabled/*.conf AddType application/x-httpd-php .php .htm .html IncludeOptional sites-enabled/*.conf ServerName 114.215.92.15 JkLogFile /var/log/apache2/mod_jk.log JkLogLevel info JkLogStampFormat "[%a %b %d %H:%M:%S %Y]" JkOptions +ForwardKeySize +ForwardURICompat -ForwardDirectories JkRequestLogFormat "%w %V %T" ``` **ServerName也是改过 127.0.0.1和localhost 还有 laijie.top** 3. ## /etc/apache2/sites-available/000-default.conf ``` JkMount /*.do ajp13_worker JkMount /*.jsp ajp13_worker ``` tomcat 没有配置文件没改过 8009端口也能用 打开项目[http://laijie.top/MS01/ ](http://laijie.top/MS01/ "") 显示目录  打开index.jsp 显示好像是tomcat报找不到 我反复重启服务器 关闭selinux reload restart tomcat 和 apache都不好使，希望大神指点一二谢谢

个人java项目发布时一个问题_course

小弟写将写好了项目生成war，然后把war传到服务器（阿里云的，已装好jdk tomcat，数据库也是同一台），然后出现了一个问题： localhost:8080 + 项目名 可以正常的访问（包括数据库的交互也没问题），使用127.0.0.1 或 外网ip+项目名访问时可以访问到静态页面，只要与数据库有交互的就会出现问题（无法连接到数据库） 这个是什么问题呢，小弟在网上查了好久，试了好多方法都不行

SSH项目在windows下正常启动，在Linux下启动失败_course

一个SSH项目，打包出来后放到windows服务器上可以正常启动和访问，但是放的Linux服务器上无法正常启动。 Spring版本4X JDK1.8 Tomcat8 windows和Linux均为阿里云的服务器。 以下是Linux中的报错信息： ``` 19:08:03.493 [localhost-startStop-1] ERROR org.apache.struts2.dispatcher.Dispatcher - Dispatcher initialization failed com.opensymphony.xwork2.config.ConfigurationException: Unable to load configuration. at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:69) ~[xwork-core-2.3.3.jar:2.3.3] at org.apache.struts2.dispatcher.Dispatcher.getContainer(Dispatcher.java:960) ~[struts2-core-2.5.13.jar:2.5.13] at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:466) ~[struts2-core-2.5.13.jar:2.5.13] at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:499) [struts2-core-2.5.13.jar:2.5.13] at org.apache.struts2.dispatcher.InitOperations.initDispatcher(InitOperations.java:75) [struts2-core-2.5.13.jar:2.5.13] at org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:63) [struts2-core-2.5.13.jar:2.5.13] at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:279) [catalina.jar:8.0.45] at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:260) [catalina.jar:8.0.45] at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:105) [catalina.jar:8.0.45] at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4700) [catalina.jar:8.0.45] at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5340) [catalina.jar:8.0.45] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145) [catalina.jar:8.0.45] at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:753) [catalina.jar:8.0.45] at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:729) [catalina.jar:8.0.45] at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717) [catalina.jar:8.0.45] at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:976) [catalina.jar:8.0.45] at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1853) [catalina.jar:8.0.45] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_222] at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_222] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_222] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_222] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_222] Caused by: com.opensymphony.xwork2.config.ConfigurationException: Unable to load bean: type:com.opensymphony.xwork2.TextProviderFactory class:com.opensymphony.xwork2.StrutsTextProviderFactory at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:235) ~[xwork-core-2.3.3.jar:2.3.3] at org.apache.struts2.config.StrutsXmlConfigurationProvider.register(StrutsXmlConfigurationProvider.java:98) ~[struts2-core-2.5.13.jar:2.5.13] at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:206) ~[xwork-core-2.3.3.jar:2.3.3] at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:66) ~[xwork-core-2.3.3.jar:2.3.3] ... 21 more Caused by: java.lang.IncompatibleClassChangeError: Implementing class at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_222] at java.lang.ClassLoader.defineClass(ClassLoader.java:763) ~[?:1.8.0_222] at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[?:1.8.0_222] at org.apache.catalina.loader.WebappClassLoaderBase.findClassInternal(WebappClassLoaderBase.java:2567) ~[catalina.jar:8.0.45] at org.apache.catalina.loader.WebappClassLoaderBase.findClass(WebappClassLoaderBase.java:859) ~[catalina.jar:8.0.45] at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1302) ~[catalina.jar:8.0.45] at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1167) ~[catalina.jar:8.0.45] at com.opensymphony.xwork2.util.ClassLoaderUtil.loadClass(ClassLoaderUtil.java:144) ~[xwork-core-2.3.3.jar:2.3.3] at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:206) ~[xwork-core-2.3.3.jar:2.3.3] at org.apache.struts2.config.StrutsXmlConfigurationProvider.register(StrutsXmlConfigurationProvider.java:98) ~[struts2-core-2.5.13.jar:2.5.13] at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:206) ~[xwork-core-2.3.3.jar:2.3.3] at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:66) ~[xwork-core-2.3.3.jar:2.3.3] ... 21 more ```