Tomcat

What's the recommended way to set networkaddress.cache.ttl in Elastic Beanstalk?

由 你说的曾经没有我的故事 提交于 2021-02-10 04:52:26
问题 I need to set Java's DNS cache TTL (networkaddress.cache.ttl) for an Amazon Elastic Beanstalk app running in Tomcat 8. Because EB can start and stop server instances at any time, I can't simply edit a Tomcat config file and the server and expect the change to persist. I tried setting the networkaddress.cache.ttl and sun.net.inetaddr.ttl environment variables, but those had no effect. Amazon says calling java.security.Security.setProperty("networkaddress.cache.ttl" , "60"); "will not work if

Jvm crash :fatal error has been detected by the Java Runtime Environment

由 前提是你 提交于 2021-02-10 04:34:15
问题 I had a tomcat crash on live server , which generated hs_err_pid file .In this there is a Problematic frame -> _wordcopy_fwd_dest_aligned+0x54. I searched in all similar cases of jvm crash but couldn't find whats the meaning of this problematic frame.Any suggestions ? # # A fatal error has been detected by the Java Runtime Environment: # # SIGBUS (0x7) at pc=0x00007f61087e3cb4, pid=18886, tid=140051814115072 # # JRE version: 6.0_37-b06 # Java VM: Java HotSpot(TM) 64-Bit Server VM (20.12-b01

Jvm crash :fatal error has been detected by the Java Runtime Environment

由 风格不统一 提交于 2021-02-10 04:33:59
问题 I had a tomcat crash on live server , which generated hs_err_pid file .In this there is a Problematic frame -> _wordcopy_fwd_dest_aligned+0x54. I searched in all similar cases of jvm crash but couldn't find whats the meaning of this problematic frame.Any suggestions ? # # A fatal error has been detected by the Java Runtime Environment: # # SIGBUS (0x7) at pc=0x00007f61087e3cb4, pid=18886, tid=140051814115072 # # JRE version: 6.0_37-b06 # Java VM: Java HotSpot(TM) 64-Bit Server VM (20.12-b01

Jvm crash :fatal error has been detected by the Java Runtime Environment

由 隐身守侯 提交于 2021-02-10 04:32:11
问题 I had a tomcat crash on live server , which generated hs_err_pid file .In this there is a Problematic frame -> _wordcopy_fwd_dest_aligned+0x54. I searched in all similar cases of jvm crash but couldn't find whats the meaning of this problematic frame.Any suggestions ? # # A fatal error has been detected by the Java Runtime Environment: # # SIGBUS (0x7) at pc=0x00007f61087e3cb4, pid=18886, tid=140051814115072 # # JRE version: 6.0_37-b06 # Java VM: Java HotSpot(TM) 64-Bit Server VM (20.12-b01

tomcat websocket servlet listening port

由 こ雲淡風輕ζ 提交于 2021-02-09 20:45:00
问题 I'm trying to write a servlet that uses org.apache.catalina.websocket.WebSocketServlet . I've found an example of websocket chat, but I can't figure out how can I specify the listening port for a websocket server (which is implemented in this servlet)? For example I need to listen for clients connection on port 11337 . But how I can express this? OK, here is the (simplified) code: public class TestServlet extends WebSocketServlet { private static final Logger logger = LoggerFactory.getLogger

tomcat websocket servlet listening port

由 妖精的绣舞 提交于 2021-02-09 20:43:37
问题 I'm trying to write a servlet that uses org.apache.catalina.websocket.WebSocketServlet . I've found an example of websocket chat, but I can't figure out how can I specify the listening port for a websocket server (which is implemented in this servlet)? For example I need to listen for clients connection on port 11337 . But how I can express this? OK, here is the (simplified) code: public class TestServlet extends WebSocketServlet { private static final Logger logger = LoggerFactory.getLogger

tomcat websocket servlet listening port

由 泪湿孤枕 提交于 2021-02-09 20:43:08
问题 I'm trying to write a servlet that uses org.apache.catalina.websocket.WebSocketServlet . I've found an example of websocket chat, but I can't figure out how can I specify the listening port for a websocket server (which is implemented in this servlet)? For example I need to listen for clients connection on port 11337 . But how I can express this? OK, here is the (simplified) code: public class TestServlet extends WebSocketServlet { private static final Logger logger = LoggerFactory.getLogger

Springboot 热部署的两种方式

由 流过昼夜 提交于 2021-02-09 19:03:11
https://yiqiwuliao.com/post/spring/springbootre-bu-shu#toc_3 记得修改下面参数 1. build project auto..... 2. shift + alt + ctrl + / -> regis.... 3. 使用下面命令debug运行 mvn spring-boot:run -Drun.jvmArguments= " -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=5005 " run -> Edit Configura.... -> remote 拓展：基于Tomcat的远程debug vim bin/catalina.sh 在第一行添加 CATALINA_OPTS="-server -Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=8899" 使用IDEA 创建一个remote 填写ip和端口链接即可进行远程debug 来源： oschina 链接： https://my.oschina.net/u/4315677/blog/3787656

带你认识互联网架构的演变过程

由 六眼飞鱼酱① 提交于 2021-02-09 13:53:04
单体架构（all in one） 所有模块都在一起，技术也不分层。 在单机上部署所有的应用程序和软件。 所有的代码都写在JSP里面，所有代码都写在一起，这种方式称为all in one。 特点： 1.不具备代码的可维护性。 2.容错性差。（容错性是指软件检测应用程序所运行的软件和硬件中发生的错误并从错误中恢复的能力，可以从系统的可靠性，可用性，可测性等几个方面衡量） 因为所有代码都写在JSP页面里，当因为用户或某些原因发生异常时：用户可以直接看到异常错误信息；异常会导致服务器宕机。 单体地狱： 只需一个应用，将所有功能部署在一起，以减少部署节点和成本。 解决方案 1.分层开发：解决单体架构容错性差的问题，同时提高了代码的维护性。 2.MVC架构（Web应用程序的设计模式） 3.服务器的部署分离。 特点： 1.MVC分层开发：解决容错性问题。 2.数据库和项目部署分离。 <font color=red>问题</font>： 1.高并发：随着用户访问量的持续增加，单台服务器无法满足用户访问需求。 解决方案： 1.集群 集群操作可能遇到的问题 高可用 高可用HA（High Availability）是分布式系统架构设计中必须考虑的因素之一，它通常是指，通过设计减少系统不能提供服务的时间。假设系统一直能够提供服务，我们说系统的可用性是100%。 如何保证高可用：避免单点。 高并发 高并发

eclipse创建spring boot项目，tomcat启动成功，但http://localhost:8080无法访问报错404解决方案

由 我与影子孤独终老i 提交于 2021-02-09 13:48:04
eclipse创建spring boot项目，tomcat启动成功，但http://localhost:8080无法访问报错404解决方案 参考文章： （1）eclipse创建spring boot项目，tomcat启动成功，但http://localhost:8080无法访问报错404解决方案 （2）https://www.cnblogs.com/shifu8005/p/9862230.html 备忘一下。 来源： oschina 链接： https://my.oschina.net/u/4428122/blog/4951473
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