说明 本来是要先把Hystrix 仪表盘更完的,但是出现了Turbine.Dashboard.RabbitMQ整合实现监控. 所以先在学RabbitMq的基本操作,在安装过程中出现了 E:\RabbitMQ Server\rabbitmq_server-3.6.5\sbin>rabbitmqctl status Status of node 'rabbit@DESKTOP-T5RBR6M' ... Error: unable to connect to node 'rabbit@DESKTOP-…
摘要 当使用rabbitmqctl时出现Erlang distribution failed,把%SystemRoot%Windows\System32\config\systemprofile下的.erlang.cookie 复制到%SystemRoot%\Users\UsersName后重启RabbitMQ服务 前情概要 今天在使用RabbitMQ突然无法登陆Web Management,用rabbitmqctl的list_user命令查看用户时发现报了如下错误 attempted to c…
A TCP connection progresses through a series of states during its lifetime. The following diagram illustrates the possible states for a TCP connection and how the states transition based on various events from either the network or from the local TCP…
linux上TCP connection timeout的原因查找 好久没有写文章了, 今天解决了一个网络连接超时的问题, 记录以备查看. 最近在线上nginx经常出现输出connection timeout的日志,如下格式:2016/03/17 15:33:01 [error] 32356#0: *102974264722 no live upstreams while connecting to upstream, client: 123.151.42.*, server: localhos…
Three-Way Handshake The following scenario occurs when a TCP connection is established: The server must be prepared to accept an incoming connection. This is normally done by calling socket, bind, and listen and is called a passive open. The client i…
In HTTP/0.9 (not used anymore), each request uses a separate TCP connection, and the end of a response is signalled by closing the connection. In HTTP/1.0, an unofficial but very widely supported "Connection: Keep-Alive" request header can be us…
周五下午的时候升级了一个环境,跑了批处理sh升级脚本后,启动时报下列错误: INFO | jvm 1 | 2017/02/24 17:39:09 | java.io.IOException INFO | jvm 1 | 2017/02/24 17:39:09 | at com.rabbitmq.client.impl.AMQChannel.wrap(AMQChannel.java:106) INFO | jvm 1 | 2017/02/24 17:39:09 | at com.rabbitmq.…
三次握手与四次挥手的原因 https://yq.aliyun.com/articles/7435?spm=5176.8091938.0.0.N4v33a linux里的backlog详解 tcp connection setup的实现(一) linux内核中tcp连接的断开处理 tcp connection setup的实现(二) 关于tcp_v4_do_rcv()中对TCP_LISTEN状态处理的疑问 网络编程常用接口的内核实现----sys_listen() http://veithen.g…
在Eclipse 调试 springside showcase项目中,tomcat报异常 Exception in thread "RMI TCP Connection(idle)" java.lang.OutOfMemoryError: PermGen space 在google半天后,找到解决方法: Tomcat直接运行 Catalina.sh/Catalina.bat 设置: windows: set JAVA_OPTS="-Xms1024m -Xmx10246m -X…
w防止网络过载和拥塞 HTTP The Definitive Guide The performance of TCP data transfer also depends on the age of the TCP connection. TCP connections "tune" themselves over time, initially limiting the maximum speed of the connection and increasing the speed…
4个值唯一地定义一条TCP连接. HTTP The Definitive Guide A computer might have several TCP connections open at any one time. TCP keeps all these connections straight through port numbers. Port numbers are like employees' phone extensions. Just as a company's main…
严重 [RMI TCP Connection(2)-127.0.0.1] org.apache.catalina.core.ContainerBase.addChildInternal ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardCo…
学习Servlet时碰到的一个bug. Connected to server [2017-01-08 04:40:33,100] Artifact jspRun:war exploded: Artifact is being deployed, please wait... 08-Jan-2017 16:40:33.570 严重 [RMI TCP Connection(3)-127.0.0.1] org.apache.catalina.core.ContainerBase.addChildIn…
运行报错 ERROR [RMI TCP Connection(3)-127.0.0.1] - init datasource error, url: jdbc:mysql://localhost:3366/sm?useUnicode=true&characterEncoding=utf8 com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure Last packet sent to…
异常1 org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'rabbitMQSender': Unsatisfied dependency expressed through field 'admin'; nested exception is org.springframework.beans.factory.BeanCreationException:…
今日在重新部署项目时出现此问题,虽然对项目无影响,但问题就是问题.完整信息如下(使用idea工具): 十二月 05, 2015 11:44:27 上午 org.apache.catalina.startup.HostConfig undeploy 信息: Undeploying context []2015-12-05 11:44:27 JRebel: Reloading class 'com.shyy.web.controller.anntation.UserController'.2015-…
-------------------------------------------------------------------------------------------------------------开始安装------------------------------------------------------------------------------------------------------ 安装需要的软件包, yum-util 提供yum-config-ma…
遇到问题描述: 运行android程序控制台输出 [2013-06-25 11:10:32 - MyWellnessTracker] The connection to adb is down, and a severe error has occured. [2013-06-25 11:10:32 - MyWellnessTracker] You must restart adb and Eclipse. [2013-06-25 11:10:32 - MyWellnessTracker] Pl…
CLOSE is an operation meaning "I have no more data to send." The notion of closing a full-duplex connection is subject to ambiguous interpretation, of course, since it may not be obvious how to treat the receiving side of the connection. We have…
windows安装RabbitMQ时在安装完Erlang语言开发包后,再安装RabbitMQ时报错: Your installed version of Erlang (6.2) is too old. Please install a more recent version. 解决: 下载最新的Erlang安装包,http://www.erlang.org/downloads ,重新安装即可…
参考资料:http://erlangcentral.org/wiki/index.php/Building_a_Non-blocking_TCP_server_using_OTP_principles 服务器设计tcp_server_app下的根监控树使用one_for_one重启策略.两个子树应用,第一个是一个tcp套接字监听服务器,使用gen_server模式来实现,采用异步监听的客户端连接的模式.第二个是一个客户端应用,使用gen_fsm模式实现,使用标准SASL错误报告接口,记录客户端消…
在最近的求职面试过程中,关于"建立TCP连接的三次握手"不止一次被问到了,虽然我以前用同样的问题面试过别人,但感觉还是不能给面试官一个很清晰的回答.本文算是对整个TCP连接管理做一个比较系统的梳理. 1. TCP报文段结构(TCP Segment Structure)(i.e. TCP Header) source port: 源端口,占16位. dest port: 目标端口,占16位. sequence number: 序列号,占32位.该字段指定了TCP分组在数据流中的位置,在数…
https://blog.netherlabs.nl/articles/2009/01/18/the-ultimate-so_linger-page-or-why-is-my-tcp-not-reliable http://stackoverflow.com/questions/8874021/close-socket-directly-after-send-unsafe 发送端代码 sock = socket(AF_INET, SOCK_STREAM, 0); connect(sock, &r…
请检查Kafka的config/server.properties 看看是否有填写 listeners=PLAINTEXT://kafka-host:9092 advertised.listeners=PLAINTEXT://kafka-host:9092 这里的kafka-host需要在/etc/hosts进行映射,服务端映射到本地或内网ip,客户端映射到服务端ip 问题解决.…
1.访问http://localhost:15672/#/,输入用户名.密码登录报错500 解决方法:在快捷程序处找到RabbitMQ Service -stop停止服务,然后再点击RabbitMQ Service - start开启服务,重新登录即可.…
http://stackoverflow.com/questions/7250983/httpwebrequests-timeout-and-readwritetimeout-what-do-these-mean-for-the-unde https://support.microsoft.com/en-us/kb/904262 https://msdn.microsoft.com/library/e1ax3cw0.aspx?f=255&MSPPError=-2147217396 https:/…
1.输入的机器的 IP:15672进入Raabitmq的登陆管理界面 点击admin,进去点击set permission ok, 在运行应该就不会包这个错了…
问题描述:MQTT.js提供了连接MQTT的一套javascipt的方法,可供前端连接到MQTT服务器,也可以作为脚本测试.以脚本形式,用nodejs运行,是没有问题的,能够正常连接并且发送报文.但是如果把js代码放到HTML文件中,就不能正常完成连接,提示:客户端提示: 服务器提示: 问题解决:根据客户端提示,是无法完成握手连接,根据服务器提示,是因为解包的时候,包不符合格式,导致了连接拒绝.通过查阅文献,发现普通的socket和websocket是不一样的.直接运行脚本使用的是socket.…
安装了debian 8.5 就出问题了. root@debian8:~# lsb_release -aNo LSB modules are available.Distributor ID: DebianDescription: Debian GNU/Linux 8.5 (jessie)Release: 8.5Codename: jessieroot@debian8:~# uname -aLinux debian8 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt2…
1.首先看能否ping通服务器 2.telnet xx 9502之后能不能连通 3.如果连不通有可能是防火墙的问题 可以试试清空防火墙规则,或者关闭防火墙 iptables -F…