ERROR: epmd error for host prd-can3-0-mq01: timeout (timed out) 问题解决 经过一番检查,其实RabbitMQ报这个错的原因是无法在/etc
Erlang makes use of a Port Mapper Daemon (epmd) for resolution of node names in a cluster. The default epmd port is 4369, but this can be changed using the ERL_EPMD_PORT environment variable. For further details see the Erlang epmd manpage. Once a distributed Erlang node address has been resolved via epmd, other nodes will attempt to communicate
nodedown DIAGNOSTICS =========== attempted to contact: [rabbit@h102] rabbit@h102: * connected to epmd (port 4369) on h102 * epmd reports: node 'rabbit' not running at all no other nodes
nodedown DIAGNOSTICS =========== attempted to contact: [rabbit@h101] rabbit@h101: * connected to epmd (port 4369) on h101 * epmd reports: node 'rabbit' not running at all no other nodes S 14:14 0:00 /usr/lib64/erlang/erts-5.8.5/bin/epmd -daemon rabbitmq 2975 22.7 0.8 1088040 33292 S 14:14 0:00 /usr/lib64/erlang/erts-5.8.5/bin/epmd -daemon rabbitmq 2975 8.6 0.8 1088040 33292
DIAGNOSTICS =========== attempted to contact: ['rabbit@LI-2-PC'] rabbit@LI-2-PC: * connected to epmd (port 4369) on LI-2-PC * epmd reports: node 'rabbit' not running at all no other
nodedown DIAGNOSTICS =========== attempted to contact: [rabbit@h102] rabbit@h102: * connected to epmd (port 4369) on h102 * epmd reports: node 'rabbit' not running at all no other nodes
要想在你本地远程连接生产环境的 node,你需要知道其在 epmd 下注册的端口。 这样的需求我一般都用 ssh port forwarding 来完成: PORT_PROD=$(shell ssh prod-cms-service "epmd -names" | grep cms_service epmd -names 显示本机在 epmd 注册的服务的端口号。为了找到生产环境下当前运行的服务的端口号,我们需要 ssh 上去运行这条命令。 服务在 epmd 注册的端口是动态的,不像 epmd 自身的端口 4369 是固定(或者可配置)的 ,因此你无法为防火墙单独开放这个端口。
第三部分:Erlang Port Mapper Daemon(epmd)端口(4369) Erlang Port Mapper Daemon(epmd)是Erlang编程语言中的一个重要组件,用于节点之间的通信 下面是有关epmd和其监听的端口4369的信息: epmd的作用,用于节点之间的通信: epmd(Erlang Port Mapper Daemon)是一个独立的守护进程,它在Erlang分布式系统中扮演着关键的角色 当Erlang节点启动时,它需要在分布式系统中找到其他节点以便进行通信,epmd负责维护这些节点的注册信息。 每个节点在启动时会向epmd注册,以及在需要与其他节点通信时,它会查询epmd获取目标节点的端口信息,从而建立通信连接。 总之,epmd是Erlang分布式系统中的重要组件,负责节点之间的服务发现和端口分配,从而支持分布式通信。
nodedown DIAGNOSTICS =========== attempted to contact: [rabbit@h102] rabbit@h102: * connected to epmd (port 4369) on h102 * epmd reports: node 'rabbit' not running at all no other nodes
DIAGNOSTICS =========== attempted to contact: [rabbit@wangshuo] rabbit@wangshuo: * connected to epmd (port 4369) on wangshuo * epmd reports: node 'rabbit' not running at all no other
12930/beam.smp tcp 0 0 0.0.0.0:4369 0.0.0.0:* LISTEN 10851/epmd 1039/mysqld tcp6 0 0 :::4369 :::* LISTEN 10851/epmd 0 ::1:323 :::* 695/chronyd rabbitmq启动端口号解析 4369 (epmd ), 25672 (Erlang distribution) Epmd 是 Erlang Port Mapper Daemon 的缩写,在 Erlang 集群中相当于 dns 的作用,绑定在4369端口上
nodedown DIAGNOSTICS =========== attempted to contact: [rabbit@rnode1] rabbit@rnode1: * connected to epmd (port 4369) on rnode1 * epmd reports: node 'rabbit' not running at all no other
DIAGNOSTICS =========== attempted to contact: [rabbit@rabbitmq3] rabbit@rabbitmq3: * connected to epmd (port 4369) on rabbitmq3 * epmd reports node 'rabbit' running on port 25672 * TCP connection succeeded 00:00:00 /usr/lib64/erlang/erts-5.10.4/bin/epmd -daemon rabbitmq 1480 1408 0 01:16 ?
nodedown DIAGNOSTICS =========== attempted to contact: [rabbit@s146] rabbit@s146: * connected to epmd (port 4369) on s146 * epmd reports node 'rabbit' running on port 25672 * TCP connection succeeded
. ├─2634 /usr/lib64/erlang/erts-8.0.3/bin/epmd -daemon ├─2750 erl_child_setup 1024 Program name tcp 0 0 0.0.0.0:4369 0.0.0.0:* LISTEN 3779/epmd mysqld tcp6 0 0 :::4369 :::* LISTEN 3779/epmd beam.smp tcp 0 0 0.0.0.0:4369 0.0.0.0:* LISTEN 3779/epmd mysqld tcp6 0 0 :::4369 :::* LISTEN 3779/epmd
======== attempted to contact: ['rabbit@DESKTOP-xxxxxx'] rabbit@DESKTOP-xxxxxxxx: * connected to epmd (port 4369) on DESKTOP-xxxxxxx * epmd reports node 'rabbit' uses port 25672 for inter-node and CLI
SpringCloud知识盲区整理 Mybatis中的jdbcType的作用 RestTemplate 操作 @LoadBalanced的作用和理解 RabbitMQ报错: unable to connect to epmd Spring的RestTemplate的使用 @LoadBalanced的作用和理解 RestTemplate与@LoadBalanced RabbitMQ报错: unable to connect to epmd
beam.smp tcp6 0 0 :::4369 :::* LISTEN 10150/epmd netstat -lntp tcp 0 0 0.0.0.0:4369 0.0.0.0:* LISTEN 10150/epmd beam.smp tcp6 0 0 :::4369 :::* LISTEN 10150/epmd redis01 DIAGNOSTICS =========== attempted to contact: [rabbit@host1] rabbit@host1: * connected to epmd (port 4369) on host1 * epmd reports node 'rabbit' uses port 25672 for inter-node and CLI tool traffic
rabbit@haha DIAGNOSTICS =========== attempted to contact: [rabbit@haha] rabbit@haha: * connected to epmd (port 4369) on haha * epmd reports node 'rabbit' uses port 25672 for inter-node and CLI tool traffic rabbit@haha DIAGNOSTICS =========== attempted to contact: [rabbit@haha] rabbit@haha: * connected to epmd (port 4369) on haha * epmd reports: node 'rabbit' not running at all no other nodes
/nginx: master tcp 0 0 0.0.0.0:4369 0.0.0.0:* LISTEN 4122/epmd /nginx: master tcp6 0 0 :::4369 :::* LISTEN 4122/epmd -lntup|grep 22 tcp 0 0 0.0.0.0:4369 0.0.0.0:* LISTEN 4122/epmd 770/sshd tcp6 0 0 :::4369 :::* LISTEN 4122/epmd