[error] ERROR: epmd error for ho

原始日志

Mar 30 21:44:54 dev.java110.com rabbitmq-server[5793]: 21:44:54.459 [error] ERROR: epmd error for host dev: address (cannot connect to host/port)
Mar 30 21:44:54 dev.java110.com rabbitmq-server[5793]: ERROR: epmd error for host dev: address (cannot connect to host/port)
Mar 30 21:44:54 dev.java110.com rabbitmq-server[5793]: 21:44:54.459 [error]
Mar 30 21:44:55 dev.java110.com rabbitmq-server[5793]: 21:44:55.460 [error] Supervisor rabbit_prelaunch_sup had child prelaunch started with rabbit_prelaunch
Mar 30 21:44:55 dev.java110.com rabbitmq-server[5793]: 21:44:55.460 [error] CRASH REPORT Process <0.143.0> with 0 neighbours exited with reason: {{shutdown,{
Mar 30 21:44:56 dev.java110.com rabbitmq-server[5793]: {"Kernel pid terminated",application_controller,"{application_start_failure,rabbitmq_prelaunch,{{shutd
Mar 30 21:44:56 dev.java110.com rabbitmq-server[5793]: Kernel pid terminated (application_controller) ({application_start_failure,rabbitmq_prelaunch,{{shutdo
Mar 30 21:44:57 dev.java110.com rabbitmq-server[5793]: Crash dump is being written to: erl_crash.dump...done
Mar 30 21:44:57 dev.java110.com systemd[1]: rabbitmq-server.service: main process exited, code=exited, status=1/FAILURE
Mar 30 21:44:57 dev.java110.com rabbitmqctl[5977]: Error: unable to perform an operation on node 'rabbit@dev'. Please see diagnostics information and suggest
Mar 30 21:44:57 dev.java110.com rabbitmqctl[5977]: Most common reasons for this are:
Mar 30 21:44:57 dev.java110.com rabbitmqctl[5977]: * Target node is unreachable (e.g. due to hostname resolution, TCP connection or firewall issues)
Mar 30 21:44:57 dev.java110.com rabbitmqctl[5977]: * CLI tool fails to authenticate with the server (e.g. due to CLI tool's Erlang cookie not matching that o
Mar 30 21:44:57 dev.java110.com rabbitmqctl[5977]: * Target node is not running
Mar 30 21:44:57 dev.java110.com rabbitmqctl[5977]: In addition to the diagnostics info below:
Mar 30 21:44:57 dev.java110.com rabbitmqctl[5977]: * See the CLI, clustering and networking guides on https://rabbitmq.com/documentation.html to learn more
Mar 30 21:44:57 dev.java110.com rabbitmqctl[5977]: * Consult server logs on node rabbit@dev
Mar 30 21:44:57 dev.java110.com rabbitmqctl[5977]: * If target node is configured to use long node names, don't forget to use --longnames with CLI tools
Mar 30 21:44:57 dev.java110.com rabbitmqctl[5977]: DIAGNOSTICS
Mar 30 21:44:57 dev.java110.com rabbitmqctl[5977]: ===========
Mar 30 21:44:57 dev.java110.com rabbitmqctl[5977]: attempted to contact: [rabbit@dev]
Mar 30 21:44:57 dev.java110.com rabbitmqctl[5977]: rabbit@dev:
Mar 30 21:44:57 dev.java110.com rabbitmqctl[5977]: * connected to epmd (port 4369) on dev
Mar 30 21:44:57 dev.java110.com rabbitmqctl[5977]: * epmd reports: node 'rabbit' not running at all
Mar 30 21:44:57 dev.java110.com rabbitmqctl[5977]: no other nodes on dev
Mar 30 21:44:57 dev.java110.com rabbitmqctl[5977]: * suggestion: start the node
Mar 30 21:44:57 dev.java110.com rabbitmqctl[5977]: Current node details:
Mar 30 21:44:57 dev.java110.com rabbitmqctl[5977]: * node name: 'rabbitmqcli-5977-rabbit@dev'
Mar 30 21:44:57 dev.java110.com rabbitmqctl[5977]: * effective user's home directory: /var/lib/rabbitmq
Mar 30 21:44:57 dev.java110.com rabbitmqctl[5977]: * Erlang cookie hash: KAdeue0Pp4g5hNm2ckjGZg==
Mar 30 21:44:57 dev.java110.com systemd[1]: Failed to start RabbitMQ broker.
-- Subject: Unit rabbitmq-server.service has failed

日志分析

核心点：[error] ERROR: epmd error for host dev: address (cannot connect to host/port)

分析：日志中明显表示是与host映射有关，根据提示信息为【dev】，故本机的主机名被设置为了dev，但是dev在hosts中又没有添加对应的映射；

解决方案：
1，修改本机的主机名为localhost;
2，在原始的hosts文件中添加dev的映射

[root@dev soft]# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4 dev
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6

问题扩展：每个人遇到的场景可能是不同的，但是要注意查看是否报错中给出的域名不是dev，而是rabbit，如果则对应的添加rabbit的hosts映射即可。