安装完成之后问题描述：
1、打开http://ip:15672/#/ 后台管理页面会很慢
2、springboot项目连接mq经常连接不上（偶尔可以连上）
3、报错：AmqpTimeoutException: java.util.concurrent.TimeoutException
4、java.net.SocketException: socket closed
5、An unexpected connection driver error occured
上面问题，网上很多资料都是设置用户权限和允许远程远程访问的方法：
设置用户权限
rabbitmqctl set_permissions -p /${user_name} user_admin '.*' '.*' '.*'允许远程访问，rabbitmq.config配置文件
[{rabbit, [{loopback_users, []}]}].如果上诉方法不能解决的可以尝试下面的方法：
1、运行如下命令查看状态：
rabbitmqctl status
错误时会出现如下信息：
Status of node rabbit@manage01 ...
Error: unable to perform an operation on node 'rabbit@manage01'. Please see diagnostics information and suggestions below.
Most common reasons for this are:
* Target node is unreachable (e.g. due to hostname resolution, TCP connection or firewall issues)
* CLI tool fails to authenticate with the server (e.g. due to CLI tool's Erlang cookie not matching that of the server)
* Target node is not running
In addition to the diagnostics info below:
* See the CLI, clustering and networking guides on http://rabbitmq.com/documentation.html to learn more
* Consult server logs on node rabbit@manage01
* If target node is configured to use long node names, don't forget to use --longnames with CLI tools
DIAGNOSTICS
===========
attempted to contact: [rabbit@manage01]
rabbit@manage01:
* connected to epmd (port 4369) on manage01
* epmd reports node 'rabbit' uses port 25672 for inter-node and CLI tool traffic
* can't establish TCP connection to the target node, reason: timeout (timed out)
* suggestion: check if host 'manage01' resolves, is reachable and ports 25672, 4369 are not blocked by firewall
Current node details:
* node name: 'rabbitmqcli-27020-rabbit@manage01'
* effective user's home directory: /var/lib/rabbitmq
* Erlang cookie hash: cuIV6fAR5pI2DAISuXW4IQ==
正确时会出现如下信息：
Status of node rabbit@manage01 ...
[{pid,28714},
{running_applications,
[{rabbitmq_web_mqtt,"RabbitMQ MQTT-over-WebSockets adapter","3.7.12"},
{rabbitmq_mqtt,"RabbitMQ MQTT Adapter","3.7.12"},
{rabbitmq_management,"RabbitMQ Management Console","3.7.12"},
{rabbitmq_management_agent,"RabbitMQ Management Agent","3.7.12"},
{rabbitmq_web_stomp,"Rabbit WEB-STOMP - WebSockets to Stomp adapter",
"3.7.12"},
{rabbitmq_stomp,"RabbitMQ STOMP plugin","3.7.12"},
{rabbitmq_web_dispatch,"RabbitMQ Web Dispatcher","3.7.12"},
{rabbit,"RabbitMQ","3.7.12"},
{amqp_client,"RabbitMQ AMQP Client","3.7.12"},
{rabbit_common,
"Modules shared by rabbitmq-server and rabbitmq-erlang-client",
"3.7.12"},
{jsx,"a streaming, evented json parsing toolkit","2.9.0"},
{xmerl,"XML parser","1.3.19"},
{os_mon,"CPO CXC 138 46","2.4.7"},
{cowboy,"Small, fast, modern HTTP server.","2.6.1"},
{ranch,"Socket acceptor pool for TCP protocols.","1.7.1"},
{ssl,"Erlang/OTP SSL application","9.1.2"},
{public_key,"Public key infrastructure","1.6.4"},
{asn1,"The Erlang ASN1 compiler version 5.0.8","5.0.8"},
{cowlib,"Support library for manipulating Web protocols.","2.7.0"},
{crypto,"CRYPTO","4.4"},
{inets,"INETS CXC 138 49","7.0.5"},
{sysmon_handler,"Rate-limiting system_monitor event handler","1.1.0"},
{mnesia,"MNESIA CXC 138 12","4.15.5"},
{recon,"Diagnostic tools for production use","2.3.6"},
{lager,"Erlang logging framework","3.6.5"},
{goldrush,"Erlang event stream processor","0.1.9"},
{compiler,"ERTS CXC 138 10","7.3.1"},
{syntax_tools,"Syntax tools","2.1.6"},
{sasl,"SASL CXC 138 11","3.3"},
{stdlib,"ERTS CXC 138 10","3.7.1"},
{kernel,"ERTS CXC 138 10","6.2"}]},
{os,{unix,linux}},
{erlang_version,
"Erlang/OTP 21 [erts-10.2.4] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:128] [hipe]\n"},
{memory,
[{connection_readers,0},
{connection_writers,0},
{connection_channels,0},
{connection_other,16596},
{queue_procs,0},
{queue_slave_procs,0},
{plugins,972316},
{other_proc,31715356},
{metrics,206948},
{mgmt_db,161864},
{mnesia,74376},
{other_ets,2853712},
{binary,94816},
{msg_index,28784},
{code,23713613},
{atom,1172689},
{other_system,14120482},
{allocated_unused,15029600},
{reserved_unallocated,0},
{strategy,rss},
{total,[{erlang,75131552},{rss,78036992},{allocated,90161152}]}]},
{alarms,[]},
{listeners,
[{clustering,25672,"::"},
{amqp,5672,"::"},
{stomp,61613,"::"},
{'http/web-stomp',15674,"::"},
{http,15672,"::"},
{mqtt,1883,"::"},
{'http/web-mqtt',15675,"::"}]},
{vm_memory_calculation_strategy,rss},
{vm_memory_high_watermark,0.4},
{vm_memory_limit,13390166425},
{disk_free_limit,50000000},
{disk_free,22576242688},
{file_descriptors,
[{total_limit,32668},
{total_used,2},
{sockets_limit,29399},
{sockets_used,0}]},
{processes,[{limit,1048576},{used,463}]},
{run_queue,1},
{uptime,26},
{kernel,{net_ticktime,60}}]
我们只需要关注第一句话：
Status of node rabbit@manage01 ...
可以知道rabbitmq中的host是manage01，然后运行如下命令添加host配置即可：
echo 127.0.0.1 manage01 >> /etc/host
PS：127.0.0.1可以是你的IP具体地址，如果是局域网服务器，可以直接写内网地址。