emqtt常見故障診斷及解決方案

 

EMQ 2.0 (Erlang/Enterprise/Elastic MQTT Broker) 是基于 Erlang/OTP 語言平臺開發，支持大規模連接和分布式集群，發布訂閱模式的開源 MQTT 消息服務器。在使用emqtt的過程中，大家會遇到這樣那樣的問題，在此就常見錯誤做個解析與總結。 

 一、emqtt未啟動

有時會碰到服務器停電的情況，而emqtt服務未開啟自動啟動

解決方案：

在安裝emqtt的服務器上添加emqtt服務開機自啟。

cd emqttd && ./bin/emqttd console

顯示：starting emqttd on node 'emqttd@127.0.0.1'

emqttd ctl is starting...[ok]

emqttd hook is starting...[ok]

emqttd router is starting...[ok]

emqttd pubsub is starting...[ok]

emqttd stats is starting...[ok]

emqttd metrics is starting...[ok]

emqttd pooler is starting...[ok]

emqttd trace is starting...[ok]

emqttd client manager is starting...[ok]

emqttd session manager is starting...[ok]

emqttd session supervisor is starting...[ok]

emqttd wsclient supervisor is starting...[ok]

emqttd broker is starting...[ok]

emqttd alarm is starting...[ok]

emqttd mod supervisor is starting...[ok]

emqttd bridge supervisor is starting...[ok]

emqttd access control is starting...[ok]

說明成功;

./bin/emqttd start

emqttd 2.3.8 is started successfully!

說明啟動成功

 

二、emqtt負載過大
 解決方案：

 增加服務器數量，采用分布式部署方式解決此問題。