问题解决：检查帖子底部
我无法连接到 websocket。端口 1883 工作正常。这是 MQTT.fx 的输出：
2017-01-21 07:46:26,293 INFO --- BrokerConnectorController : onConnect
2017-01-21 07:46:26,294 INFO --- ScriptsController : Clear console.
2017-01-21 07:46:26,295 INFO --- MqttFX ClientModel : MqttClient with ID MQTT_FX_Client_Websocket assigned.
2017-01-21 07:46:36,314 ERROR --- MqttFX ClientModel : Error when connecting
org.eclipse.paho.client.mqttv3.MqttException: Connection lost
at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:146) ~[org.eclipse.paho.client.mqttv3-1.1.0.jar:?]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_112]
Caused by: java.io.EOFException
at java.io.DataInputStream.readByte(Unknown Source) ~[?:1.8.0_112]
at org.eclipse.paho.client.mqttv3.internal.wire.MqttInputStream.readMqttWireMessage(MqttInputStream.java:65) ~[org.eclipse.paho.client.mqttv3-1.1.0.jar:?]
at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:107) ~[org.eclipse.paho.client.mqttv3-1.1.0.jar:?]
... 1 more
2017-01-21 07:46:36,315 ERROR --- MqttFX ClientModel:Please verify your Settings (e.g. Broker Address, Broker Port & Client ID) and the user credentials!
org.eclipse.paho.client.mqttv3.MqttException: Connection lost
at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:146) ~[org.eclipse.paho.client.mqttv3-1.1.0.jar:?]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_112]
Caused by: java.io.EOFException
at java.io.DataInputStream.readByte(Unknown Source) ~[?:1.8.0_112]
at org.eclipse.paho.client.mqttv3.internal.wire.MqttInputStream.readMqttWireMessage(MqttInputStream.java:65) ~[org.eclipse.paho.client.mqttv3-1.1.0.jar:?]
at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:107) ~[org.eclipse.paho.client.mqttv3-1.1.0.jar:?]
... 1 more
2017-01-21 07:46:36,321 INFO --- ScriptsController : Clear console.
2017-01-21 07:46:36,322 ERROR --- BrokerConnectService : Connection lost
我对服务器和端口进行了 Telnet 测试，得到一个空白终端。我想这意味着有一个连接，因为否则我会有一个“连接失败”。消息日志插件不显示任何内容，日志文件中也没有任何内容。
它的 Debian 和 HiveMQ 3.2.2。
JAVA_OPTS: -Djava.net.preferIPv4Stack=true -XX:-UseSplitVerifier -noverify -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/opt/hivemq/heap-dump.hprof
-------------------------------------------------------------------------
2017-01-21 07:37:02,159 INFO - Starting HiveMQ Server
2017-01-21 07:37:02,176 INFO - HiveMQ version: 3.2.2
2017-01-21 07:37:02,178 INFO - HiveMQ home directory: /opt/hivemq
2017-01-21 07:37:02,226 INFO - Log Configuration was overridden by /opt/hivemq/conf/logback.xml
2017-01-21 07:37:12,013 INFO - Loaded Plugin HiveMQ JMX Metrics Reporting Plugin - v3.0.0
2017-01-21 07:37:12,014 INFO - Loaded Plugin HiveMQ MQTT Message Log Plugin - v3.0.0
2017-01-21 07:37:12,014 INFO - Loaded Plugin HiveMQ Sys Topic Plugin - v3.0.0
2017-01-21 07:37:12,014 INFO - Loaded Plugin HiveMQ JVM Metrics Plugin - v3.1.0
2017-01-21 07:37:12,038 INFO - JMX Metrics Reporting started.
2017-01-21 07:37:12,099 INFO - JMX Metrics Reporting started.
2017-01-21 07:37:12,109 INFO - Starting TCP listener on address 192.168.0.12 and port 1883
2017-01-21 07:37:12,131 INFO - Starting Websocket listener on address 192.168.0.12 and port 8000
2017-01-21 07:37:12,139 INFO - Started TCP Listener on address 192.168.0.12 and on port 1883
2017-01-21 07:37:12,139 INFO - Started Websocket Listener on address 192.168.0.12 and on port 8000
2017-01-21 07:37:12,140 INFO - Started HiveMQ in 9967ms
2017-01-21 07:37:12,142 INFO - No valid license file found. Using evaluation license, restricted to 25 connections.
编辑
好的，这是一个 Nginx 问题，因为没有 SSL，我的 JavaScript 站点可以正常工作。正如我在这里看到的那样，应该可以对 http 使用 SSL 而对 websockets 使用不安全：
我尝试了那里的配置，但没有运气。
解决方案： HiveMQ 不需要 Nginx 代理。问题是 Firefox 不接受 websockets 的自签名证书。将“network.websocket.allowInsecureFromHTTPS”设置为 true 将使其工作。在 Chrome 中，您会收到有关 JavaScript 安全性的消息，您可以接受它。因为我只使用 Firefox 并且没有消息，所以花了几个小时才发现出了什么问题。paho onFailure 功能也没有出现。