sxljhs:
博主，cv了一下，收没有问题，但是在发的时候报错 org.eclipse.paho.client.mqttv3.MqttException: 已断开连接
at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:197) ~[org.eclipse.paho.client.mqttv3-1.2.5.jar:na]
at java.lang.Thread.run(Thread.java:745) ~[na:1.8.0_31]
Caused by: java.io.EOFException: null
at java.io.DataInputStream.readByte(DataInputStream.java:267) ~[na:1.8.0_31]
at org.eclipse.paho.client.mqttv3.internal.wire.MqttInputStream.readMqttWireMessage(MqttInputStream.java:92) ~[org.eclipse.paho.client.mqttv3-1.2.5.jar:na]
at org.eclipse.paho.client.mqttv3.internal.CommsReceiver.run(CommsReceiver.java:137) ~[org.eclipse.paho.client.mqttv3-1.2.5.jar:na]
... 1 common frames omitted
但也能发出去，请问这是什么原因