Daedaluz
commented
4 days ago Caused by: java.net.ConnectException: Connection refused: connect
Connection refused usually means the server isn't running?
What if you check if the server is actually running - and listening?
ss -lntp
or
netstat -lntp
Problem: I am using client app mqtt.fx to connect mosquitto and it works well until yesterday. However, today unable to connect to server error is occured. I tried the following but not work. 1.Restarted Mosquitto. 2.Restarted Server PC. 3.Changed firewall setting to open port 1883. 4.Mosquitto.conf is not changed.(listener 1883 , allow_anonymous true)
Error Log is shown as below. Could you please tell me how to resolve this problem? Thank you. Error Log: `` 2024-09-27 17:20:22,607 INFO --- MqttFX ClientModel : MqttClient with ID MQTT_FX_Client assigned. 2024-09-27 17:20:27,000 ERROR --- MqttFX ClientModel : Error when connecting org.eclipse.paho.client.mqttv3.MqttException: Unable to connect to server at org.eclipse.paho.client.mqttv3.internal.TCPNetworkModule.start(TCPNetworkModule.java:94) ~[org.eclipse.paho.client.mqttv3-1.2.0.jar:?] at org.eclipse.paho.client.mqttv3.internal.ClientComms$ConnectBG.run(ClientComms.java:701) ~[org.eclipse.paho.client.mqttv3-1.2.0.jar:?] at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) ~[?:1.8.0_181] at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:1.8.0_181] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(Unknown Source) ~[?:1.8.0_181] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source) ~[?:1.8.0_181] at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:1.8.0_181] at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:1.8.0_181] at java.lang.Thread.run(Unknown Source) [?:1.8.0_181] Caused by: java.net.ConnectException: Connection refused: connect at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method) ~[?:1.8.0_181] at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source) ~[?:1.8.0_181] at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source) ~[?:1.8.0_181] at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source) ~[?:1.8.0_181] at java.net.AbstractPlainSocketImpl.connect(Unknown Source) ~[?:1.8.0_181] at java.net.PlainSocketImpl.connect(Unknown Source) ~[?:1.8.0_181] at java.net.SocksSocketImpl.connect(Unknown Source) ~[?:1.8.0_181] at java.net.Socket.connect(Unknown Source) ~[?:1.8.0_181] at org.eclipse.paho.client.mqttv3.internal.TCPNetworkModule.start(TCPNetworkModule.java:84) ~[org.eclipse.paho.client.mqttv3-1.2.0.jar:?] ... 8 more 2024-09-27 17:20:27,005 ERROR --- MqttFX ClientModel : Please verify your Settings (e.g. Broker Address, Broker Port & Client ID) and the user credentials! org.eclipse.paho.client.mqttv3.MqttException: Unable to connect to server at org.eclipse.paho.client.mqttv3.internal.TCPNetworkModule.start(TCPNetworkModule.java:94) ~[org.eclipse.paho.client.mqttv3-1.2.0.jar:?] at org.eclipse.paho.client.mqttv3.internal.ClientComms$ConnectBG.run(ClientComms.java:701) ~[org.eclipse.paho.client.mqttv3-1.2.0.jar:?] at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) ~[?:1.8.0_181] at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:1.8.0_181] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(Unknown Source) ~[?:1.8.0_181] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source) ~[?:1.8.0_181] at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:1.8.0_181] at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:1.8.0_181] at java.lang.Thread.run(Unknown Source) [?:1.8.0_181] Caused by: java.net.ConnectException: Connection refused: connect at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method) ~[?:1.8.0_181] at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source) ~[?:1.8.0_181] at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source) ~[?:1.8.0_181] at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source) ~[?:1.8.0_181] at java.net.AbstractPlainSocketImpl.connect(Unknown Source) ~[?:1.8.0_181] at java.net.PlainSocketImpl.connect(Unknown Source) ~[?:1.8.0_181] at java.net.SocksSocketImpl.connect(Unknown Source) ~[?:1.8.0_181] at java.net.Socket.connect(Unknown Source) ~[?:1.8.0_181] at org.eclipse.paho.client.mqttv3.internal.TCPNetworkModule.start(TCPNetworkModule.java:84) ~[org.eclipse.paho.client.mqttv3-1.2.0.jar:?] ... 8 more 2024-09-27 17:20:27,010 INFO --- ScriptsController : Clear console. 2024-09-27 17:20:27,010 ERROR --- BrokerConnectService : Unable to connect to server
``