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linuxrabbitmqmqtt

RabbitMQ + MQTT: unable to publish any messages: login timeout

I deployed a RabbitMQ server with an MQTT plugin. All of a sudden, my app was no able to publish any messages:

info: paho: MQTT Client using: ssl://example.com:8883/
error: paho: [net]      connect got error EOF
error: paho: [net]      connect got error EOF
error: paho: [client]   Failed to connect to a broker

Same thing happens when I try to publish a message using CLI: it times out in exactly 10 seconds:

$ mosquitto_pub -h example.com -u "user" -P "pass" -t "test" -m "123"
Error: The connection was lost.

I checked the server logs, and they only have this:

[error] closing MQTT connection "1.2.3.4:40462 -> 4.5.6.7:1883" (login timeout)

"Login timeout". Why?

Solution

  • This is how RabbitMQ+MQTT behave when you're out of disk space: it just starts dropping connections, and the only message you get in the logs is this:

    closing MQTT connection: (login timeout)

    Get some disk space, reboot (just in case), and it will work just fine.

    Read more about this: Free Disk Space Alarms