[CAMEL-7673] subscribeTopicName leaks out as a property and used as a destination for mqtt producer, causes infinite delivery

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.12.2, 2.14.0
• Fix Version/s: 2.14.0
• Component/s: camel-mqtt
• Estimated Complexity: Unknown
• Assignee: Willem Jiang
• Reporter: Tomohisa Igarashi
• Created: 09/Aug/14 07:35
• Updated: 12/Jan/15 09:06
• Resolved: 27/Aug/14 07:01

Description

MQTT consumer sets its subscribeTopicName as a exchange property, and it will be used by MQTT producer as a destination if it exists in the route.

If you have a following route:

from("mqtt:input?subscribeTopicName=topicIn")
        .to("mqtt:output?publishTopicName=topicOut");

MQTT consumer put "topicIn" to "MQTTTopicPropertyName" exchange property, and MQTT producer uses this property to determine a destination topic to publish. Then MQTT producer ignores publishTopicName and send a message to "topicIn", so MQTT consumer consumes the message again, eventually it causes infinite delivery. We need to stop this property to be used as a destination for producer.

Issue Links

• relates to: CAMEL-8228 camel-mqtt - From mqtt to mqtt fails sending to specified publishTopicName