[CAMEL-8923] Kafka: Topic name lookup from message headers in the producer causes infinite loop

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.15.1
• Fix Version/s: 2.16.0, 2.15.4
• Component/s: camel-kafka
• Estimated Complexity: Unknown
• Assignee: Willem Jiang
• Reporter: RAHUL JAIN
• Created: 01/Jul/15 08:21
• Updated: 04/Sep/15 08:28
• Resolved: 01/Jul/15 15:20

Description

Refer changes done for CAMEL-7331

The change causes a critical bug.
For a camel route as follows:

from("kafka://<broker>?topic=T1")
.process(myProcessor)
.to("kafka://<broker>?topic=T2")

KafkaExchange will be created by KafkaConsumer and the topic will be set to "T1" in the header.
For the 'to' endpoint, KafkaProducer will try to read the topic from the exchange header which is still "T1" instead of "T2" thereby causing an infinite loop.

As discussed in user-group, a different header should be used to read the topic name from message.

Issue Links

• is duplicated by: CAMEL-9108 Camel Kafka component builds Producer topic off of message instead of to() URI