Using the Message Hub Kafka interface, I've found that my Bluemix app that was using client.id authentication is getting connections refused by the Kafka brokers. How do I fix this?
Client ID authentication no longer works with Kafka API
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The Message Hub service is switching off client.id authentication in mid-January 2016. It is replaced by SASL authentication. Documentation on authenticating with the service using SASL can be found in the documentation: https://www.ng.bluemix.net/docs/services/MessageHub/index.html#messagehub063 https://developer.ibm.com/messaging/2016/01/25/message-hub-beta-plan-ending/
A Java sample using the Message Hub SASL login library can be found at: https://github.com/ibm-messaging/message-hub-samples
SASL is currently available on both port 9093 and 9094 for a grace period, after which 9094 will be switched off. The timeline for this change is also available in the Message Hub docs, as linked above.