sven-lange-last opened a new pull request #3193: No automatic topic creation in 
Kafka
URL: https://github.com/apache/incubator-openwhisk/pull/3193
 
 
   So far, we had automatic topic creation - the broker would automatically 
create a topic if a producer sent a message to a topic or a consumer tried to 
receive messages from a topic. In that case, topic would be created 
automatically with default settings. These default settings are not always what 
we need. In the end, this is a race condition during deployment. If we manage 
to create a topic with desired settings before it gets auto-created with 
default settings, we are fine. Otherwise, we may see undesired effects.
   
   This change disables automatic topic creation.

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