Team, Please see [1]
In short - we need a way to prevent selection of 'run once' by users for components that don't actually support it or work that way. MergeContent is a great example but listing components and Kafka and likely many others won't do anything useful with 'run once' invocations. I'll kick off a vote thread once discussion seems stable. Thanks Joe [1] https://issues.apache.org/jira/browse/NIP-5
