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https://issues.apache.org/jira/browse/KAFKA-3794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15317475#comment-15317475
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Bill Bejeck commented on KAFKA-3794:
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picking this one up, mea culpa
> Add Stream / Table prefix in print functions
> --------------------------------------------
>
> Key: KAFKA-3794
> URL: https://issues.apache.org/jira/browse/KAFKA-3794
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Reporter: Guozhang Wang
> Assignee: Bill Bejeck
> Labels: newbie, user-experience
>
> Currently the KTable/KStream.print() operator will print the key-value pair
> as it was forwarded to this operator. However, if there are multiple
> operators in the topologies with the same {{PrintStream}} (e.g. stdout),
> their printed key-value pairs will be interleaving on that stream channel.
> Hence it is better to add a prefix for different KStream/KTable.print
> operators. One proposal:
> 1) For KTable, it inherits a table name when created, and we can use that
> name as the prefix as {{[table-name]: key, value}}.
> 2) For KStream, we can overload the function with an additional "name"
> parameter that we use as the prefix; if it is not specified, then we can use
> the parent processor node name, which has the pattern like
> {{KSTREAM-JOIN-suffix_index}}.
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