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https://issues.apache.org/jira/browse/SAMZA-353?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14105504#comment-14105504
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Chris Riccomini commented on SAMZA-353:
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Can anyone think of use cases for this aside from the "global state" use case
that I've outlined above? [~martinkl], I think you had mentioned this in
SAMZA-123. Did have anything specific in mind?
One use case that I can think of aside from global state is just a global
stream, where you might want to do things with state, you might just want to
have every StreamTask receive the full stream. I'm having trouble coming up
with practical reasons as to why you'd want this, though.
> Support assigning the same SSP to multiple tasknames
> ----------------------------------------------------
>
> Key: SAMZA-353
> URL: https://issues.apache.org/jira/browse/SAMZA-353
> Project: Samza
> Issue Type: Bug
> Components: container
> Affects Versions: 0.8.0
> Reporter: Jakob Homan
>
> Post SAMZA-123, it is possible to add the same SSP to multiple tasknames,
> although currently we check for this and error out if this is done. We
> should think through the implications of having the same SSP appear in
> multiple tasknames and support this if it makes sense.
> This could be used as a broadcast stream that's either added by Samza itself
> to each taskname, or individual groupers could do this as makes sense. Right
> now the container maintains a map of SSP to TaskInstance and delivers the ssp
> to that task instance. With this change, we'd need to change the map to SSP
> to Set[TaskInstance] and deliver the message to each TI in the set.
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