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https://issues.apache.org/jira/browse/TEZ-1172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14028701#comment-14028701
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Siddharth Seth commented on TEZ-1172:
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bq. Multiple inputs without initializers should not need a custom manager right?
No, they shouldn't. There don't seem to be any use cases for this at the moment
though, and wasn't the original intent of this jira. Should be fairly simple to
support.
bq. Same comment as above. Also how about the -1 numTasks requirement?
-1 is not a requirement for multiple tasks. It's possible to set parallelism at
DAG creation time, and then just generate events in the AM which will be
routed by a CustomVertex.
bq Btw, hasnt the client already checked for this?
Yep. Same sanity check on the AM.
> Allow multiple Root Input initializers to be specified per Vertex
> -----------------------------------------------------------------
>
> Key: TEZ-1172
> URL: https://issues.apache.org/jira/browse/TEZ-1172
> Project: Apache Tez
> Issue Type: Improvement
> Reporter: Siddharth Seth
> Assignee: Siddharth Seth
> Attachments: TEZ-1172.1.txt, TEZ-1172.2.txt
>
>
> The default VertexManager in Tez for this handles only 1 RootInput - since it
> doesn't know how to combine multiple different Inputs. However, if a custom
> vertex manager plugin is specified by users - it should be possible to
> specify multiple RootInputs.
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