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From "Claudio Martella (Commented) (JIRA)" <>
Subject [jira] [Commented] (GIRAPH-124) Combiner should return Iterable<M> instead of M or null.
Date Mon, 23 Jan 2012 22:17:41 GMT


Claudio Martella commented on GIRAPH-124:

Apparently I forgot to add Just fixed it. Resolving.
> Combiner should return Iterable<M> instead of M or null.
> --------------------------------------------------------
>                 Key: GIRAPH-124
>                 URL:
>             Project: Giraph
>          Issue Type: Improvement
>          Components: graph
>    Affects Versions: 0.1.0
>            Reporter: Claudio Martella
>         Attachments: GIRAPH-124.diff, GIRAPH-124.diff
> Currently VertexCombiner is expected to return a single message combining the input messages,
or null in case no message should be sent. The new expected interface should return an Iterable<M>,
possibly empty. The number of elements in the returned Iterable is supposed to be smaller
than the number of input messages, by the initial definition of a Combiner (defined as a function
to reduce I/O by combining multiple messages into 1).

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