[jira] [Closed] (FLINK-2837) FlinkTopologyBuilder cannot handle multiple input streams

["Matthias J. Sax (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-2837?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matthias J. Sax closed FLINK-2837.
----------------------------------
    Resolution: Fixed

> FlinkTopologyBuilder cannot handle multiple input streams
> ---------------------------------------------------------
>
>                 Key: FLINK-2837
>                 URL: https://issues.apache.org/jira/browse/FLINK-2837
>             Project: Flink
>          Issue Type: Bug
>          Components: Storm Compatibility
>            Reporter: Matthias J. Sax
>            Assignee: Matthias J. Sax
>
> FlinkTopologyBuilder cannot handle multiple input streams correctly. Instead of union the incoming streams, it replicates the consuming bolt and each (logical) instance processes one of the input streams.
> For example:
> {noformat}
> final FlinkTopologyBuilder builder = new FlinkTopologyBuilder();
> builder.setSpout(spoutId1, new FiniteRandomSpout(0, 10));
> builder.setSpout(spoutId2, new FiniteRandomSpout(1, 8));
> builder.setSpout(spoutId3, new FiniteRandomSpout(2, 13));
> builder.setBolt(boltId, new MergerBolt())
> 	.shuffleGrouping(spoutId1)
> 	.shuffleGrouping(spoutId2)
> 	.shuffleGrouping(spoutId3);
> builder.setBolt("sink", new BoltPrintSink(new SimpleOutputFormatter()))
> 	.shuffleGrouping(boltId);
> {noformat}
> will only print the data from a single source instead of all sources.



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