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https://issues.apache.org/jira/browse/TEZ-3207?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15263432#comment-15263432
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Ming Ma commented on TEZ-3207:
------------------------------
Thanks [~sseth]!
> Add support for fetching multiple partitions from the same source task to
> UnorderedKVInput
> ------------------------------------------------------------------------------------------
>
> Key: TEZ-3207
> URL: https://issues.apache.org/jira/browse/TEZ-3207
> Project: Apache Tez
> Issue Type: Bug
> Reporter: Ming Ma
> Assignee: Ming Ma
> Fix For: 0.9.0
>
> Attachments: TEZ-3207-2.patch, TEZ-3207-3.patch, TEZ-3207.patch
>
>
> The ordered grouped {{ShuffleScheduler}} can support fetching multiple
> partitions from the same source task. But for the unordered ShuffleManager,
> it only supports one partition per source task due to the following issue
> where {{identifier}} doesn't take partition id into account.
> {noformat}
> public void addKnownInput(String hostName, int port,
> InputAttemptIdentifier srcAttemptIdentifier, int srcPhysicalIndex) {
> String identifier = InputHost.createIdentifier(hostName, port);
> InputHost host = knownSrcHosts.get(identifier);
> ....
> }
> {noformat}
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