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From "Stu Hood (JIRA)" <>
Subject [jira] Updated: (CASSANDRA-342) hadoop integration
Date Fri, 05 Feb 2010 06:58:28 GMT


Stu Hood updated CASSANDRA-342:

    Attachment: 0006-prevent-multiple-client-initializations.txt

This patch runs initClient in the JVM that is executing the map task, and adds a check to
prevent multiple initializations by the same VM.

Even with this patch though, the fat client can't connect from multiple JVMs on the same machine:
we have the fatClient VM using an address of, and multiple JVMs with the same address
will fail to join the gossip. The fatClient needs to be refactored to not need to listen on
a port (no gossip)

> hadoop integration
> ------------------
>                 Key: CASSANDRA-342
>                 URL:
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Core
>            Reporter: Jonathan Ellis
>            Assignee: Jonathan Ellis
>             Fix For: 0.6
>         Attachments: 0001-v3-CASSANDRA-342.-Set-up-for-the-hadoop-commits.patch, 0001-v4-add-basic-hadoop-support-one-split-per-node.txt,
0001-v5-add-basic-hadoop-support-one-split-per-node.txt, 0002-v3-CASSANDRA-342.-Working-hadoop-support.patch,
0002-v4-add-wordcount-hadoop-example.txt, 0002-v5-add-wordcount-hadoop-example.txt, 0003-v3-CASSANDRA-342.-Adding-the-WordCount-example.patch,
0003-v4-add-WordCountSetup-multiple-tests.txt, 0003-v5-make-predicate-configurable.txt, 0004-v5-sub-splits.txt,
0005-v5-jar-packaging.txt, 0006-prevent-multiple-client-initializations.txt
> Some discussion on -dev:

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