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Editorial Team
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Asked: 2026-05-22T20:59:42+00:00

For a special reason, I want to setup a hadoop node to be a

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For a special reason, I want to setup a hadoop node to be a tasktracker but not a datanode. It seems like there is a way to do it but I have not been able too. Could someone give me a hand?
Thanks.

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1 Answer

  1. Editorial Team

    You have to setup a host-exclude file for your namenode.
    This edit in the core-site.xml:

    <property>
  <name>dfs.hosts.exclude</name>
  <value>YOUR_PATH_TO_THE_EXCLUDE_FILE</value>
</property>

    This file is basically like a slave or master file. You have to just insert the hostname like:

    host1
host2

    When restarting the namenode will ignore these given hosts but the jobtracker will launch a tasktracker.

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