Home Forums YARN All containers launched on a single node

This topic contains 0 replies, has 1 voice, and was last updated by  Elad Itzhakian 4 months ago.

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    Elad Itzhakian
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    Hello,

    I’m using HDP2.1 (HDFS & YARN services) on a 4-node cluster (1xNN, 3xDN)

    Trying to run TestDFSIO benchmarks I noticed all of the containers (100 in total) are being launched on a single node even though I’ve got two other perfectly working NodeManagers. This obviously gives very bad performance.

    Browsing through the DFS I saw all control files (/benchmarks/TestDFSIO/io_control/*) were replicated successfully on 3 different datanodes.

    The cluster is healthy according to all Ambari checks, 3/3 DN alive, 3/3 NM alive, all seems just fine.

    What can cause this kind of behavior and how can I fix it?

    Thanks,
    Elad

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