The Hortonworks Community Connection is now live. A completely rebuilt Q&A forum, Knowledge Base, Code Hub and more, backed by the experts in the industry.

You will be redirected here in 10 seconds. If your are not redirected, click here to visit the new site.

The legacy Hortonworks Forum is now closed. You can view a read-only version of the former site by clicking here. The site will be taken offline on January 31,2016

YARN Forum

All containers launched on a single node

  • #57803
    Elad Itzhakian


    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?


The forum ‘YARN’ is closed to new topics and replies.

Support from the Experts

A HDP Support Subscription connects you experts with deep experience running Apache Hadoop in production, at-scale on the most demanding workloads.

Enterprise Support »

Become HDP Certified

Real world training designed by the core architects of Hadoop. Scenario-based training courses are available in-classroom or online from anywhere in the world

Training »

Hortonworks Data Platform
The Hortonworks Data Platform is a 100% open source distribution of Apache Hadoop that is truly enterprise grade having been built, tested and hardened with enterprise rigor.
Get started with Sandbox
Hortonworks Sandbox is a self-contained virtual machine with Apache Hadoop pre-configured alongside a set of hands-on, step-by-step Hadoop tutorials.
Modern Data Architecture
Tackle the challenges of big data. Hadoop integrates with existing EDW, RDBMS and MPP systems to deliver lower cost, higher capacity infrastructure.