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TCP 8020

ProtocolTCP
Port8020
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Synopsis

  • Apache Hadoop: TCP 8020 is the default HDFS NameNode RPC port (dfs.namenode.rpc-address); clients use URIs like hdfs://namenode:8020 for filesystem operations.
  • Cloudera CDH/CDP and Hortonworks HDP: Their HDFS deployments use the same 8020 NameNode RPC endpoint by default.
  • Cloud Hadoop services: Amazon EMR and Google Cloud Dataproc use HDFS with the NameNode RPC service on 8020 (exposed or internally on cluster nodes).
  • Dell EMC PowerScale (Isilon) OneFS: Its HDFS service emulates a NameNode RPC listener on TCP 8020 for Hadoop client compatibility.
  • Azure HDInsight (managed Hadoop): Uses the standard HDFS NameNode RPC port 8020 within clusters.

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