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

HBase Forum

Datanode denied communication with namenode on localhost?

  • #36413
    Nancy Snyder

    I am using HBaseTestingUtility for testing on my localhost (Windows 7). This used to work but something has changed?

    configuration = new Configuration();
    hBaseTestingUtility = new HBaseTestingUtility(configuration);
    .setInt(HConstants.REGIONSERVER_PORT, getPreDefinedPortNumberOrMakeOne(HConstants.REGIONSERVER_PORT));
    .set(“”, “-1”);
    .set(“”, “”);
    .set(“hbase.master.dns.interface”, “lo”);
    .set(“hbase.regionserver.dns.interface”, “lo”);

    // defined the DFS cluster more explicitly (than accept the defaults)
    MiniDFSCluster miniDFSCluster = new MiniDFSCluster.Builder(configuration)
    .hosts(new String[]{“”})
    // start HDFS filesystem

    But it fails with this error:
    09-16 13:30:19 | FATAL | Initialization failed for block pool Block pool BP-1667223652- (storage id DS-1871975488- service to
    org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server.protocol.DisallowedDatanodeException): Datanode denied communication with namenode: DatanodeRegistration(, storageID=DS-1871975488-, infoPort=61529, ipcPort=61532, storageInfo=lv=-40;cid=testClusterID;nsid=797600457;c=0)

    Why is it denying access to my localhost? I heard it was a firewall problem, so in windows I allowed java communication thru but it still fails?

    I also edited my hosts files but everything I tried did not work.

    ANY SUGGESTIONS? This is just for simple testing on local host.

  • Author
  • #38244

    Hi Nancy,

    This is a HDP on Windows issue. Please post your question in the correct section. By the way, it is not recommended to bind to Localhost.



The forum ‘HBase’ 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.