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Hudson commented on HDFS-1875: ------------------------------ Integrated in Hadoop-Hdfs-trunk #699 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/699/]) > MiniDFSCluster hard-codes dfs.datanode.address to localhost > ----------------------------------------------------------- > > Key: HDFS-1875 > URL: https://issues.apache.org/jira/browse/HDFS-1875 > Project: Hadoop HDFS > Issue Type: Bug > Components: test > Affects Versions: 0.22.0 > Reporter: Eric Payne > Assignee: Eric Payne > Fix For: 0.23.0 > > Attachments: HDFS-1875.patch, HDFS-1875.patch > > > When creating RPC addresses that represent the communication sockets for each > simulated DataNode, the MiniDFSCluster class hard-codes the address of the > dfs.datanode.address port to be "127.0.0.1:0" > The DataNodeCluster test tool uses the MiniDFSCluster class to create a > selected number of simulated datanodes on a single host. In the > DataNodeCluster setup, the NameNode is not simulated but is started as a > separate daemon. > The problem is that if the write requrests into the simulated datanodes are > originated on a host that is not the same host running the simulated > datanodes, the connections are refused. This is because the RPC sockets that > are started by MiniDFSCluster are for "localhost" (127.0.0.1) and are not > accessible from outside that same machine. > It is proposed that the MiniDFSCluster.setupDatanodeAddress() method be > overloaded in order to accommodate an environment where the NameNode is on > one host, the client is on another host, and the simulated DataNodes are on > yet another host (or even multiple hosts simulating multiple DataNodes each). > The overloaded API would add a parameter that would be used as the basis for > creating the RPS sockets. By default, it would remain 127.0.0.1 -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira