Hello, i have installed ambari 2.2.2 on Centos 6.8 Azure platform. i ve installed services i need successfully, but when i want to start them, zookeeper starts fine, but HDFS does not! here is the log of /var/log/hadoop/hdfs/hadoop-hdfs-namenode-namenode.log: 2017-02-14 11:00:21,714 ERROR namenode.NameNode (NameNode.java:main(1714)) - Failed to start namenode. java.net.BindException: Port in use: namenode:50070 at org.apache.hadoop.http.HttpServer2.openListeners(HttpServer2.java:919) at org.apache.hadoop.http.HttpServer2.start(HttpServer2.java:856) at org.apache.hadoop.hdfs.server.namenode.NameNodeHttpServer.start(NameNodeHttpServer.java:156) at org.apache.hadoop.hdfs.server.namenode.NameNode.startHttpServer(NameNode.java:892) at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:720) at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:951) at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:935) at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1641) at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1709) Caused by: java.net.BindException: Cannot assign requested address at sun.nio.ch.Net.bind0(Native Method) at sun.nio.ch.Net.bind(Net.java:433) at sun.nio.ch.Net.bind(Net.java:425) at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223) at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74) at org.mortbay.jetty.nio.SelectChannelConnector.open(SelectChannelConnector.java:216) at org.apache.hadoop.http.HttpServer2.openListeners(HttpServer2.java:914) ... 8 more 2017-02-14 11:00:21,715 INFO util.ExitUtil (ExitUtil.java:terminate(124)) - Exiting with status 1 2017-02-14 11:00:21,718 INFO namenode.NameNode (LogAdapter.java:info(47)) - SHUTDOWN_MSG: i want to mention that the port 50070 is not in use, cause the following command does not return any line. netstat -tulpn | grep :50070 Also, i have changed the port number to 50071, restarted everything, but the issue was not solved. Any help will be appreciated thank you ... View more