Hi all, Could you please share more information about the following scenario... trying to run exactly the statement you mentioned... running from the active master_node : 16/09/26 17:42:53 INFO balancer.Balancer: namenodes = [hdfs://hadoop2, hdfs://linux.lab.domain.com:8020] 16/09/26 17:42:53 INFO balancer.Balancer: parameters = Balancer.Parameters [BalancingPolicy.Node, threshold = 5.0, max idle iteration = 5, #excluded nodes = 0, #included nodes = 0, #source nodes = 0, run during upgrade = false] 16/09/26 17:42:53 INFO balancer.Balancer: included nodes = [] 16/09/26 17:42:53 INFO balancer.Balancer: excluded nodes = [] 16/09/26 17:42:53 INFO balancer.Balancer: source nodes = [] Time Stamp Iteration# Bytes Already Moved Bytes Left To Move Bytes Being Moved 16/09/26 17:42:53 INFO balancer.KeyManager: Block token params received from NN: update interval=10hrs, 0sec, token lifetime=10hrs, 0sec 16/09/26 17:42:53 INFO block.BlockTokenSecretManager: Setting block keys 16/09/26 17:42:53 INFO balancer.KeyManager: Update block keys every 2hrs, 30mins, 0sec 16/09/26 17:42:54 INFO block.BlockTokenSecretManager: Setting block keys org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.ipc.StandbyException): Operation category READ is not supported in state standby at org.apache.hadoop.hdfs.server.namenode.ha.StandbyState.checkOperation(StandbyState.java:87) at org.apache.hadoop.hdfs.server.namenode.NameNode$NameNodeHAContext.checkOperation(NameNode.java:1872) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkOperation(FSNamesystem.java:1306) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getServerDefaults(FSNamesystem.java:1618) at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.getServerDefaults(NameNodeRpcServer.java:595) at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.getServerDefaults(ClientNamenodeProtocolServerSideTranslatorPB.java:383) at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java) at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616) at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:969) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2137) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2133) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Unknown Source) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657) at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2131) . Exiting ... . Exiting ... Sep 26, 2016 5:42:54 PM Balancing took 1.314 seconds it runs in less than 2 seconds....what seems not running 100% , right ? How many seconds it could take in average if it really runs fine ? or is there any log to check further information if some error is happenning ? I also tried to run the same from the Ambari console (balance all nodes)... the same result is reached. thanks and br ... View more