[AMBARI-13373] hdfs balancer via ambari fails to run once HA is enabled

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 2.1.2
• Fix Version/s: 2.2.0
• Component/s: ambari-web
• Assignee: Dmytro Sen
• Reporter: Antonenko Alexander
• Created: 09/Oct/15 12:48
• Updated: 15/Oct/15 17:44
• Resolved: 15/Oct/15 15:00

Description

Ran hdfs balancer via ambari on a cluster that had HA enabled and it failed.

Starting balancer with threshold = 10
Executing command ambari-sudo.sh su hdfs -l -s /bin/bash -c 'export  PATH='"'"'/usr/sbin:/sbin:/usr/lib/ambari-server/*:/usr/sbin:/sbin:/usr/lib/ambari-server/*:/usr/lib64/qt-3.3/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin:/var/lib/ambari-agent:/var/lib/ambari-agent:/usr/hdp/current/hadoop-client/bin'"'"' ; hdfs --config /usr/hdp/current/hadoop-client/conf balancer -threshold 10'
2015-10-06 23:33:27,059 - Execute['ambari-sudo.sh su hdfs -l -s /bin/bash -c 'export  PATH='"'"'/usr/sbin:/sbin:/usr/lib/ambari-server/*:/usr/sbin:/sbin:/usr/lib/ambari-server/*:/usr/lib64/qt-3.3/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin:/var/lib/ambari-agent:/var/lib/ambari-agent:/usr/hdp/current/hadoop-client/bin'"'"' ; hdfs --config /usr/hdp/current/hadoop-client/conf balancer -threshold 10''] {'logoutput': False, 'on_new_line': handle_new_line}
[balancer] 15/10/06 23:33:29 INFO balancer.Balancer: Using a threshold of 10.0
[balancer] 15/10/06 23:33:29 INFO balancer.Balancer: namenodes  = [hdfs://pre-prod-poc-1.novalocal:8020, hdfs://pre-prod-hdp-2-3]
[balancer] 15/10/06 23:33:29 INFO balancer.Balancer: parameters = Balancer.Parameters [BalancingPolicy.Node, threshold = 10.0, max idle iteration = 5, #excluded nodes = 0, #included nodes = 0, #source nodes = 0, run during upgrade = false]
[balancer] 15/10/06 23:33:29 INFO balancer.Balancer: included nodes = []
[balancer] 15/10/06 23:33:29 INFO balancer.Balancer: excluded nodes = []
[balancer] 15/10/06 23:33:29 INFO balancer.Balancer: source nodes = []
[balancer] Time Stamp               Iteration#  Bytes Already Moved  Bytes Left To Move  Bytes Being Moved[balancer] 
[balancer] 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$ProtoBufRpcInvoker.call(Proto[balancer] bufRpcEngine.java:616)
	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:969)
	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2137)
	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2133)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:422)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2131)
.  Exiting ...[balancer] 
[balancer] Oct 6, 2015 11:33:31 PM [balancer]  [balancer] Balancing took 2.281 seconds[balancer]

If you look at the log it looks like we are adding a namenode to the list which is in standby. Should we not be using just the name service?

[balancer] 15/10/06 23:33:29 INFO balancer.Balancer: namenodes  = [hdfs://pre-prod-poc-1.novalocal:8020, hdfs://pre-prod-hdp-2-3]
[balancer] 15/10/06 23:33:29 INFO balancer.Balancer: parameters = Balancer.Parameters 

[root@pre-prod-poc-1 hive-testbench]# ambari-server --hash
226dfd1c6136f859fc42dd18e7090a9346f0f745

root@pre-prod-poc-1 hive-testbench]# rpm -qa | grep ambari
ambari-metrics-hadoop-sink-2.1.2-370.x86_64
ambari-server-2.1.2-370.x86_64
ambari-metrics-monitor-2.1.2-370.x86_64
ambari-agent-2.1.2-370.x86_64
[root@pre-prod-poc-1 hive-testbench]#

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