Failed to start namenode when private network has IPv6 subnet

[Kazuki OIKAWA]

When cluster attached private network has IPv6 subnet, namenode failed to start.

2015-08-27 11:10:43,791 ERROR org.apache.hadoop.hdfs.server.namenode.NameNode: Failed to start namenode.
java.io.IOException: java.lang.RuntimeException: Could not resolve Kerberos principal name: java.net.UnknownHostException: test-master-v27-0.novalocal: test-master-v27-0.novalocal
        at org.apache.hadoop.http.HttpServer2.<init>(HttpServer2.java:347)
        at org.apache.hadoop.http.HttpServer2.<init>(HttpServer2.java:114)
        at org.apache.hadoop.http.HttpServer2$Builder.build(HttpServer2.java:290)
        at org.apache.hadoop.hdfs.server.namenode.NameNodeHttpServer.start(NameNodeHttpServer.java:126)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.startHttpServer(NameNode.java:752)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:638)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:811)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:795)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1488)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1554)
Caused by: java.lang.RuntimeException: Could not resolve Kerberos principal name: java.net.UnknownHostException: test-master-v27-0.novalocal: test-master-v27-0.novalocal
        at org.apache.hadoop.security.AuthenticationFilterInitializer.getFilterConfigMap(AuthenticationFilterInitializer.java:90)
        at org.apache.hadoop.http.HttpServer2.getFilterProperties(HttpServer2.java:454)
        at org.apache.hadoop.http.HttpServer2.constructSecretProvider(HttpServer2.java:445)
        at org.apache.hadoop.http.HttpServer2.<init>(HttpServer2.java:339)
        ... 9 more
Caused by: java.net.UnknownHostException: test-master-v27-0.novalocal: test-master-v27-0.novalocal
        at java.net.InetAddress.getLocalHost(InetAddress.java:1494)
        at org.apache.hadoop.security.SecurityUtil.getLocalHostName(SecurityUtil.java:190)
        at org.apache.hadoop.security.SecurityUtil.replacePattern(SecurityUtil.java:183)
        at org.apache.hadoop.security.SecurityUtil.getServerPrincipal(SecurityUtil.java:138)
        at org.apache.hadoop.security.AuthenticationFilterInitializer.getFilterConfigMap(AuthenticationFilterInitializer.java:87)
        ... 12 more
Caused by: java.net.UnknownHostException: test-master-v27-0.novalocal
        at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method)
        at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:922)
        at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1314)
        at java.net.InetAddress.getLocalHost(InetAddress.java:1490)
        ... 16 more
2015-08-27 11:10:43,795 INFO org.apache.hadoop.util.ExitUtil: Exiting with status 1
2015-08-27 11:10:43,797 INFO org.apache.hadoop.hdfs.server.namenode.NameNode: SHUTDOWN_MSG:

/etc/hosts writes IPv6 address
ubuntu@test-master-v27-0:~$ cat /etc/hosts
127.0.0.1 localhost
fd28:b3d2:1d2b:0:f816:3eff:fe25:5f06 test-master-v27-0.novalocal test-master-v27-0
fd28:b3d2:1d2b:0:f816:3eff:fef0:8a95 test-slave-v27-0.novalocal test-slave-v27-0

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/217669

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/217669
Committed: https://git.openstack.org/cgit/openstack/sahara/commit/?id=1622710e2bb0a7017abedb8a4dc26d0223583e15
Submitter: Jenkins
Branch: master

commit 1622710e2bb0a7017abedb8a4dc26d0223583e15
Author: Kazuki OIKAWA <email address hidden>
Date: Thu Aug 27 20:48:32 2015 +0900

    Selects IPv4 preferentially for internal_ip

    Hadoop doesn't support IPv6.
    Selects IPv4 preferentially for internal_ip/management_ip
    when private network has IPv4/IPv6 dual subnets.

    Change-Id: Ibc808d5467ea6db081cdc98655c7eb7faffa6ec3
    Closes-Bug: #1489433