HDFS NFS GateWay mount.nfs: Input/output error?

Question

1.The errors are as follow:

[root@xx sbin]# mount -t nfs -o vers=3,proto=tcp,nolock,noacl,sync localhost:/ /hdfs_y
mount.nfs: Input/output error

2016-03-10 15:12:06,350 WARN org.apache.hadoop.hdfs.nfs.nfs3.RpcProgramNfs3: Exception
804 org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.security.authorize.AuthorizationException): User: hadoop is not allowed to impersonate root
805 at org.apache.hadoop.ipc.Client.call(Client.java:1475)
......

2.The process of hadoop, and the user "hadoop" start hadoop.

[root@WEB-W031 sbin]# jps
6755 Nfs3
11199 Jps
6163 Portmap
7977 SecondaryNameNode
7720 NameNode
8217 ResourceManager
16762 org.eclipse.equinox.launcher_1.3.0.v20130327-1440.jar

[hadoop@WEB-W031 hadoop]$ jps
6755 Nfs3
7977 SecondaryNameNode
7720 NameNode
8217 ResourceManager
11239 Jps
You have new mail in /var/spool/mail/root

3.reference： https://hadoop.apache.org/docs/r2.7.2/hadoop-project-dist/hadoop-hdfs/HdfsNfsGateway.html#Allow_mounts_from_unprivileged_clients

Thanks very much!

Have you added hadoop.proxyuser.hadoop.hosts to core-site.xml ? — Mobin Ranjbar
– Mobin Ranjbar, Commented Mar 10, 2016 at 10:06
Thanks, when I added hadoop.proxyuser.hadoop.hosts to core-site.xml, the above bug fixed. — charisMao
– charisMao, Commented Mar 11, 2016 at 1:28

Mobin Ranjbar · Accepted Answer · 2016-03-11 08:14:06Z

2

You need to add these lines to your core-site.xml :

<property>
  <name>hadoop.proxyuser.hadoop.groups</name>
  <value>*</value>
</property>
<property>
  <name>hadoop.proxyuser.hadoop.hosts</name>
  <value>*</value>
</property>

answered Mar 11, 2016 at 8:14

Mobin Ranjbar

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2 Comments

Mobin Ranjbar Over a year ago

So, select my answer as the best answer. Thanks.

charisMao Over a year ago

oh,but I have no privilege.

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