Hadoop HDFS，Java客户端无法连接到HDFS

Question

I am trying to connect my java client to my hadoop HDFS, but i am stuck when i try to get the fs from my configuration

Configuration conf = new Configuration();
conf.set("fs.default.name", _PATH_);
conf.set("fs.hdfs.impl", "org.apache.hadoop.hdfs.DistributedFileSystem");
FileSystem f = FileSystem.get( conf );

Then I get this exp..

java.lang.RuntimeException: class org.apache.hadoop.security.JniBasedUnixGroupsMappingWithFallback not org.apache.hadoop.security.GroupMappingServiceProvider

I googled it but noting handfull come. Any advices?

PS: I use the package hadoop-common, hadoop-hdfs from 2.0.0-cdh4.2.0

Thanks Anthony.

Answer 1

Try below Code:

Path coreSitePath = new Path("/path/of/HADOOP_HOME", "conf/core-site.xml");
conf.addResource(coreSitePath);
FileSystem fs = FileSystem.get(conf)