tambalavanar on "Java code to perform CFS file operations from remote system is not working"

I'm writing a java program to read & write files to CFS from a remote system (non DSE machine). As suggested in the DataStax Site, I wrote the following piece of code.


import java.net.URI;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.*;
import org.apache.hadoop.security.UserGroupInformation;

import com.datastax.bdp.hadoop.cfs.CassandraFileSystem;

public class CassandraFileHelper {

public static void main(String[] args) throws Exception {

FSDataOutputStream o = null;
CassandraFileSystem cfs = null;
String content = "some text content..";

try {
System.setProperty("cassandra.config", "conf/cassandra.yaml");
System.setProperty("dse.config", "conf/dse.yaml");

Configuration conf = new Configuration();
conf.addResource(new Path("conf/core-site.xml"));

UserGroupInformation.createUserForTesting("unixuserid", new String[] { "usergroupname" });
UserGroupInformation.setConfiguration(conf);

cfs = new CassandraFileSystem();
cfs.initialize(URI.create("cfs://hostname:9160/"), conf);

o = cfs.create(new Path("/folder/testfile.txt"), true);
o.write(content.getBytes());
o.flush();

} catch (Exception err) {
System.out.println("Error: " + err.toString());
} finally {
if (o != null)
o.close();
if (cfs != null)
cfs.close();
}
}
}


I've included the listed configuration files and jar from DSE package.

• cassandra.yaml
• core-site.xml
• dse.yaml

• cassandra-all-1.0.10.jar
• cassandra-clientutil-1.0.10.jar
• cassandra-thrift-1.0.10.jar
• commons-cli-1.1.jar
• commons-codec-1.2.jar
• commons-configuration-1.6.jar
• commons-lang-2.4.jar
• commons-logging-1.1.1.jar
• compress-lzf-0.8.4.jar
• dse.jar
• guava-r08.jar
• hadoop-core-1.0.2-dse-20120707.200359-5.jar
• libthrift-0.6.1.jar
• log4j-1.2.16.jar
• slf4j-api-1.6.1.jar
• snakeyaml-1.6.jar
• snappy-java-1.0.4.1.jar
• speed4j-0.9.jar

When I run the program, I get the following error

org.apache.thrift.TApplicationException: Internal error processing batch_mutate


I copied all the config files from a DSE machine and when I added them I get the following error.

Cannot locate conf/cassandra.yaml
Fatal configuration error; unable to start server. See log for stacktrace.


Could anyone please validate my approach and let me know whether this is possible?
Thanks.