I have a running Hadoop/HBase cluster.
When I want to change hadoop parameters without stopping the cluster, can I
use org.apache.hadoop.conf.Configuration API?
I wrote following java source, but it didn't do anything.
-------------------------
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
public class ChangeConf
{
public static void main(String[] args) throws Exception
{
Configuration conf = new Configuration();
conf.addResource(new
Path("/hadoop-0.18.1/conf/hadoop-default.xml"));
conf.addResource(new Path("/hadoop-0.18.1/conf/hadoop-site.xml"));
conf.setStrings("dfs.data.dir",
"/hadoop-data/data.dir","/data4/hadoop-data");
return;
}
}
----------------------------
Actually, I know I can use "decommission" to add more directory without
stopping whole cluster.
But I'm very confused "org.apache.hadoop.conf.Configuration" API.
Could anyone please let me know clearly?
