Disable Runtime exception if working directory doesn't exist or if mapred/system directory doesn't exist.

Both directories are needed for map/reduce however they aren't required for hadoop filesystem functions which are common during cluster setup absent of the full framework.

Author: childsb

src/main/java/org/apache/hadoop/fs/glusterfs/GlusterVolume.java

@@ -137,7 +137,7 @@ public void setConf(Configuration conf){
 
                 if(sameVolume(mapredSysDirectory) && !exists(mapredSysDirectory) ){
                  //   mkdirs(mapredSysDirectory);
-                    throw new RuntimeException("Error (mapred.system.dir/mapreduce.jobtracker.system.dir) does not exist: " + mapredSysDirectory);
+                    log.warn("mapred.system.dir/mapreduce.jobtracker.system.dir does not exist: " + mapredSysDirectory);
                 }
                 //Working directory setup
 
@@ -146,8 +146,9 @@ public void setConf(Configuration conf){
                     workingDirectory = new Path("/");
                 }else if( !exists(workingDirectory)){
                    // mkdirs(workingDirectory);
-                    throw new RuntimeException("Error working directory does not exist: " + workingDirectory);
+                    log.warn("working directory does not exist: " + workingDirectory);
                 }
+                
                 setWorkingDirectory(workingDirectory);