hadoop-glusterfs: Fix IndexOutOfBounds Exception

Fix IndexOutOfBounds Exception which is hit when one
of the replica pair is down. Problematic code existed
in assuming a uniform size for each replica in pathinfo
string.

Change-Id: I85377ba5549e0603fe86e8d787115004f50e0c6a
BUG: 808009
Signed-off-by: Venky Shankar <[email protected]>
Reviewed-on: http://review.gluster.com/3087
Tested-by: Gluster Build System <[email protected]>
Tested-by: M S Vishwanath Bhat <[email protected]>
Reviewed-by: M S Vishwanath Bhat <[email protected]>
Reviewed-by: Vijay Bellur <[email protected]>

Author: vshankar

Diff for: glusterfs-hadoop/0.20.2/src/main/java/org/apache/hadoop/fs/glusterfs/GlusterFSXattr.java

@@ -327,7 +327,6 @@ static BlockLocation[] getHints (HashMap<String, ArrayList<String>> vol,
                                 }
                         }
 
-                        rsize = replicas.get(0).size();
                         stripeSize = meta.get("block-size");
 
                         nrAllocs = (int) (((len - start) / stripeSize) + 1);
@@ -350,6 +349,8 @@ static BlockLocation[] getHints (HashMap<String, ArrayList<String>> vol,
                                         done = true;
                                 }
 
+                                rsize = replicas.get(counter).size();
+
                                 if (hnts == null)
                                         repl[allocCtr] = new GlusterFSBrickRepl(rsize, stripeStart, (stripeEnd - stripeStart));