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From slebre...@apache.org
Subject svn commit: r1136006 - in /cassandra/branches/cassandra-0.8: CHANGES.txt src/java/org/apache/cassandra/utils/MerkleTree.java
Date Wed, 15 Jun 2011 11:55:28 GMT
Author: slebresne
Date: Wed Jun 15 11:55:28 2011
New Revision: 1136006

URL: http://svn.apache.org/viewvc?rev=1136006&view=rev
Log:
Avoids infinite loop when initializing a merkle tree
patch by slebresne; reviewed by stuhood for CASSANDRA-2758

Modified:
    cassandra/branches/cassandra-0.8/CHANGES.txt
    cassandra/branches/cassandra-0.8/src/java/org/apache/cassandra/utils/MerkleTree.java

Modified: cassandra/branches/cassandra-0.8/CHANGES.txt
URL: http://svn.apache.org/viewvc/cassandra/branches/cassandra-0.8/CHANGES.txt?rev=1136006&r1=1136005&r2=1136006&view=diff
==============================================================================
--- cassandra/branches/cassandra-0.8/CHANGES.txt (original)
+++ cassandra/branches/cassandra-0.8/CHANGES.txt Wed Jun 15 11:55:28 2011
@@ -56,6 +56,7 @@
  * fix ConcurrentModificationException in repair when dealing with 0.7 node
    (CASSANDRA-2767)
  * use threadsafe collections for StreamInSession (CASSANDRA-2766)
+ * avoid infinite loop when creating merkle tree (CASSANDRA-2758)
 
 
 0.8.0-final

Modified: cassandra/branches/cassandra-0.8/src/java/org/apache/cassandra/utils/MerkleTree.java
URL: http://svn.apache.org/viewvc/cassandra/branches/cassandra-0.8/src/java/org/apache/cassandra/utils/MerkleTree.java?rev=1136006&r1=1136005&r2=1136006&view=diff
==============================================================================
--- cassandra/branches/cassandra-0.8/src/java/org/apache/cassandra/utils/MerkleTree.java (original)
+++ cassandra/branches/cassandra-0.8/src/java/org/apache/cassandra/utils/MerkleTree.java Wed
Jun 15 11:55:28 2011
@@ -178,8 +178,11 @@ public class MerkleTree implements Seria
             return new Leaf();
         Token midpoint = partitioner.midpoint(left, right);
 
-        Hashable lchild = midpoint.equals(left) ? new Leaf() : initHelper(left, midpoint,
inc(depth), max);
-        Hashable rchild =  midpoint.equals(right) ? new Leaf() : initHelper(midpoint, right,
inc(depth), max);
+        if (midpoint.equals(left) || midpoint.equals(right))
+            return new Leaf();
+
+        Hashable lchild =  initHelper(left, midpoint, inc(depth), max);
+        Hashable rchild =  initHelper(midpoint, right, inc(depth), max);
         return new Inner(midpoint, lchild, rchild);
     }
 



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