tree 31691bba6a71a3908b7cbffcde9dfd429f7629bb
parent ece0fd13262e39eb983e0a28d9c98eba0d909152
author JArod <jarodwen@gmail.com> 1379478513 -0700
committer JArod <jarodwen@gmail.com> 1379478513 -0700

checkpoint: fixed a issue when introducing the HashMergeExcnahge but
have not compute its delivered property, which could cause a NPE when
its delivered property by other operator.