Comment 2 for bug 704015

A guess on how I would test it

1) Upload file A with length X (this writes it to replicas I, J, and K)

2) fail replica K

3) Upload file B with length Y (where X>Y) to the same object name (this writes to replicas I and J)

4) restore replica K

5) begin downloading the object from replica K

6) have replication copy from replica I or J to replica K while the client is downloading the object