[system test] backfill remaining shows overflow value

Install couchbase server 2.0.1-185 on 4 physical servers with 2 separated disks
Create a cluster with 3 nodes
10.2.1.61
10.2.1.62
10.2.1.63
Create 2 buckets: default (14GB) and sasl (10GB)
No view or xdcr created
Load 20+ million items to both bucket until resident ratio on both bucket around 90%
Access cluster in 3 hours with spec in this page http://hub.internal.couchbase.com/confluence/pages/viewpage.action?pageId=6785119
Add node 10.2.1.64 to cluster and rebalance.
Rebalance failed. Filed bug MB-7995
Rebalance again and rebalance hang. Filed bug MB-7996
Generate erlang dump and put it in bug MB-7996
Kill erlang.
Start rebalance again. During rebalance, monitor stats and see backfill remaining shows overflow value

Link to collect info file of all nodes https://s3.amazonaws.com/packages.couchbase/collect_info/2_0_1/201304/4phy-win-201_185-backfill-remaining-overflow-20130403-154125.tgz

Link to manifest file of the build http://builds.hq.northscale.net/latestbuilds/couchbase-server-community_x86_64_2.0.1-185-rel.setup.exe.manifest.xml