swaprebalance.SwapRebalanceFailedTests.test_failed_swap_rebalance get stuck for build 1776 while rebalancing

Rebalance Hangs while doing following scenario:-
In a 8 node cluster
Load 100000 data item
Remove two nodes and then add them back,Run rebalance while data access runs parallel
Once rebalance reaches at 60% kill one node (master) and wait for it warmed up
Once warmup completed start rebalance,Rebalance get hang

2012-09-27 02:17:05,948 - root - INFO - rebalance reached >60.0512448634% in 145.019459963 seconds
2012-09-27 02:17:06,273 - root - INFO - creating direct client 10.3.121.92:11210 default
2012-09-27 02:17:07,074 - root - INFO - os:cmd("kill -9 11660 ")
2012-09-27 02:17:07,087 - root - INFO - /diag/eval status: True content: [] command: os:cmd("kill -9 11660 ")
2012-09-27 02:17:07,088 - root - INFO - killed 10.3.121.92:8091?? (True, '[]')
2012-09-27 02:17:07,117 - root - INFO - creating direct client 10.3.121.92:11210 default
2012-09-27 02:17:07,835 - root - ERROR - Could not get warmup_time stats from server 10.3.121.92:8091, exception 'ep_warmup_time'
2012-09-27 02:17:07,871 - root - INFO - creating direct client 10.3.121.92:11210 default
2012-09-27 02:17:08,591 - root - ERROR - Could not get warmup_time stats from server 10.3.121.92:8091, exception 'ep_warmup_time'
2012-09-27 02:17:08,623 - root - INFO - creating direct client 10.3.121.92:11210 default
2012-09-27 02:17:09,334 - root - INFO - ep_warmup_time is 1943373
2012-09-27 02:17:09,335 - root - INFO - Collected the stats 1943373 for server 10.3.121.92:8091
2012-09-27 02:17:09,362 - root - INFO - warmup completed, awesome!!! Warmed up. 0 items
2012-09-27 02:17:14,380 - root - INFO - rebalance params : password=password&ejectedNodes=ns_1%4010.3.121.93%2Cns_1%4010.3.121.94&user=Administrator&knownNodes=ns_1%4010.3.121.93%2Cns_1%4010.3.121.94%2Cns_1%4010.3.121.92%2Cns_1%4010.3.121.95%2Cns_1%4010.3.121.96
2012-09-27 02:17:14,395 - root - INFO - rebalance operation started
2012-09-27 02:17:14,417 - root - INFO - rebalance percentage : 0 %
2012-09-27 02:17:16,442 - root - INFO - rebalance percentage : 0.0 %
2012-09-27 02:17:18,498 - root - INFO - rebalance percentage : 0.0 %
2012-09-27 02:17:20,510 - root - INFO - rebalance percentage : 0.0 %
2012-09-27 02:17:22,523 - root - INFO - rebalance percentage : 0.0 %
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