[windows]rebalance was not stopped after 30 seconds after it was triggered

http://qa.hq.northscale.net/job/windows_rebalance_regression_P1/42/consoleFull

/testrunner -i /tmp/windows_rebalance_regression_P1.ini get-cbcollect-info=True,EXCLUDE_GROUP=NOT_WIND -t rebalance.rebalanceinout.RebalanceInOutTests.start_stop_rebalance_in_out,nodes_init=4,nodes_in=1,nodes_out=1,extra_nodes_in=1,extra_nodesstart_stop_rebalance_in_out (rebalance.rebalanceinout.RebalanceInOutTests) ... _out=2,replicas=3,items=1000000,max_verify=100000

[2013-06-08 19:28:39,784] - [rest_client:1031] INFO - rebalance percentage : 19.921875 %
[2013-06-08 19:28:41,792] - [rest_client:1031] INFO - rebalance percentage : 19.921875 %
[2013-06-08 19:28:43,816] - [rest_client:1031] INFO - rebalance percentage : 19.921875 %
[2013-06-08 19:28:45,863] - [rest_client:1031] INFO - rebalance percentage : 20.0 %
[2013-06-08 19:28:46,544] - [rest_client:1031] INFO - rebalance percentage : 20.0 %
[2013-06-08 19:28:47,863] - [rest_client:75] INFO - rebalance reached >20.0% in 1306.91586304 seconds
[2013-06-08 19:28:47,989] - [rest_client:1408] WARNING - rebalance is not stopped yet after 1 sec
[2013-06-08 19:28:48,997] - [rest_client:1408] WARNING - rebalance is not stopped yet after 2 sec
[2013-06-08 19:28:50,007] - [rest_client:1408] WARNING - rebalance is not stopped yet after 3 sec
[2013-06-08 19:28:51,017] - [rest_client:1408] WARNING - rebalance is not stopped yet after 4 sec
[2013-06-08 19:28:52,040] - [rest_client:1408] WARNING - rebalance is not stopped yet after 5 sec
[2013-06-08 19:28:53,050] - [rest_client:1408] WARNING - rebalance is not stopped yet after 6 sec
[2013-06-08 19:28:54,061] - [rest_client:1408] WARNING - rebalance is not stopped yet after 7 sec
[2013-06-08 19:28:55,073] - [rest_client:1408] WARNING - rebalance is not stopped yet after 8 sec
[2013-06-08 19:28:56,084] - [rest_client:1408] WARNING - rebalance is not stopped yet after 9 sec
[2013-06-08 19:28:56,560] - [rest_client:1031] INFO - rebalance percentage : 20.15625 %
[2013-06-08 19:28:57,094] - [rest_client:1408] WARNING - rebalance is not stopped yet after 10 sec
[2013-06-08 19:28:58,102] - [rest_client:1408] WARNING - rebalance is not stopped yet after 11 sec
[2013-06-08 19:28:59,111] - [rest_client:1408] WARNING - rebalance is not stopped yet after 12 sec
[2013-06-08 19:29:00,120] - [rest_client:1408] WARNING - rebalance is not stopped yet after 13 sec
[2013-06-08 19:29:01,131] - [rest_client:1408] WARNING - rebalance is not stopped yet after 14 sec
[2013-06-08 19:29:02,143] - [rest_client:1408] WARNING - rebalance is not stopped yet after 15 sec
[2013-06-08 19:29:03,152] - [rest_client:1408] WARNING - rebalance is not stopped yet after 16 sec
[2013-06-08 19:29:04,170] - [rest_client:1408] WARNING - rebalance is not stopped yet after 17 sec
[2013-06-08 19:29:05,180] - [rest_client:1408] WARNING - rebalance is not stopped yet after 18 sec
[2013-06-08 19:29:06,194] - [rest_client:1408] WARNING - rebalance is not stopped yet after 19 sec
[2013-06-08 19:29:07,203] - [rest_client:1408] WARNING - rebalance is not stopped yet after 20 sec
[2013-06-08 19:29:07,568] - [rest_client:1031] INFO - rebalance percentage : 20.3125 %

Traceback (most recent call last):
File "pytests/rebalance/rebalanceinout.py", line 166, in start_stop_rebalance_in_out
self.assertTrue(stopped, msg="unable to stop rebalance")
AssertionError: unable to stop rebalance

Alk, is there a requirement on time, how long to wait that rebalance stop?