[system test]: swap rebalance in online upgrade from 1.8.1 to 2.0.1-160 failed due to timeout ( erlang crash dump detected)

Do online upgrade in windows from 1.8.1 to 2.0.1-160

Create 4 nodes cluster with version 1.8.1. (system has 8GB RAM, use 6GB for buckets)
Load 10 M items to default bucket and 2 M items to sasl bucket
Create 2.0.1-160 node and do swap rebalance to remove one 1.8.1 node out of cluster
Rebalance failed due to time out on node with build 2.0.1

Rebalance exited with reason {timeout,
{gen_server,call,
[

{'ns_memcached-sasl', 'ns_1@win-1605.hq.couchbase.com'}

,

{set_vbucket,217,replica}

,
180000]}}
ns_orchestrator002 ns_1@win-1605.hq.couchbase.com 15:51:07 - Wed Feb 20, 2013
Node 'ns_1@10.3.2.75' saw that node 'ns_1@win-1605.hq.couchbase.com' came up. ns_node_disco004 ns_1@10.3.2.75 15:21:26 - Wed Feb 20, 2013
Node 'ns_1@10.3.2.77' saw that node 'ns_1@win-1605.hq.couchbase.com' came up. ns_node_disco004 ns_1@10.3.2.77 15:21:23 - Wed Feb 20, 2013
Node 'ns_1@10.3.2.76' saw that node 'ns_1@win-1605.hq.couchbase.com' came up. ns_node_disco004 ns_1@10.3.2.76 15:21:22 - Wed Feb 20, 2013
Started node add transaction by adding node 'ns_1@win-1605.hq.couchbase.com' to nodes_wanted
ns_cluster000 ns_1@10.3.2.76 15:21:21 - Wed Feb 20, 2013
Node 'ns_1@10.3.121.182' saw that node 'ns_1@win-1605.hq.couchbase.com' came up. ns_node_disco004 ns_1@10.3.121.182 15:21:14 - Wed Feb 20, 2013
Current master is older (before 2.0.1) and I'll try to takeover (repeated 1 times) mb_master000 ns_1@win-1605.hq.couchbase.com 15:20:57 - Wed Feb 20, 2013
Bucket "sasl" rebalance appears to be swap rebalance ns_vbucket_mover000 ns_1@win-1605.hq.couchbase.com 15:20:23 - Wed Feb 20, 2013
Bucket "sasl" loaded on node 'ns_1@win-1605.hq.couchbase.com' in 0 seconds. ns_memcached001 ns_1@win-1605.hq.couchbase.com 15:20:21 - Wed Feb 20, 2013
Started rebalancing bucket sasl ns_rebalancer000 ns_1@win-1605.hq.couchbase.com 15:20:20 - Wed Feb 20, 2013
Deleting old data files of bucket "default" ns_storage_conf000 ns_1@win-1605.hq.couchbase.com 15:20:10 - Wed Feb 20, 2013
Starting rebalance, KeepNodes = ['ns_1@win-1605.hq.couchbase.com',
'ns_1@10.3.2.76','ns_1@10.3.121.182',
'ns_1@10.3.2.75'], EjectNodes = ['ns_1@10.3.2.77']
ns_orchestrator004 ns_1@win-1605.hq.couchbase.com 15:20:10 - Wed Feb 20, 2013
Haven't heard from a higher priority node or a master, so I'm taking over. mb_master000 ns_1@win-1605.hq.couchbase.com 15:20:10 - Wed Feb 20, 2013
Node ns_1@win-1605.hq.couchbase.com joined cluster ns_cluster003 ns_1@win-1605.hq.couchbase.com 15:19:58 - Wed Feb 20, 2013
Couchbase Server has started on web port 8091 on node 'ns_1@win-1605.hq.couchbase.com'. menelaus_sup001 ns_1@win-1605.hq.couchbase.com 15:19:58 - Wed Feb 20, 2013
Current master is older (before 2.0.1) and I'll try to takeover mb_master000 ns_1@win-1605.hq.couchbase.com 15:19:58 - Wed Feb 20, 2013

Will add collect info files soon