[system test] warmup access log corrupt during warmup in windows

Environment:
9 nodes windows server 2008 R2 64-bit
Each node has 8GB RAM, 40+ GB SSD

Cluster:
Create 7 nodes cluster from nodes below
1:10.3.121.173
2:10.3.121.169
3:10.3.121.171
4:10.3.3.214
5:10.3.121.47
6:10.3.3.180
7:10.3.3.181

8:10.3.3.182
9:10.3.121.243

Create 2 buckets:
default: 3GB, 1 replica, replica index enable
saslbucket: 3GB, 1 replica, replica index disable

Run tests kv only using specification from http://hub.internal.couchbase.com/confluence/display/QA/views+%28and+now+with+XDCR%29+tests

At warm up phase (stop and restart couchbase server on node 10.3.121.243), monitor the warmup process
Check the wamup status of this node and see access_log is corrupted as below

$ /cygdrive/c/Program\ Files/Couchbase/Server/bin/cbstats.exe localhost:11210 raw warmup
ep_warmup: enabled
ep_warmup_access_log: corrupt
ep_warmup_dups: 0
ep_warmup_estimate_time: 28569
ep_warmup_estimated_key_count: 3828057
ep_warmup_estimated_value_count: 3828057
ep_warmup_item_expired: 0
ep_warmup_key_count: 3828057
ep_warmup_keys_time: 45952020
ep_warmup_min_item_threshold: 100
ep_warmup_min_memory_threshold: 100
ep_warmup_oom: 0
ep_warmup_state: done
ep_warmup_thread: complete
ep_warmup_time: 131417617
ep_warmup_value_count: 3804872

Administrator@WIN-5IC1JB7LHUB ~
$ /cygdrive/c/Program\ Files/Couchbase/Server/bin/cbstats.exe localhost:11210 raw warmup -b saslbucket -p password
ep_warmup: enabled
ep_warmup_access_log: corrupt
ep_warmup_dups: 0
ep_warmup_estimate_time: 40933
ep_warmup_estimated_key_count: 23217866
ep_warmup_estimated_value_count: 23217866
ep_warmup_item_expired: 0
ep_warmup_key_count: 23217866
ep_warmup_keys_time: 243091809
ep_warmup_min_item_threshold: 100
ep_warmup_min_memory_threshold: 100
ep_warmup_oom: 0
ep_warmup_state: done
ep_warmup_thread: complete
ep_warmup_time: 243243953
ep_warmup_value_count: 1

Link to manifest file http://builds.hq.northscale.net/latestbuilds/couchbase-server-enterprise_x86_64_2.0.2-802-rel.setup.exe.manifest.xml

Link to cbcollect_info of all nodes https://s3.amazonaws.com/packages.couchbase/collect_info/2_0_2/2013_05/9ndoes_202-802_access-log-corrupt_at_warmup_20130515-125236.tgz