Rebalance failed due to the timeout in bulk_set_vbucket_state operation with continuous view queries

Install couchbase server 2.0.0-1645 on 11 nodes
10.3.121.13
10.3.121.14
10.3.121.15
10.3.121.16
10.3.121.17
10.3.121.20
10.3.121.22
10.3.121.26
10.3.121.24
10.3.121.25
10.3.121.23
Create cluster 10 nodes
Create 2 buckets, default and saslbucket
Create 1 docs with 2 views per doc for each bucket
Load 7+ million items to default bucket and 1+ million items to saslbucket
Maintain load about 12 K ops on default bucket and 3 K ops on saslbucket
Continuously querying views on both buckets
Rebalance in and out node
Then do swap rebalance by add 3 nodes ( 24, 25 and 26) to cluster and remove 3 nodes (20, 22 and 23) out of cluster
After 3 minutes rebalance, rebalance failed with error


2012-08-29 01:03:09.578 ns_orchestrator:4:info:message(ns_1@10.3.121.13) - Starting rebalance, KeepNodes = ['ns_1@10.3.121.13','ns_1@10.3.121.14',
                                 'ns_1@10.3.121.15','ns_1@10.3.121.16',
                                 'ns_1@10.3.121.17','ns_1@10.3.121.24',
                                 'ns_1@10.3.121.25','ns_1@10.3.121.26'], EjectNodes = ['ns_1@10.3.121.20',
                                                                                       'ns_1@10.3.121.22',
                                                                                       'ns_1@10.3.121.23']

2012-08-29 01:03:09.893 ns_storage_conf:0:info:message(ns_1@10.3.121.24) - Deleting old data files of bucket "saslbucket"
2012-08-29 01:03:09.893 ns_storage_conf:0:info:message(ns_1@10.3.121.24) - Deleting old data files of bucket "default"
2012-08-29 01:03:09.896 ns_storage_conf:0:info:message(ns_1@10.3.121.26) - Deleting old data files of bucket "saslbucket"
2012-08-29 01:03:09.898 ns_storage_conf:0:info:message(ns_1@10.3.121.26) - Deleting old data files of bucket "default"
2012-08-29 01:03:09.942 ns_storage_conf:0:info:message(ns_1@10.3.121.25) - Deleting old data files of bucket "saslbucket"
2012-08-29 01:03:09.942 ns_storage_conf:0:info:message(ns_1@10.3.121.25) - Deleting old data files of bucket "default"
2012-08-29 01:03:13.771 ns_rebalancer:0:info:message(ns_1@10.3.121.13) - Started rebalancing bucket saslbucket
2012-08-29 01:03:14.794 ns_memcached:1:info:message(ns_1@10.3.121.26) - Bucket "saslbucket" loaded on node 'ns_1@10.3.121.26' in 0 seconds.
2012-08-29 01:03:14.820 ns_memcached:1:info:message(ns_1@10.3.121.24) - Bucket "saslbucket" loaded on node 'ns_1@10.3.121.24' in 0 seconds.
2012-08-29 01:03:14.831 ns_memcached:1:info:message(ns_1@10.3.121.25) - Bucket "saslbucket" loaded on node 'ns_1@10.3.121.25' in 0 seconds.
2012-08-29 01:03:16.674 ns_vbucket_mover:0:info:message(ns_1@10.3.121.13) - Bucket "saslbucket" rebalance appears to be swap rebalance
2012-08-29 01:06:21.275 ns_orchestrator:2:info:message(ns_1@10.3.121.13) - Rebalance exited with reason {{bulk_set_vbucket_state_failed,
                               [{'ns_1@10.3.121.20',
                                 {'EXIT',
                                  {{timeout,
                                    {gen_server,call,
                                     [timeout_diag_logger,
                                      {diag,
                                       {timeout,
                                        {gen_server,call,[ns_config,get]}}}]}},
                                   {gen_server,call,
                                    [{'janitor_agent-saslbucket',
                                      'ns_1@10.3.121.20'},
                                     {if_rebalance,<0.12846.432>,
                                      {update_vbucket_state,294,replica,
                                       undefined,undefined}},
                                     infinity]}}}}]},
                              [{janitor_agent,bulk_set_vbucket_state,4},
                               {ns_vbucket_mover,
                                update_replication_post_move,3},
                               {ns_vbucket_mover,handle_info,2},
                               {gen_server,handle_msg,5},
                               {proc_lib,init_p_do_apply,3}]}



Look at log on node 20 around 2012-08-29 01:06:21 before rebalance failed, see memcached connection closed by force

[ns_server:info,2012-08-29T1:05:49.620,ns_1@10.3.121.20:ns_config_rep:ns_config_rep:do_pull:341]Pulling config from: 'ns_1@10.3.121.22'

[ns_server:debug,2012-08-29T1:05:50.500,ns_1@10.3.121.20:'capi_ddoc_replication_srv-default':cb_generic_replication_srv:handle_info:144]doing replicate_newnodes_docs
[ns_server:debug,2012-08-29T1:05:50.656,ns_1@10.3.121.20:ns_config_rep:ns_config_rep:handle_call:113]Got full synchronization request from 'ns_1@10.3.121.13'
[ns_server:debug,2012-08-29T1:05:50.660,ns_1@10.3.121.20:ns_config_log:ns_config_log:log_common:111]config change:
buckets ->
[{configs,[{"default",
            [{map,[]},
             {fastForwardMap,[]},
             {uuid,<<"cdf4999f6920e2d4c3526e17f36c843f">>},
             {sasl_password,[]},
             {num_replicas,2},
             {replica_index,true},
             {ram_quota,3145728000},
             {auth_type,sasl},
             {autocompaction,false},
             {type,membase},
             {num_vbuckets,1024},
             {servers,['ns_1@10.3.121.13','ns_1@10.3.121.14',
                       'ns_1@10.3.121.15','ns_1@10.3.121.16',
                       'ns_1@10.3.121.17','ns_1@10.3.121.20',
                       'ns_1@10.3.121.22','ns_1@10.3.121.23']}]},
           {"saslbucket",
            [{map,[{202,
                    ['ns_1@10.3.121.15','ns_1@10.3.121.22','ns_1@10.3.121.16'],
                    ['ns_1@10.3.121.15','ns_1@10.3.121.25',
                     'ns_1@10.3.121.16']}]},
             {fastForwardMap,[]},
             {uuid,<<"9f1fdb211536936b49c8a392e079ecb0">>},
             {num_replicas,2},
             {replica_index,true},
             {ram_quota,3145728000},
             {auth_type,sasl},
             {sasl_password,"password"},
             {autocompaction,false},
             {type,membase},
             {num_vbuckets,1024},
             {servers,['ns_1@10.3.121.13','ns_1@10.3.121.14',
                       'ns_1@10.3.121.15','ns_1@10.3.121.16',
                       'ns_1@10.3.121.17','ns_1@10.3.121.24',
                       'ns_1@10.3.121.25','ns_1@10.3.121.26',
                       'ns_1@10.3.121.20','ns_1@10.3.121.22',
                       'ns_1@10.3.121.23']}]}]}]
[ns_server:debug,2012-08-29T1:05:50.660,ns_1@10.3.121.20:ns_config_rep:ns_config_rep:handle_call:119]Fully synchronized config in 458 us
[ns_server:info,2012-08-29T1:05:50.857,ns_1@10.3.121.20:ns_port_memcached:ns_port_server:log:169]memcached<0.506.0>: Wed Aug 29 08:05:50.552220 3: TAP (Producer) eq_tapq:replication_building_272_'ns_1@10.3.121.17' - disconnected, keep alive for 300 seconds
memcached<0.506.0>: Wed Aug 29 08:05:50.623620 3: TAP (Producer) eq_tapq:replication_building_272_'ns_1@10.3.121.13' - disconnected, keep alive for 300 seconds

[ns_server:debug,2012-08-29T1:05:50.902,ns_1@10.3.121.20:'capi_ddoc_replication_srv-default':cb_generic_replication_srv:handle_info:144]doing replicate_newnodes_docs
[ns_server:error,2012-08-29T1:05:51.136,ns_1@10.3.121.20:<0.16154.0>:ns_memcached:verify_report_long_call:274]call {stats,<<>>} took too long: 1276102 us
[ns_server:error,2012-08-29T1:05:51.136,ns_1@10.3.121.20:'ns_memcached-saslbucket':ns_memcached:handle_info:594]handle_info(ensure_bucket,..) took too long: 809713 us
[stats:warn,2012-08-29T1:05:51.387,ns_1@10.3.121.20:<0.16160.0>:stats_collector:latest_tick:201]Dropped 1 ticks
[ns_server:info,2012-08-29T1:05:52.779,ns_1@10.3.121.20:ns_port_memcached:ns_port_server:log:169]memcached<0.506.0>: Wed Aug 29 08:05:52.492646 3: TAP (Producer) eq_tapq:replication_building_272_'ns_1@10.3.121.24' - Connection is closed by force.


Link to diags of all nodes
https://s3.amazonaws.com/packages.couchbase/diag-logs/large_cluster_2_0/11nodes-1645-memchaced-close-connection-by-force-20120829.tgz