[system test] "Target database out of sync" when load items at source

Environment:

• Source:
  Each node has 4 core CPU, 4GB RAM
  Install couchbase server 2.0.0-1976 on 2 node cluster
  2 nodes cluster using host name (not IP), one node with default data path and other node with custom data path
  Create 2 bucket, one default (2GB) with one replica and one sasl (1.1GB) bucket with 2 replica

• Destination:
  Each node has 4 core CPU, 4GB RAM
  Install couchbase server 2.0.0-1976 on 2 node cluster
  2 nodes cluster using IP, one node with default data path and other node with custom data path
  Create 2 bucket, one default (2GB) with one replica and one sasl (1.1GB) bucket with 2 replica

When load items to sasl bucket at source, I saw error at destination like

2013-02-04 15:21:59 - Error replicating vbucket 469: <<"Target database out of sync. Try to increase max_dbs_open at the target's server.">>
2013-02-04 15:21:59 - Error replicating vbucket 329: <<"Target database out of sync. Try to increase max_dbs_open at the target's server.">>
2013-02-04 15:21:59 - Error replicating vbucket 231: <<"Target database out of sync. Try to increase max_dbs_open at the target's server.">>
2013-02-04 15:21:56 - Error replicating vbucket 507: <<"Target database out of sync. Try to increase max_dbs_open at the target's server.">>
2013-02-04 15:21:55 - Error replicating vbucket 487: <<"Target database out of sync. Try to increase max_dbs_open at the target's server.">>
2013-02-04 15:21:54 - Error replicating vbucket 485: <<"Target database out of sync. Try to increase max_dbs_open at the target's server.">>
2013-02-04 15:21:53 - Error replicating vbucket 430: <<"Target database out of sync. Try to increase max_dbs_open at the target's server.">>
2013-02-04 15:21:53 - Error replicating vbucket 233: <<"Target database out of sync. Try to increase max_dbs_open at the target's server.">>
2013-02-04 15:21:53 - Error replicating vbucket 18: <<"Target database out of sync. Try to increase max_dbs_open at the target's server.">>
2013-02-04 15:21:49 - Error replicating vbucket 476: <<"Target database out of sync. Try to increase max_dbs_open at the target's server.">>

Diags will be uploaded soon