Hi,
Setup 1:Mongos
3:Config server
10: Mongodb with journal enable

While reading from mongos we got error "Fri Sep 7 16:50:08 [conn1121] ns: 00060912.Database could not initialize cursor across all shards because : stale config detected for ns: 00060912.Database ClusteredCursor::_checkCursor @ 192.168.11.103:10000 attempt: 0"

Log :

Fri Sep 7 16:50:08 [conn1121] ns: 00060912.Database could not initialize cursor across all shards because : stale config detected for ns: 00060912.Database ClusteredCursor::_checkCursor @ 192.168.11.103:10000 attempt: 0
Fri Sep 7 16:50:08 [conn1122] ns: 00060912.Database could not initialize cursor across all shards because : stale config detected for ns: 00060912.Database ClusteredCursor::_checkCursor @ 192.168.11.103:10000 attempt: 0
Fri Sep 7 16:50:08 [conn1122] ns: 00060912.Database could not initialize cursor across all shards because : stale config detected for ns: 00060912.Database ClusteredCursor::_checkCursor @ 192.168.11.103:10000 attempt: 1
Fri Sep 7 16:50:08 [conn1121] ns: 00060912.Database could not initialize cursor across all shards because : stale config detected for ns: 00060912.Database ClusteredCursor::_checkCursor @ 192.168.11.103:10000 attempt: 1
Fri Sep 7 16:50:09 [conn1122] ns: 00060912.Database could not initialize cursor across all shards because : stale config detected for ns: 00060912.Database ClusteredCursor::_checkCursor @ 192.168.11.103:10000 attempt: 2
Fri Sep 7 16:50:09 [conn1121] ns: 00060912.Database could not initialize cursor across all shards because : stale config detected for ns: 00060912.Database ClusteredCursor::_checkCursor @ 192.168.11.103:10000 attempt: 2
Fri Sep 7 16:50:11 [conn1123] ns: 00060912.Database could not initialize cursor across all shards because : stale config detected for ns: 00060912.Database ClusteredCursor::_checkCursor @ 192.168.11.103:10000 attempt: 0
Fri Sep 7 16:50:11 [conn1124] ns: 00060912.Database could not initialize cursor across all shards because : stale config detected for ns: 00060912.Database ClusteredCursor::_checkCursor @ 192.168.11.103:10000 attempt: 0
Fri Sep 7 16:50:11 [conn1123] ns: 00060912.Database could not initialize cursor across all shards because : stale config detected for ns: 00060912.Database ClusteredCursor::_checkCursor @ 192.168.11.103:10000 attempt: 1
Fri Sep 7 16:50:11 [conn1124] ns: 00060912.Database could not initialize cursor across all shards because : stale config detected for ns: 00060912.Database ClusteredCursor::_checkCursor @ 192.168.11.103:10000 attempt: 1

I have following question are:
1. Why does above error come??
2. does it take more then 3 second ?

How to resolve this error
Please help me
Regards,
JRV