There is no data in the NFA console for 1 router .
The last netflow field is not refreshed but a wireshark trace well gives good netflow data sent by this router .
The poller.routers table gives mapped for this router state .
After check , the poller.routers table have a not null reboottime value for this router .
We must update the mysql table :
update routers set reboottime=0 where id=xxx;
Changing the id with the right router value
Then restart the harvester service and wait 15 minutes .