How could i handle RoutingTableImpl: Failed to route packet to JID

I’m trying to send custom iq packet to offline user.

I created plugin with IQHandler for “profile:cusom” namespace. But if target user is offline, it failed with :

RoutingTableImpl: Failed to route packet to JID: kos@mydomain.com/mobile packet: <iq from="test@mydomain.com/mobile" to="kos@mydomain.com/mobile" type="set"> <query xmlns="profile:custom" to="kos@mydomain.com/mobile" profile-action="action">... And Packet sent to unreachable address : <packet .../>

How could i handle this packet into my plugin ?