analyzing some intermittent connection problems between hubs tunneling we've found many connections in CLOSE_WAIT on our UIM Server (about 25000).
- We've 1 hub tunnel server connected to 24 hub tunnel client
- All nas probes located in tunnel client replicate alarms in one direction to nas probe located to tunnel server
- All Infrastructure Managers are connected to hub tunnel server
Analyzing CLOSE_WAIT connections we find that they are all assigned to NAS probe. Deactivating and activating again nas probe resolve the problem but after 2 days we've again many CLOSE_WAIT connections (about 14000).
NAS version 9.00
HUB version 7.93
Robot version 7.93HF5
This is a know issue and is resolved in the following NAS hotfixes
NAS 9.0 HF1
NAS 8.56 HF2
These can be downloaded from the UIM Hotfix Index