DNS issue causing Vscan server disconnection on all nodes with no disconnect reason
Applies to
- ONTAP AV Connector
- ONTAP 9 and later
- All Antivirus solutions
- ONTAP AV Connector 1.0.4
Issue
- Vscan connection-status shows all nodes disconnected with no reason for disconnection.
cluster1::> vserver vscan connection-status show-all
Connection
Vserver Node Server Status Disconnect Reason
----------- ----------------- --------------- -------------- -----------------
vs1 Cluster-01 1.1.1.1 disconnected -
vs1 Cluster-02 2.2.2.2 disconnected -- AVSHIM logs indicate the below errors :
05/31/24-09:38:23.560Z Attempting reverse DNS lookup of 1.1.1.1
05/31/24-09:38:23.560Z Found host vs1.domain.local for IP 1.1.1.1
05/31/24-09:38:23.560Z vs1.domain.local resolves to multiple IP addresses; cannot use it.
05/31/24-09:38:23.560Z 1.1.1.1 could not be converted to a DNS name
05/31/24-09:38:23.571Z [Pipe: 1.1.1.1, ][r] CreateNamedPipe failed with 86. closingQ: [0]
05/31/24-09:37:59.350Z Attempting reverse DNS lookup of 2.2.2.2
05/31/24-09:37:59.350Z Found host vs1.domain.local for IP 2.2.2.2
05/31/24-09:37:59.350Z vs1.domain.local resolves to multiple IP addresses; cannot use it.
05/31/24-09:37:59.350Z 2.2.2.2 could not be converted to a DNS name
05/31/24-09:37:59.366Z [Pipe: 2.2.2.2, ][r] CreateNamedPipe failed with 86. closingQ: [0]
- nslookup for the LIF IP's returns the same DNS name.
C:\Windows\system32> nslookup 1.1.1.1
Server: UnKnown
Address: 10.1x.x0x.1x
Name: vs1.domain.local
Address: 1.1.1.1
C:\Windows\system32> nslookup 2.2.2.2
Server: UnKnown
Address: 10.1x.x0x.1x
Name: vs1.domain.local
Address: 2.2.2.2