Symptoms:
- Virtual machines might lose network connectivity
- We see slot 4 filter going in IOChain Detaching state in the output of the summarize-dvfilter command for problematic VM
Note: It can affect any slot which is using a slowpath agent
[root@test:~] summarize-dvfilter
port 50331659 VMNAME.eth0
vNic slot 2
name: nic-2104945-eth0-vmware-sfw.2
agentName: vmware-sfw
state: IOChain Attached
vmState: Attached
failurePolicy: failClosed
serviceVMID: 2
filter source: Dynamic Filter Creation
vNic slot 4
name: nic-2104945-eth0-serviceinstance-6.4
agentName: serviceinstance-6
state: IOChain Detaching>>>>>>>>>filter is in detaching state
vmState: Attached
failurePolicy: failClosed
serviceVMID: 5
In the vmkernel logs of the ESXi host you will see below logs:
2020-09-14T04:18:34.269Z cpu23:2102063)Found the map entry for key nic-2104945-eth0-serviceinstance-6.4
2020-09-14T04:18:34.269Z cpu23:2102063)Map already exists for given key (nic-2104945-eth0-serviceinstance-6.4)
2020-09-14T04:18:34.288Z cpu23:2102063)Profile id = serviceprofile-7
2020-09-14T04:18:34.288Z cpu23:2102063)Instance id = serviceinstance-6
2020-09-14T04:18:34.288Z cpu23:2102063)Filter Name = nic-2104945-eth1-serviceinstance-6.4
2020-09-14T04:18:34.288Z cpu23:2102063)Found the map entry for key nic-2104945-eth1-serviceinstance-6.4
2020-09-14T04:18:34.288Z cpu23:2102063)Map already exists for given key (nic-2104945-eth1-serviceinstance-6.4)
2020-09-14T04:18:34.312Z cpu23:2102063)DVFilter: 5667: Filter 'nic-2104945-eth0-serviceinstance-6.4' on port 300000b still has refcount: 2, aborting>>>>>>>>>>>