Dear Community 

Please advise. vCSA 6.7 constantly sends Error 21  Failed listing records from zone vsphere.local.... error 21

DNS Server works and nslookup allows to resolve names. DNS configured for 2 zones. And allows to  resolve names. 

Did not find  any descriptions in vmware documentation or even Google. May be somebody encountered such errors and and could advice remediation procedure

Regards, AntesMv