Stubby DNS server are changed again and again even if the round_robin_upstreams='0'

Thu Aug 31 06:53:38 2023 daemon.err stubby[2897]: [06:53:38.252800] STUBBY: 34.195.80.81                             : Conn opened: TLS - Opportunistic Profile
Thu Aug 31 06:53:47 2023 daemon.err stubby[2897]: [06:53:47.130219] STUBBY: 34.195.80.81                             : Conn closed: TLS - Resps=     1, Timeouts  =     0, Curr_auth =Success, Keepalive(ms)= 10000
Thu Aug 31 06:53:47 2023 daemon.err stubby[2897]: [06:53:47.130254] STUBBY: 34.195.80.81                             : Upstream   : TLS - Resps=    27, Timeouts  =     2, Best_auth =Success
Thu Aug 31 06:53:47 2023 daemon.err stubby[2897]: [06:53:47.130267] STUBBY: 34.195.80.81                             : Upstream   : TLS - Conns=    18, Conn_fails=     0, Conn_shuts=     18, Backoffs     =     0
Thu Aug 31 06:53:50 2023 daemon.err stubby[2897]: [06:53:50.142211] STUBBY: 44.194.59.83                             : Conn opened: TLS - Opportunistic Profile
Thu Aug 31 06:53:59 2023 daemon.err stubby[2897]: [06:53:59.100064] STUBBY: 44.194.59.83                             : Conn closed: TLS - Resps=     1, Timeouts  =     0, Curr_auth =Success, Keepalive(ms)= 10000
Thu Aug 31 06:53:59 2023 daemon.err stubby[2897]: [06:53:59.100098] STUBBY: 44.194.59.83                             : Upstream   : TLS - Resps=    33, Timeouts  =     4, Best_auth =Success
Thu Aug 31 06:53:59 2023 daemon.err stubby[2897]: [06:53:59.100112] STUBBY: 44.194.59.83                             : Upstream   : TLS - Conns=    23, Conn_fails=     0, Conn_shuts=     19, Backoffs     =     0
Thu Aug 31 06:54:00 2023 daemon.err stubby[2897]: [06:54:00.483966] STUBBY: 100.25.249.20                            : Conn opened: TLS - Opportunistic Profile
Thu Aug 31 06:54:10 2023 daemon.err stubby[2897]: [06:54:10.354949] STUBBY: 100.25.249.20                            : Conn closed: TLS - Resps=     3, Timeouts  =     0, Curr_auth =Success, Keepalive(ms)= 10000
Thu Aug 31 06:54:10 2023 daemon.err stubby[2897]: [06:54:10.354983] STUBBY: 100.25.249.20                            : Upstream   : TLS - Resps=    35, Timeouts  =     5, Best_auth =Success
Thu Aug 31 06:54:10 2023 daemon.err stubby[2897]: [06:54:10.354996] STUBBY: 100.25.249.20                            : Upstream   : TLS - Conns=    21, Conn_fails=     0, Conn_shuts=     19, Backoffs     =     0
Thu Aug 31 06:54:13 2023 daemon.err stubby[2897]: [06:54:13.365225] STUBBY: 100.25.249.20                            : Conn opened: TLS - Opportunistic Profile
Thu Aug 31 06:54:22 2023 daemon.err stubby[2897]: [06:54:22.275697] STUBBY: 100.25.249.20                            : Conn closed: TLS - Resps=     1, Timeouts  =     0, Curr_auth =Success, Keepalive(ms)= 10000
Thu Aug 31 06:54:22 2023 daemon.err stubby[2897]: [06:54:22.275730] STUBBY: 100.25.249.20                            : Upstream   : TLS - Resps=    36, Timeouts  =     5, Best_auth =Success
Thu Aug 31 06:54:22 2023 daemon.err stubby[2897]: [06:54:22.275744] STUBBY: 100.25.249.20                            : Upstream   : TLS - Conns=    22, Conn_fails=     0, Conn_shuts=     20, Backoffs     =     0
Thu Aug 31 06:54:25 2023 daemon.err stubby[2897]: [06:54:25.286466] STUBBY: 34.195.80.81                             : Conn opened: TLS - Opportunistic Profile
Thu Aug 31 06:54:34 2023 daemon.err stubby[2897]: [06:54:34.220355] STUBBY: 34.195.80.81                             : Conn closed: TLS - Resps=     1, Timeouts  =     0, Curr_auth =Success, Keepalive(ms)= 10000
Thu Aug 31 06:54:34 2023 daemon.err stubby[2897]: [06:54:34.220390] STUBBY: 34.195.80.81                             : Upstream   : TLS - Resps=    28, Timeouts  =     2, Best_auth =Success
Thu Aug 31 06:54:34 2023 daemon.err stubby[2897]: [06:54:34.220403] STUBBY: 34.195.80.81                             : Upstream   : TLS - Conns=    19, Conn_fails=     0, Conn_shuts=     19, Backoffs     =     0
Thu Aug 31 06:54:37 2023 daemon.err stubby[2897]: [06:54:37.233295] STUBBY: 44.194.59.83                             : Conn opened: TLS - Opportunistic Profile
Thu Aug 31 06:54:46 2023 daemon.err stubby[2897]: [06:54:46.224247] STUBBY: 44.194.59.83                             : Conn closed: TLS - Resps=     1, Timeouts  =     0, Curr_auth =Success, Keepalive(ms)= 10000
Thu Aug 31 06:54:46 2023 daemon.err stubby[2897]: [06:54:46.224281] STUBBY: 44.194.59.83                             : Upstream   : TLS - Resps=    34, Timeouts  =     4, Best_auth =Success
Thu Aug 31 06:54:46 2023 daemon.err stubby[2897]: [06:54:46.224294] STUBBY: 44.194.59.83                             : Upstream   : TLS - Conns=    24, Conn_fails=     0, Conn_shuts=     20,

Is there a question here?

How to avoid the DNS resolver changes?

Stubby(v0.2.6)DNS resolvers are changed again and again even if the round_robin_upstreams='0' · Issue #346 · getdnsapi/stubby (github.com) <-- is this your post? If so, I'd advise waiting for a response from the Stubby developers. If not, then I'd advise adding to the existing post on GitHub.

It's not something that we are likely to be able to answer here.

Thanks, will wait for Stubby developer's response.