<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;">Here’s <a href="https://gist.github.com/nchammas/a4c9873d8158c323796e9b47c064e63a#file-adig-ahost-txt">the output of adig and ahost</a>, both with and without the DNS servers set directly on the network interface (vs. just on the router).<div><br></div><div>I also learned that gRPC 1.60.0 may be using <a href="https://github.com/grpc/grpc/tree/v1.60.0/third_party/cares">c-ares 1.19.1</a>, though again that’s just via looking at the gRPC source and not via some runtime query.</div><div><br id="lineBreakAtBeginningOfMessage"><div><br><blockquote type="cite"><div>On Jan 21, 2024, at 7:34 AM, Brad House <brad@brad-house.com> wrote:</div><br class="Apple-interchange-newline"><div>
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<div><p>I think homebrew distributes the 'adig' and 'ahost' utilities
from c-ares. Can you try using those to do the same lookup so we
can see the results?<br>
</p>
<div class="moz-cite-prefix">On 1/19/24 11:01 AM, Nicholas Chammas
wrote:<br>
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<div>On Jan 17, 2024, at 3:38 PM, Brad House
<a class="moz-txt-link-rfc2396E" href="mailto:brad@brad-house.com"><brad@brad-house.com></a> wrote:</div>
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<div><p>What version of c-ares is installed?</p>
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<div>Sorry about the delay in responding. Answering this
question is more difficult than I expected.</div>
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<div>I know that Spark Connect is running gRPC 1.160.0. Looking
through the gRPC repo, I see mention of <a href="https://github.com/grpc/grpc/blob/v1.60.0/cmake/cares.cmake#L42" moz-do-not-send="true">c-ares 1.13.0</a>, but I don’t know
how that translates to my runtime. Homebrew tells me I have
c-ares 1.25.0 installed, but again, I’m not sure if that’s
what I’m actually running.</div>
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<div>Is there a way I can directly query the version of c-ares
being run via Spark Connect / gRPC? I asked <a href="https://groups.google.com/g/grpc-io/c/3tZCa48Xvh8" moz-do-not-send="true">this question on the gRPC forum</a> but
no response yet.</div>
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<div>For the record, I know that c-ares is involved because if I
tell gRPC to not use it (via <a href="https://github.com/grpc/grpc/blob/b34d98fbd47834845e3f9cdaa4aa706f1aa4eddb/doc/environment_variables.md" moz-do-not-send="true">GRPC_DNS_RESOLVER=native</a>) then my
problem disappears.</div>
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<div><p>What DNS servers are configured on your MacOS system
when its not operating properly? The output of "scutil
--dns" would be helpful here.<br>
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<a href="https://gist.github.com/nchammas/a4c9873d8158c323796e9b47c064e63a#file-scutil-dns-txt" moz-do-not-send="true">Here’s that output.</a> I believe
192.168.1.1 is just my local router, and on there is where I have
the default DNS servers set to 1.1.1.1 and 1.0.0.1.
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