Get error "Error resolving address" only sometimes

[DeepHorizons]

We are running into an issue with this library. We have created a application that uses this library. Sometimes when we run the application it works as expected, but sometimes an exception is thrown with this message:

Error resolving address

If it doesn't work, it never resolves itself unless the application is restarted (and when it starts back up its a coin toss if it works or not). Looking over the code it seems this message comes from the cpprest/Casablanca library here but we have not been able to find out anything past that on the library end.

Things we have tested:

• Tested with (libazure: 5.0.0, cpprest: 2.8) and (libazure: 6.0.0, cpprest: 2.10.13) on Ubuntu 16.04
• Time is set right
• Doing a packet capture shows that when it doesn't work there are no packets being sent (as determined by tcpdump)
• We can connect to the internet and dig returns a response for the address being requested

Running with a debug build doesn't give us any more information. Is there something else we can do? Any ideas to try?

[EmmaZhu]

Hi @DeepHorizons,

From the error message, seems it's because the request cannot successfully connect to the server endpoint.
Could you share the protocol you were using (HTTP or HTTPS), and whether there's any proxy when you met this issue?

Thanks
Emma

[DeepHorizons]

Emma, We tried both HTTP and HTTPS and didn't see any difference, and we don't have a proxy configured. - Joshua Milas

…

On Thu, May 9, 2019 at 10:30 PM EmmaZhu-MSFT ***@***.***> wrote: Hi @DeepHorizons <https://github.com/DeepHorizons>, From the error message, seems it's because the request cannot successfully connect to the server endpoint. Could you share the protocol you were using (HTTP or HTTPS), and whether there's any proxy when you met this issue? Thanks Emma — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#259 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABKLJKNYG6R47XDK3O37OB3PUTM5TANCNFSM4HL6WZKA> .