How to diagnose the issue

From: Shawn Cao via curl-library <curl-library_at_lists.haxx.se>
Date: Thu, 24 Mar 2022 11:11:37 -0700

Hey,

I'm using curl lib in my C++ application, running on a Mac laptop, here is
what I saw, and looking for help on how to diagnose the root cause.

*Version:* curl 7.79.1 (x86_64-apple-darwin21.0) libcurl/7.79.1
(SecureTransport) LibreSSL/3.3.5 zlib/1.2.11 nghttp2/1.45.1 Release-Date:
2021-09-22
*OS: *Apple M1 MacBook Pro (13-inch, M1, 2020)
*Code: *
https://github.com/varchar-io/nebula/blob/master/src/storage/http/Http.cpp
*Issue Observed: *
After the application starts (on my laptop), everything looks fine, running
pretty reliable.
After some time (not sure how long, at least a few hours, or the laptop may
sleep and wake up during the time), "curl_easy_perform" starts to return
CODE 28 (operation_timeout), so I added some debug info through
"curl_easy_getinfo"
Here are some values printed when it fails:
E0324 11:08:01.650840 1882091520 Http.cpp:189] Failed to read URL:
https://api.rs2.usw2.rockset.com/v1/orgs/self/ws/commons/lambdas/TweetsBetween/tags/latest;
Code=28
I0324 11:08:01.650871 1882091520 Http.cpp:141] [Curl-Info]: response
code=0, error number=0, time=(total=299.999, dns=0.018542, conn=0,
app-conn=0), num-conn=0, ssl-verify=0, download-size=0, url=
https://api.rs2.usw2.rockset.com/v1/orgs/self/ws/commons/lambdas/TweetsBetween/tags/latest

If I restart the application from this point, it starts working well again.
How do I diagnose this issue? Appreciate your input!

Thanks,
Shawn

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Received on 2022-03-24