On what OS/platform and which curl version? Can you show us the curl -V output?

If it is flaky, it is most likely because the servers you have are unreliable. curl's behavior is more set out to be the same every time.

Changing CURL_TIMEOUT_RESOLVE is really no solution, ever, and you'd only find advice to change that on unofficial sites where people try desperate things. curl allows a name resolve to take 5 minutes and if it takes any longer than so you have other problems.

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** [bugs:#1247] curl: (6) Couldn't resolve host**
**Status:** open
**Labels:** name resolving/DNS 
**Created:** Sat Jun 15, 2013 08:45 AM UTC by Robert
**Last Updated:** Sat Jun 15, 2013 08:45 AM UTC
**Owner:** Daniel Stenberg
hello, I use curl command line under centos, many time and for many websites, the first time I use curl, it will return curl: (6) Couldn't resolve host 'www.....com', then I try the second time, it can work fine, why?
I search on the Internet, someone talk about need to change CURL_TIMEOUT_RESOLVE in the code, but I use the curl command line, how to do this?
thanks.
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