title: CURL - Intermittent Error 35 - Unknown SSL protocol error in connection
body: <p>I have a server running Rundeck to handle a large amount of various integration tasks.
  The scheduled tasks each make a curl request to a given URL on our intranet system - essentially Rundeck just runs a temporary bash script.</p>
  
  <p>About 99% of the time, this works fine - but we're seeing curl fail intermittently with Error 35: Unknown SSL protocol error in connection.</p>
  
  <p>I've tried specifying the ssl protocol explicitly, with a known-good protocol, but we're still experiencing the issue.</p>
  
  <p>We have a pretty high volume of requests going out - I'm not sure if that could have something to do with it.  There is a chance we could have ~3 curl processes running at any given time. </p>
  
  <p>Any advice would be appreciated.</p>
  
  <pre><code>curl --version
  curl 7.35.0 (x86_64-pc-linux-gnu) libcurl/7.35.0 OpenSSL/1.0.1f zlib/1.2.8 libidn/1.28 librtmp/2.3
  Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3     pop3s rtmp rtsp smtp smtps telnet tftp 
  Features: AsynchDNS GSS-Negotiate IDN IPv6 Largefile NTLM NTLM_WB SSL libz TLS-SRP 
  </code></pre>