[Bug 1214634] Re: Curl libs not compiled with the threaded resolver enabled

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: curl (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1214634

Title:
  Curl libs not compiled with the threaded resolver enabled

Status in “curl” package in Ubuntu:
  Confirmed

Bug description:
  This was discovered on precise but a quick look at other builds shows
  that the threaded resolver is not enabled on any of Ubuntu's
  distributions.

  According to the build log for precise both c-ares and threaded-resolver are disabled in the build:
  https://launchpadlibrarian.net/143580402/buildlog_ubuntu-precise-amd64.curl_7.22.0-3ubuntu4.2_UPLOADING.txt.gz

  This can cause an issue with threaded daemons that use libcurl to do
  network calls.  In perticular we are seeing collectd with the apache
  plugin installed hang on 15% of servers during startup.  Since
  collectd is multithreaded it turns off signals when using libcurl.
  Without one of the threading mechanisms enabled in libcurl, there is a
  chance that a timeout occures but can not be picked up by collectd
  because signals are turned off.  This in turn causes collectd to get
  stuck in the resolution phase with the only way to fix it is to kill
  -9 and restart.

  Please add --enable-threaded-resolver to the build.

  Thanks

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