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[James Page <james.page@xxxxxxxxxx>]

** No longer affects: nova (Ubuntu)

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https://bugs.launchpad.net/bugs/1053364

Title:
  Add SIGPIPE handler to subprocess execution in rootwrap and
  utils.execute

Status in Cinder:
  Fix Released
Status in Cinder folsom series:
  Fix Released
Status in OpenStack Neutron (virtual network service):
  Fix Released
Status in neutron folsom series:
  Fix Released
Status in OpenStack Compute (Nova):
  Fix Released
Status in OpenStack Compute (nova) folsom series:
  Fix Released
Status in “quantum” package in Ubuntu:
  Fix Released
Status in “cinder” source package in Quantal:
  Fix Released
Status in “nova” source package in Quantal:
  Fix Released
Status in “quantum” source package in Quantal:
  Fix Released

Bug description:
  As explained here:
  http://www.chiark.greenend.org.uk/ucgi/~cjwatson/blosxom/2009-07-02
  -python-sigpipe.html

  Python ignores SIGPIPE on startup, because it prefers to check every
  write and raise an IOError exception rather than taking the signal.
  This is all well and good for Python itself, but most Unix
  subprocesses don't expect to work this way. Thus, when you are
  creating subprocesses from Python, it is very important to set SIGPIPE
  back to the default action. Before I realised this was necessary, I
  wrote code that caused serious data loss due to a child process
  carrying on out of control after its parent process died!

  Our execution stuff should make use of that.

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