[Bug 1422345] Re: stop being nice does not work

[Bug Watch Updater]

** Changed in: unattended-upgrades (Debian)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1422345

Title:
  stop being nice does not work

Status in unattended-upgrades package in Ubuntu:
  Fix Released
Status in unattended-upgrades source package in Trusty:
  Fix Released
Status in unattended-upgrades source package in Utopic:
  Fix Released
Status in unattended-upgrades package in Debian:
  Fix Released

Bug description:
  Test Case
  ---------
  1) Install apache2 from the -release pocket
  2) Run unattended-upgrades
  3) Observe apache2 running with a niceness of 19
  4) Downgrade apache2 to the version from the -release pocket
  5) Install the version of unattended-upgrades from -proposed
  6) Run unattended-upgrades
  7) Observe apache2 running with a niceness of 0 i.e. no niceness


  Since version 0.81, unattended-upgrades does the upgrade calculation with os.nice(19). To finish the nice block in /usr/bin/unattended-upgrade, the following call is used:
  os.nice(0)

  Since the argument is interpreted as incremental, this should be:
  os.nice(-19)

  Without this fix, this problem is back:
  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=701850
  "unattended-upgrades: nice 19/ionice idle inherited by restarted processes"

  Found in the trusty version (0.82.1ubuntu2), but probably in any
  version (including Debian) since 0.81.

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