** Description changed:

+ [Impact]
+ 
+  * This issue affects users of the release-upgrade feature of landscape.
+ 
+  * Landscape package monitor would previously race during an upgrade
+    and possibly grab apt locks, thus making the upgrade fail.
+ 
+  * The fix adds checks during package operations to make sure a
+    release upgrade is not in progresss.
+ 
+ [Test Case]
+ 
+  * in /etc/landscape/client.conf , set "apt_update_interval=1800" and 
+    "log_level=debug" and restart the client.
+  
+  * Launch a release upgrade from landscape-server. Look for messages
+    in the package-monitor logs stating "conditions not met"
+ 
+ [Regression Potential]
+ 
+  * Unlikely, as this has already been released to newer ubuntu releases
+    and is fairly well tested.
+ 
+  * Any issue with related changes would likely only affect the client
+    getting new package info, but won't affect other functionality.
+ 
+ [Original description]
+ 
  Affected release: Ubuntu 14.04.5
  Version of package: 14.12-0ubuntu5.14.04
  
  Steps to reproduce:
  1. Run do-release-upgrade to upgrade to 16.04.2.
  2. Trigger the package-reporter to kick in while do-release-upgrade is 
working but not having the package database locked.
  3. Package database is locked by package-reporter, do-release-upgrade fails 
to access it and exits.
  
  Expected result:
  Landscape detects that there's an release upgrade in progress and will wait 
for it to finish.
  
  Actual result:
  PackageReporter locks the apt database, do-release-upgrade cannot access it, 
exits with an error and may leave the system in an unusable state.
  
  * Link to Dariusz's PR on GitHub:
  https://github.com/CanonicalLtd/landscape-client/pull/14

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https://bugs.launchpad.net/bugs/1699179

Title:
  PackageReporter kicks in during do-release-upgrade

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