Public bug reported:

The test_regression_testsuite in ubuntu_qrt_apparmor test constantly
fails on Azure 4.13 Standard-A0 node (passed on the other nodes).

Run parser regression tests ... (Applying patch 
r3446-fix-sysctl-syscall-detection.patch) (Applying patch 
tests-readdir-lp1674245.patch) (Applying patch tests-max_path-lp1692543.patch) 
(Applying patch r3701-tests-pivot_root.patch) (Applying patch 
r3702-tests-query_label.patch) ok
test_regression_testsuite (__main__.ApparmorTestsuites)
  preparing apparmor_2.10.95-0ubuntu2.9.dsc...  done
 ERROR  ubuntu_qrt_apparmor.test-apparmor.py    
ubuntu_qrt_apparmor.test-apparmor.py    timestamp=1524115809    localtime=Apr 
19 05:30:09       Test subprocess failed rc=9
 END ERROR      ubuntu_qrt_apparmor.test-apparmor.py    
ubuntu_qrt_apparmor.test-apparmor.py    timestamp=1524115826    localtime=Apr 
19 05:30:26
Persistent state client._record_indent now set to 1
Persistent state client.unexpected_reboot deleted
END GOOD        ----    ----    timestamp=1524115851    localtime=Apr 19 
05:30:51

Not sure if it's because of insufficient memory:
$ free -m
              total        used        free      shared  buff/cache   available
Mem:            647         251          59           2         336         225
Swap:             0           0           0

If you execute the "ubuntu-bug linux" command after this test, it will trigger 
an OOM event on it.
Please find the dmesg output here: http://paste.ubuntu.com/p/dH7mf5Vnzs/

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.13.0-1012-azure 4.13.0-1012.15
ProcVersionSignature: User Name 4.13.0-1012.15-username 4.13.13
Uname: Linux 4.13.0-1012-azure x86_64
ApportVersion: 2.20.1-0ubuntu2.16
Architecture: amd64
Date: Thu Apr 19 06:27:08 2018
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: linux-azure
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: qa-regression-testing
     Importance: Undecided
         Status: New

** Affects: linux-azure (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug uec-images xenial

** Description changed:

  The test_regression_testsuite in ubuntu_qrt_apparmor test constantly
- fails on Azure 4.13 Standard-A0 node.
+ fails on Azure 4.13 Standard-A0 node (passed on the other nodes).
  
  Run parser regression tests ... (Applying patch 
r3446-fix-sysctl-syscall-detection.patch) (Applying patch 
tests-readdir-lp1674245.patch) (Applying patch tests-max_path-lp1692543.patch) 
(Applying patch r3701-tests-pivot_root.patch) (Applying patch 
r3702-tests-query_label.patch) ok
  test_regression_testsuite (__main__.ApparmorTestsuites)
-   preparing apparmor_2.10.95-0ubuntu2.9.dsc...  done
-       ERROR   ubuntu_qrt_apparmor.test-apparmor.py    
ubuntu_qrt_apparmor.test-apparmor.py    timestamp=1524115809    localtime=Apr 
19 05:30:09       Test subprocess failed rc=9
-       END ERROR       ubuntu_qrt_apparmor.test-apparmor.py    
ubuntu_qrt_apparmor.test-apparmor.py    timestamp=1524115826    localtime=Apr 
19 05:30:26       
+   preparing apparmor_2.10.95-0ubuntu2.9.dsc...  done
+  ERROR        ubuntu_qrt_apparmor.test-apparmor.py    
ubuntu_qrt_apparmor.test-apparmor.py    timestamp=1524115809    localtime=Apr 
19 05:30:09       Test subprocess failed rc=9
+  END ERROR    ubuntu_qrt_apparmor.test-apparmor.py    
ubuntu_qrt_apparmor.test-apparmor.py    timestamp=1524115826    localtime=Apr 
19 05:30:26
  Persistent state client._record_indent now set to 1
  Persistent state client.unexpected_reboot deleted
  END GOOD      ----    ----    timestamp=1524115851    localtime=Apr 19 
05:30:51
  
- 
  Not sure if it's because of insufficient memory:
  $ free -m
-               total        used        free      shared  buff/cache   
available
+               total        used        free      shared  buff/cache   
available
  Mem:            647         251          59           2         336         
225
  Swap:             0           0           0
  
  If you execute the "ubuntu-bug linux" command after this test, it will 
trigger an OOM event on it.
  Please find the dmesg output here: http://paste.ubuntu.com/p/dH7mf5Vnzs/
  
  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.13.0-1012-azure 4.13.0-1012.15
  ProcVersionSignature: User Name 4.13.0-1012.15-username 4.13.13
  Uname: Linux 4.13.0-1012-azure x86_64
  ApportVersion: 2.20.1-0ubuntu2.16
  Architecture: amd64
  Date: Thu Apr 19 06:27:08 2018
  ProcEnviron:
-  TERM=xterm-256color
-  PATH=(custom, no user)
-  XDG_RUNTIME_DIR=<set>
-  LANG=en_US.UTF-8
-  SHELL=/bin/bash
+  TERM=xterm-256color
+  PATH=(custom, no user)
+  XDG_RUNTIME_DIR=<set>
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
  SourcePackage: linux-azure
  UpgradeStatus: No upgrade log present (probably fresh install)

** Also affects: qa-regression-testing
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1765302

Title:
  ubuntu_qrt_apparmor test will fail on Azure 4.13 Standard-A0

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