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[Bug 1778642] Re: ubuntu_lttng_smoke_test failed on Azure 4.15

 

** Also affects: lttng-modules (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Also affects: linux-azure (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: linux-azure (Ubuntu Xenial)
       Status: New => Invalid

** Changed in: lttng-modules (Ubuntu Xenial)
       Status: New => In Progress

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https://bugs.launchpad.net/bugs/1778642

Title:
  ubuntu_lttng_smoke_test failed on Azure 4.15

Status in lttng-modules:
  New
Status in ubuntu-kernel-tests:
  Invalid
Status in linux-azure package in Ubuntu:
  Invalid
Status in lttng-modules package in Ubuntu:
  In Progress
Status in linux-azure source package in Xenial:
  Invalid
Status in lttng-modules source package in Xenial:
  In Progress
Status in linux-azure source package in Bionic:
  Invalid
Status in lttng-modules source package in Bionic:
  In Progress
Status in linux-azure source package in Cosmic:
  Invalid
Status in lttng-modules source package in Cosmic:
  In Progress

Bug description:
  ***THIS IS A POTENTIAL REGRESSION***

  This test will pass with the older kernel, 4.15.0-1013-azure, but not
  the 4.15.0-1014-azure in -proposed.

  It looks like the kernel module can be installed, but four tests have
  failed:

  == lttng smoke test of session create/destroy ==
  Session test-kernel-session created.
  Traces will be written in /tmp/lttng-kernel-trace-14716-session
  PASSED (lttng create)
  Session test-kernel-session destroyed
  PASSED (lttng destroy)

  == lttng smoke test list kernel events ==
  FAILED (lttng list --kernel)
  FAILED (lttng list --kernel more output expected)

  == lttng smoke test trace open/close system calls ==
  Session test-kernel-session created.
  Traces will be written in /tmp/lttng-kernel-trace-14716-session
  PASSED (lttng create)
  FAILED (lttng enable-event)
  Session test-kernel-session destroyed

  == lttng smoke test trace context switches ==
  Session test-kernel-session created.
  Traces will be written in /tmp/lttng-kernel-trace-14716-session
  PASSED (lttng create)
  FAILED (lttng enable-event)
  Session test-kernel-session destroyed

  Summary: 4 passed, 4 failed

  http://10.246.72.46/4.15.0-1014.14-azure/bionic-linux-azure-
  azure-4.15.0-Standard_D12-ubuntu_lttng_smoke_test/ubuntu_lttng_smoke_test/results/ubuntu_lttng_smoke_test
  .lttng-smoke-test/debug/ubuntu_lttng_smoke_test.lttng-smoke-
  test.DEBUG.html

  Error message from /var/log/syslog:

   kernel: [  639.531889] PKCS#7 signature not signed with a trusted key
   kernel: [  639.538251] lttng_tracer: Unknown symbol lttng_hp_prepare (err 0)
   kernel: [  639.538280] lttng_tracer: Unknown symbol lttng_hp_online (err 0)
   lttng-sessiond[1097]: Error: Unable to load required module lttng-ring-buffer-client-discard
   lttng-sessiond[1097]: Warning: No kernel tracer available
   kernel: [  639.606845] PKCS#7 signature not signed with a trusted key
   kernel: [  639.613331] lttng_tracer: Unknown symbol lttng_hp_prepare (err 0)
   kernel: [  639.613360] lttng_tracer: Unknown symbol lttng_hp_online (err 0)
   lttng-sessiond[1097]: Error: Unable to load required module lttng-ring-buffer-client-discard
   lttng-sessiond[1097]: Warning: No kernel tracer available
   kernel: [  639.677124] PKCS#7 signature not signed with a trusted key
   kernel: [  639.680857] lttng_tracer: Unknown symbol lttng_hp_prepare (err 0)
   kernel: [  639.680886] lttng_tracer: Unknown symbol lttng_hp_online (err 0)
   lttng-sessiond[1097]: Error: Unable to load required module lttng-ring-buffer-client-discard
   lttng-sessiond[1097]: Warning: No kernel tracer available
   kernel: [  639.737914] PKCS#7 signature not signed with a trusted key
   kernel: [  639.753366] lttng_tracer: Unknown symbol lttng_hp_prepare (err 0)
   kernel: [  639.753394] lttng_tracer: Unknown symbol lttng_hp_online (err 0)
   lttng-sessiond[1097]: Error: Unable to load required module lttng-ring-buffer-client-discard
   lttng-sessiond[1097]: Warning: No kernel tracer available
   kernel: [  639.829710] PKCS#7 signature not signed with a trusted key
   kernel: [  639.843736] lttng_tracer: Unknown symbol lttng_hp_prepare (err 0)
   kernel: [  639.843765] lttng_tracer: Unknown symbol lttng_hp_online (err 0)
   lttng-sessiond[1097]: Error: Unable to load required module lttng-ring-buffer-client-discard
   lttng-sessiond[1097]: Warning: No kernel tracer available

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