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[Bug 886321] Re: Upstart issue and mythbackend

To: mythbuntu-bugs@xxxxxxxxxxxxxxxxxxx
From: monochromec <monochromec@xxxxxxxxx>
Date: Tue, 03 Jan 2012 07:27:08 -0000
Reply-to: Bug 886321 <886321@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Further observation: doesn't seem to be a timing problem / race
condition right after system init as this behaviour persists way beyond
boot stage, ie. is reproducible all along the way.

What would be of great help to track this down is what exit code 127
from the backend exactly means. Esp. as the backend exits before ANY
logging information is produced...

Here's what initctl produced when setting the log level to debug:

Jan  3 08:10:58 htpc kernel: [ 1443.013593] init: mythtv-backend goal changed from stop to start
Jan  3 08:10:58 htpc kernel: [ 1443.013954] init: mythtv-backend state changed from waiting to starting
Jan  3 08:10:58 htpc kernel: [ 1443.014288] init: event_new: Pending starting event
Jan  3 08:10:58 htpc kernel: [ 1443.014366] init: Handling starting event
Jan  3 08:10:58 htpc kernel: [ 1443.014588] init: event_finished: Finished starting event
Jan  3 08:10:58 htpc kernel: [ 1443.014634] init: mythtv-backend state changed from starting to pre-start
Jan  3 08:10:58 htpc kernel: [ 1443.016178] init: mythtv-backend pre-start process (2959)
Jan  3 08:10:58 htpc kernel: [ 1443.032549] init: mythtv-backend pre-start process (2959) exited normally
Jan  3 08:10:58 htpc kernel: [ 1443.032769] init: mythtv-backend state changed from pre-start to spawned
Jan  3 08:10:58 htpc kernel: [ 1443.034070] init: mythtv-backend main process (2965)
Jan  3 08:10:58 htpc kernel: [ 1443.034206] init: mythtv-backend state changed from spawned to post-start
Jan  3 08:10:58 htpc kernel: [ 1443.034439] init: mythtv-backend state changed from post-start to running
Jan  3 08:10:58 htpc kernel: [ 1443.034581] init: event_new: Pending started event
Jan  3 08:10:58 htpc kernel: [ 1443.034692] init: Handling started event
Jan  3 08:10:58 htpc kernel: [ 1443.035086] init: event_finished: Finished started event
Jan  3 08:10:58 htpc Myth upstart: Tue Jan 3 08:10:58 CET 2012
Jan  3 08:10:58 htpc kernel: [ 1443.045415] init: mythtv-backend main process (2965) terminated with status 127
Jan  3 08:10:58 htpc kernel: [ 1443.045444] init: mythtv-backend main process ended, respawning
Jan  3 08:10:58 htpc kernel: [ 1443.045513] init: mythtv-backend state changed from running to stopping
Jan  3 08:10:58 htpc kernel: [ 1443.045596] init: event_new: Pending stopping event
Jan  3 08:10:58 htpc kernel: [ 1443.045650] init: Handling stopping event
Jan  3 08:10:58 htpc kernel: [ 1443.045719] init: event_finished: Finished stopping event
Jan  3 08:10:58 htpc kernel: [ 1443.045733] init: mythtv-backend state changed from stopping to killed
Jan  3 08:10:58 htpc kernel: [ 1443.045771] init: mythtv-backend state changed from killed to post-stop
Jan  3 08:10:58 htpc kernel: [ 1443.045804] init: mythtv-backend state changed from post-stop to starting
Jan  3 08:10:58 htpc kernel: [ 1443.045840] init: event_new: Pending starting event
Jan  3 08:10:58 htpc kernel: [ 1443.045855] init: Handling starting event
Jan  3 08:10:58 htpc kernel: [ 1443.045908] init: event_finished: Finished starting event
Jan  3 08:10:58 htpc kernel: [ 1443.045921] init: mythtv-backend state changed from starting to pre-start
Jan  3 08:10:58 htpc kernel: [ 1443.047490] init: mythtv-backend pre-start process (2969)
Jan  3 08:10:58 htpc kernel: [ 1443.060452] init: mythtv-backend pre-start process (2969) exited normally
Jan  3 08:10:58 htpc kernel: [ 1443.060551] init: mythtv-backend state changed from pre-start to spawned
Jan  3 08:10:58 htpc kernel: [ 1443.061526] init: mythtv-backend main process (2975)
Jan  3 08:10:58 htpc kernel: [ 1443.061713] init: mythtv-backend state changed from spawned to post-start
Jan  3 08:10:58 htpc kernel: [ 1443.062085] init: mythtv-backend state changed from post-start to running
Jan  3 08:10:58 htpc kernel: [ 1443.062351] init: event_new: Pending started event
Jan  3 08:10:58 htpc kernel: [ 1443.062427] init: Handling started event
Jan  3 08:10:58 htpc kernel: [ 1443.062797] init: event_finished: Finished started event
Jan  3 08:10:58 htpc Myth upstart: Tue Jan 3 08:10:58 CET 2012
Jan  3 08:10:58 htpc kernel: [ 1443.073113] init: mythtv-backend main process (2975) terminated with status 127
Jan  3 08:10:58 htpc kernel: [ 1443.073184] init: mythtv-backend main process ended, respawning
Jan  3 08:10:58 htpc kernel: [ 1443.073372] init: mythtv-backend state changed from running to stopping
Jan  3 08:10:58 htpc kernel: [ 1443.073590] init: event_new: Pending stopping event
Jan  3 08:10:58 htpc kernel: [ 1443.073652] init: Handling stopping event
Jan  3 08:10:58 htpc kernel: [ 1443.073835] init: event_finished: Finished stopping event
Jan  3 08:10:58 htpc kernel: [ 1443.073881] init: mythtv-backend state changed from stopping to killed
Jan  3 08:10:58 htpc kernel: [ 1443.074016] init: mythtv-backend state changed from killed to post-stop
Jan  3 08:10:58 htpc kernel: [ 1443.074134] init: mythtv-backend state changed from post-stop to starting
Jan  3 08:10:58 htpc kernel: [ 1443.074259] init: event_new: Pending starting event
Jan  3 08:10:58 htpc kernel: [ 1443.074311] init: Handling starting event
Jan  3 08:10:58 htpc kernel: [ 1443.074495] init: event_finished: Finished starting event
Jan  3 08:10:58 htpc kernel: [ 1443.074540] init: mythtv-backend state changed from starting to pre-start
Jan  3 08:10:58 htpc kernel: [ 1443.075501] init: mythtv-backend pre-start process (2979)
Jan  3 08:10:58 htpc kernel: [ 1443.093153] init: mythtv-backend pre-start process (2979) exited normally
Jan  3 08:10:58 htpc kernel: [ 1443.093353] init: mythtv-backend state changed from pre-start to spawned
Jan  3 08:10:58 htpc kernel: [ 1443.095702] init: mythtv-backend main process (2985)
Jan  3 08:10:58 htpc kernel: [ 1443.095868] init: mythtv-backend state changed from spawned to post-start
Jan  3 08:10:58 htpc kernel: [ 1443.096120] init: mythtv-backend state changed from post-start to running
Jan  3 08:10:58 htpc kernel: [ 1443.096331] init: event_new: Pending started event
Jan  3 08:10:58 htpc kernel: [ 1443.096414] init: Handling started event
Jan  3 08:10:58 htpc kernel: [ 1443.096782] init: event_finished: Finished started event
Jan  3 08:10:58 htpc Myth upstart: Tue Jan 3 08:10:58 CET 2012
Jan  3 08:10:58 htpc kernel: [ 1443.108234] init: mythtv-backend main process (2985) terminated with status 127
Jan  3 08:10:58 htpc kernel: [ 1443.108293] init: mythtv-backend respawning too fast, stopped
Jan  3 08:10:58 htpc kernel: [ 1443.108624] init: mythtv-backend goal changed from start to stop
Jan  3 08:10:58 htpc kernel: [ 1443.108741] init: mythtv-backend state changed from running to stopping
Jan  3 08:10:58 htpc kernel: [ 1443.108874] init: event_new: Pending stopping event
Jan  3 08:10:58 htpc kernel: [ 1443.108938] init: Handling stopping event
Jan  3 08:10:58 htpc kernel: [ 1443.109122] init: event_finished: Finished stopping event
Jan  3 08:10:58 htpc kernel: [ 1443.109167] init: mythtv-backend state changed from stopping to killed
Jan  3 08:10:58 htpc kernel: [ 1443.109280] init: mythtv-backend state changed from killed to post-stop
Jan  3 08:10:58 htpc kernel: [ 1443.109391] init: mythtv-backend state changed from post-stop to waiting
Jan  3 08:10:58 htpc kernel: [ 1443.109528] init: event_new: Pending stopped event
Jan  3 08:10:58 htpc kernel: [ 1443.109592] init: job_change_state: Destroyed inactive instance mythtv-backend
Jan  3 08:10:58 htpc kernel: [ 1443.109753] init: Handling stopped event
Jan  3 08:10:58 htpc kernel: [ 1443.109918] init: event_finished: Finished stopped event

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https://bugs.launchpad.net/bugs/886321

Title:
  Upstart issue and mythbackend

Status in “mythtv” package in Ubuntu:
  Incomplete

Bug description:
  Strange problem with the backend during upstart on Ubuntu oneiric: the
  syslog tells me that the backend respawns too quickly and thus gives
  up on trying to start it via upstart.

  Steps to reproduce:

  1) Reboot system 2) Check with 'ps' and the syslog

  I changed the interface from lo to eth0 in the pre-conditions and also
  changed .5 to 60 in the script sections but to no avail...

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: mythtv 2:0.24.0+fixes.20110908.1de0431-0ubuntu1
  ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
  Uname: Linux 3.0.0-12-generic x86_64
  ApportVersion: 1.23-0ubuntu3
  Architecture: amd64
  Date: Fri Nov  4 20:50:50 2011
  Installed_mythtv_dbg: 0.0
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=en_US:en
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: mythtv
  UpgradeStatus: Upgraded to oneiric on 2011-10-15 (20 days ago)

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Follow ups

Re: [Bug 886321] Re: Upstart issue and mythbackend
From: Mario Limonciello, 2012-01-03
References

[Bug 886321] [NEW] Upstart issue and mythbackend
From: monochromec, 2011-11-04