qmlscene crashed with SIGABRT in QMessageLogger::fatal()

[Timo Jyrinki]

Reportedly easily reproducable with rss reader. Retraced using apport-retrace + lp:daisy

ProblemType: Crash
DistroRelease: Ubuntu 13.10
Package: qmlscene 5.0.2-6ubuntu4
Uname: Linux 3.4.0-3-mako armv7l
ApportVersion: 2.12.5-0ubuntu2
Architecture: armhf
Date: Tue Oct 22 05:40:54 2013
ExecutablePath: /usr/lib/arm-linux-gnueabihf/qt5/bin/qmlscene
ExecutableTimestamp: 1381490757
InstallationDate: Installed on 2013-10-17 (6 days ago)
InstallationMedia: Ubuntu 13.10 - armhf (20131017)
MarkForUpload: True
ProcCmdline: /usr/lib/arm-linux-gnueabihf/qt5/bin/qmlscene rssreader-app.qml
ProcCwd: /usr/share/click/preinstalled/com.ubuntu.shorts/0.2.116
Signal: 6
SourcePackage: qtdeclarative-opensource-src
StacktraceTop:
 qt_message_fatal (context=..., message=...) at global/qlogging.cpp:868
 QMessageLogger::fatal (this=this@entry=0xbec4511c, msg=0x40dab104 "QUbuntu: Could not create application instance") at global/qlogging.cpp:356
 QUbuntuIntegration::QUbuntuIntegration (this=0x4144408c <lock>, input_factory=0x40db8824 <(anonymous namespace)::InputAdaptorFactory::instance()::global_instance>) at integration.cc:75
 QUbuntuMirIntegration::QUbuntuMirIntegration (this=0xe03a38) at integration.cc:39
 QUbuntuMirClientIntegrationPlugin::create (this=<optimized out>, system=..., paramList=...) at main.cc:41
Title: qmlscene crashed with SIGABRT in raise()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm autopilot cdrom dialout dip nopasswdlogin plugdev sudo tty video

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Apport retracing service (apport)]

StacktraceTop:
 QMessageLogger::fatal(char const*, ...) const () at global/qlogging.cpp:868
 QUbuntuIntegration::QUbuntuIntegration(QUbuntuInputAdaptorFactory*) () at integration.cc:75
 QUbuntuMirIntegration::QUbuntuMirIntegration() () at integration.cc:39
 QUbuntuMirClientIntegrationPlugin::create(QString const&, QStringList const&) () at main.cc:41
 QGuiApplicationPrivate::createPlatformIntegration() () at kernel/qguiapplication.cpp:772

[Timo Jyrinki (timo-jyrinki)]

This seems to be the remaining crasher at http://ci.ubuntu.com/smokeng/trusty/touch/, so raising importance to Critical. Still happening easily with eg. RSS Reader, because of which bug #1256837 was filed.

[Robert Bruce Park (robru)]

Timo, can you tell us the steps to reproduce? Or are you just seeing this in the automated logs only?

[Gerry Boland (gerboland)]

Am able to reproduce with today's devel image. Error seems to step from platform-api failing to create an application instance with u_application_instance_new_from_description_with_options.

Can repro it reasonably reasonably reliably, so am digging.

[Gerry Boland (gerboland)]

SessionAuthorizer::connection_is_allowed (this=0x5b1658, pid=14489
ApplicationManager::authorizeSession (this=0x47547268, pid=14489)
ApplicationManager REJECTED connection from app with pid 14489 as no desktop_file_hint specified
ApplicationManager::onProcessStartReportReceived (this=0x47547268, appId=address-book-app, failure=N)

This part of log file shows this is a race condition. The application creates a Mir connection before upstart sends a signal (via dbus) to the application manager to expect it. Thus app manager rejects the application as it isn't expecting it.

[Gerry Boland (gerboland)]

Talking with Ted, we need upstart-app-launch to add a synchronous signal to notify shell that an application is starting - to guarantee that the process is executed only after ApplicationManager knows about it.

[Ted Gould (ted)]

Adding a bug task for unity8 to use the new API once it lands.

[Gerry Boland (gerboland)]

Fix required in unity-mir only. Changing my affected project

[PS Jenkins bot (ps-jenkins)]

Fix committed into lp:upstart-app-launch at revision None, scheduled for release in upstart-app-launch, milestone Unknown

[PS Jenkins bot (ps-jenkins)]

Fix committed into lp:unity-mir at revision None, scheduled for release in unity-mir, milestone phone-v1-freeze

[Launchpad Janitor (janitor)]

This bug was fixed in the package upstart-app-launch - 0.3+14.04.20131209-0ubuntu2

---------------
upstart-app-launch (0.3+14.04.20131209-0ubuntu2) trusty; urgency=low

  * Restrict on which arch we build url-dispatcher due to the ust build-dep
 -- Didier Roche <email address hidden> Mon, 09 Dec 2013 13:47:51 +0100

[Launchpad Janitor (janitor)]

This bug was fixed in the package unity-mir - 0.2+14.04.20131209-0ubuntu1

---------------
unity-mir (0.2+14.04.20131209-0ubuntu1) trusty; urgency=low

  [ Gerry Boland ]
  * Unity.Application is not a shared library, but a plugin. (LP:
    #1256014)
  * Implement preStart callback added to upstart-app-launch-2. (LP:
    #1243665)

  [ Ubuntu daily release ]
  * Automatic snapshot from revision 157
 -- Ubuntu daily release <email address hidden> Mon, 09 Dec 2013 02:58:23 +0000

[Cris Dywan (kalikiana)]

This looks to be the same as bug 1262158 see https://jenkins.qa.ubuntu.com/job/generic-mediumtests-runner-mako/4168/ and https://jenkins.qa.ubuntu.com/job/generic-mediumtests-runner-mako/4168/consoleText for how it fails the ui toolkit autopilot test runs.

[Cris Dywan (kalikiana)]

See also bug 1262982.