[Bug 1217757] Re: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.NoReply: Did not receive a reply.

[Tyler Hicks]

This bug is very finicky to reproduce. I've been testing with completely
up to date and pristine Saucy virtual machines on both amd64 and i386,
*without* the AppArmor mediation dbus package (so I'm testing dbus
1.6.12.0ubuntu2).

These are throw away VMs that I create and trash as needed. I'll create
one and it will never hit this bug, hit this bug on some boots, or hit
this bug on every boot. I haven't been able to see pattern.

However, I currently have an i386 VM that is hitting this bug on every
boot. This is the contents of ~/.xsession-errors:

$ cat ~/.xsession-errors
Script for cjkv started at run_im.
Script for default started at run_im.
init: at-spi2-registryd main process ended, respawning
init: at-spi2-registryd main process ended, respawning
init: at-spi2-registryd main process ended, respawning
init: at-spi2-registryd main process ended, respawning
init: at-spi2-registryd main process ended, respawning
init: at-spi2-registryd main process ended, respawning
init: at-spi2-registryd main process ended, respawning
init: at-spi2-registryd main process ended, respawning
init: at-spi2-registryd main process ended, respawning
init: at-spi2-registryd main process ended, respawning
init: at-spi2-registryd respawning too fast, stopped

I don't know much about at-spi2, but I noticed that this dbus method
call hangs until a timeout is reached:

$ sudo dbus-send --session --print-reply --dest=org.a11y.Bus /org/a11y/bus org.a11y.Bus.GetAddress
Error org.freedesktop.DBus.Error.NoReply: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
Command exited with non-zero status 1
real 25.02
user 0.00
sys 0.00

There are no AppArmor denials in the syslog and dbus dbus
1.6.12-0ubuntu2 is running, so I think it is completely safe to say that
AppArmor and AppArmor D-Bus mediation is not at fault here.


** Also affects: at-spi2-core (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: at-spi2-core (Ubuntu)
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1217757

Title:
  Error retrieving accessibility bus address:
  org.freedesktop.DBus.Error.NoReply: Did not receive a reply.

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