[Bug 845942] Re: dbus-daemon eats all the CPU rendering whole system unusable for a few seconds

[Andrew]

*** This bug is a duplicate of bug 856212 ***
    https://bugs.launchpad.net/bugs/856212

** This bug has been marked a duplicate of bug 856212
   dbus-daemon consumes 100% CPU

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https://bugs.launchpad.net/bugs/845942

Title:
  dbus-daemon eats all the CPU rendering whole system unusable for a few
  seconds

Status in “dbus” package in Ubuntu:
  Confirmed

Bug description:
  After a day or two of uptime, dbus-daemon eats 100% of CPU time for a
  few seconds. Freezing the whole desktop. No particular pattern to it,
  sometimes it happens three times in a minute, sometimes it happens
  once every 15 minutes. But once it starts happening it won't stop
  until restart.

  strace output (for dbus-daemon) during the freeze is full of this:

  sendmsg(113, {msg_name(0)=NULL, msg_iov(2)=[{"l\4\1\1\21\0\0\0NT\r\0\216\0\0\0\10\1g\0\2as\0\1\1o\0/\0\0\0"..., 160}, {"\r\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17}], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 177
  sendmsg(125, {msg_name(0)=NULL, msg_iov(2)=[{"l\4\1\1\21\0\0\0OT\r\0\216\0\0\0\10\1g\0\2as\0\1\1o\0/\0\0\0"..., 160}, {"\r\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17}], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 177
  sendmsg(87, {msg_name(0)=NULL, msg_iov(2)=[{"l\4\1\1\21\0\0\0OT\r\0\216\0\0\0\10\1g\0\2as\0\1\1o\0/\0\0\0"..., 160}, {"\r\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17}], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 177
  sendmsg(113, {msg_name(0)=NULL, msg_iov(2)=[{"l\4\1\1\21\0\0\0OT\r\0\216\0\0\0\10\1g\0\2as\0\1\1o\0/\0\0\0"..., 160}, {"\r\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17}], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 177
  sendmsg(125, {msg_name(0)=NULL, msg_iov(2)=[{"l\4\1\1\21\0\0\0PT\r\0\226\0\0\0\10\1g\0\2as\0\1\1o\0000\0\0\0"..., 168}, {"\r\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17}], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 185
  sendmsg(87, {msg_name(0)=NULL, msg_iov(2)=[{"l\4\1\1\21\0\0\0PT\r\0\226\0\0\0\10\1g\0\2as\0\1\1o\0000\0\0\0"..., 168}, {"\r\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17}], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 185
  sendmsg(113, {msg_name(0)=NULL, msg_iov(2)=[{"l\4\1\1\21\0\0\0PT\r\0\226\0\0\0\10\1g\0\2as\0\1\1o\0000\0\0\0"..., 168}, {"\r\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17}], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 185
  sendmsg(125, {msg_name(0)=NULL, msg_iov(2)=[{"l\4\1\1\21\0\0\0QT\r\0\226\0\0\0\10\1g\0\2as\0\1\1o\0000\0\0\0"..., 168}, {"\r\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 17}], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 185

  And dbus-monitor will output a lot of this:

  signal sender=:1.48 -> dest=(null destination) serial=875105 path=/org/gnome/evolution/dataserver/Calendar/1891/1247; interface=org.gnome.evolution.dataserver.Calendar; member=opened
     array [
        string ""
        string ""
     ]
  signal sender=:1.48 -> dest=(null destination) serial=875106 path=/org/gnome/evolution/dataserver/Calendar/1891/1249; interface=org.gnome.evolution.dataserver.Calendar; member=opened
     array [
        string ""
        string ""
     ]
  signal sender=:1.48 -> dest=(null destination) serial=875107 path=/org/gnome/evolution/dataserver/Calendar/1891/1251; interface=org.gnome.evolution.dataserver.Calendar; member=opened
     array [
        string ""
        string ""
     ]

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: dbus 1.4.14-1ubuntu1
  ProcVersionSignature: Ubuntu 3.0.0-7.8-generic 3.0.0
  Uname: Linux 3.0.0-7-generic x86_64
  Architecture: amd64
  Date: Fri Sep  9 21:15:03 2011
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110531.2)
  SourcePackage: dbus
  UpgradeStatus: No upgrade log present (probably fresh install)

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