Here's a "gdb attach" backtrace of the hung process:
> pstree -p
─dpkg(24158)───update-notifier(19121)───package-data-do(19123)
│ │
└─{precise}(9759)
(gdb) attach 19123
(gdb) bt
#0 0x00007fcdc8074102 in recv () from /lib/x86_64-linux-gnu/libpthread.so.0
#1 0x00000000004902a0 in sock_recv_guts ()
#2 0x0000000000493d2f in sock_recv.59458 ()
#3 0x0000000000486614 in PyEval_EvalFrameEx ()
#4 0x000000000048d930 in PyEval_EvalCodeEx ()
#5 0x0000000000486bb8 in PyEval_EvalFrameEx ()
#6 0x000000000048d930 in PyEval_EvalCodeEx ()
#7 0x0000000000486bb8 in PyEval_EvalFrameEx ()
#8 0x000000000048d930 in PyEval_EvalCodeEx ()
#9 0x0000000000486bb8 in PyEval_EvalFrameEx ()
#10 0x0000000000486e02 in PyEval_EvalFrameEx ()
#11 0x000000000048d930 in PyEval_EvalCodeEx ()
#12 0x00000000004246a1 in PyRun_FileExFlags ()
#13 0x000000000042492e in PyRun_SimpleFileExFlags ()
#14 0x0000000000425cb6 in Py_Main ()
#15 0x00007fcdc6d7376d in __libc_start_main () from
/lib/x86_64-linux-gnu/libc.so.6
#16 0x000000000041bb31 in _start ()
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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to flashplugin-nonfree in Ubuntu.
https://bugs.launchpad.net/bugs/1243090
Title:
Dist Upgrade from 13.04 to 13.10 stuck during flashplugin-installer
Status in “flashplugin-nonfree” package in Ubuntu:
Confirmed
Status in “update-notifier” package in Ubuntu:
Confirmed
Bug description:
When I was upgrading from Ubuntu 13.04 (raring) to Ubuntu 13.10
(saucy), the installation was stuck for several hours here:
flashplugin-installer: downloading
http://archive.canonical.com/pool/partner/a/adobe-flashplugin/adobe-
flashplugin_11.2.202.310.orig.tar.gz
Eventually, due to a system reboot (caused by baby pounding on the
keyboard), I had to recover from the half-finished upgrade process
manually.
It might be an isolated incident, but I am not alone, as seen by this
user's experience here:
"13.04 to 13.10 upgrade stalled at flashplugin-installer", posted
2013-10-19:
http://askubuntu.com/questions/361591/13-04-to-13-10-upgrade-stalled-at-flashplugin-installer
After I got my system back in order (e.g. sudo dpkg --configure -a;
purging obsolete/unneeded packages; removing ~/.config/gtk-3.0 to get
the correct set of system tray icons; adding input methods, etc.), I
tried "sudo apt-get --reinstall install flashplugin-installer" again:
Processing triggers for update-notifier-common ...
flashplugin-installer: downloading
http://archive.canonical.com/pool/partner/a/adobe-flashplugin/adobe-flashplugin_11.2.202.310.orig.tar.gz
And it got stuck again, with or without proxy.
I originally suspected that it may have something to do with GFW of
China, but then a normal "wget
http://archive.canonical.com/pool/partner/a/adobe-flashplugin/adobe-
flashplugin_11.2.202.310.orig.tar.gz", albeit somewhat slow, fetched
the file just fine, both with direct connection and with proxy.
Digging deeper, it dawned on me that Ubuntu's flashplugin-installer
differs from Debian's flashplugin-nonfree, mainly, the Ubuntu-specific
"update-notifier" and its package-data-downloader Python script is
used instead of wget for downloading external package data.
So, I finally found "/usr/share/package-data-downloads/flashplugin-installer",
and in "/usr/lib/update-notifier/package-data-downloader", these relevant
lines:
print "%s: downloading %s" % (relfile, files[i])
dest_file = urllib.urlretrieve(files[i])[0]
output = subprocess.check_output(["sha256sum",
dest_file])
Failed to discover the location of the tempfile that
urllib.urlretrieve() writes to, I fell asleep.
Today, I decided to file this bug report before my interests die down
and my memory fails me. :-)
As I was typing this, I tried to install flashplugin-installer again,
and I discovered that urllib.urlretrieve() writes to /tmp/tmpXXXXXX.gz
(e.g. /tmp/tmpXbszB4.gz) by default, and was able to see the file
growing in size.
True to Murphy's Law, despite failing to install flashplugin-installer
for two days, now I see it installs successfully, as I am finishing
this bug report! :-p
Nevertheless, I think this bug is worth looking into and taking care
of. There are at least two such confirmed incidents, and it is such a
downer when the whole distribution upgrade process got stuck by
something as "innocuous" as the Adobe Flash Plugin. :-p
A few points to look at:
1. Are Python's urllib.urlretrieve() and friends able to provide a
download progress bar of some sort so that the end-user isn't stuck
wondering whether the download stalled, or just that it is slow?
2. From my cable TV 6 Mbps Internet connection in Beijing, depending
on the time of the day, the download speed
http://archive.canonical.com/pool/partner/a/adobe-flashplugin/adobe-
flashplugin_11.2.202.310.orig.tar.gz may get as low as 20KB/s or even
10KB/s, which translates to 10 to 20 minutes of download for this 13MB
tarball. Even without connection timeout or whatnot, the end-user
cannot help but wonder what is happening. Debian's older flashplugin-
nonfree package with wget's progress bar has the definite advantage
here.
3. Does urllib.urlretrieve() and the rest of /usr/lib/update-
notifier/package-data-downloader handle all kinds of exceptions like
network error, DNS timeout, download interruption, etc. gracefully?
Or are there some corner cases where "stalling" would indeed happen?
Many thanks for looking into this!
Cheers,
Anthony Fok
ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: flashplugin-installer 11.2.202.310ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
Uname: Linux 3.11.0-12-generic x86_64
ApportVersion: 2.12.5-0ubuntu2
Architecture: amd64
Date: Tue Oct 22 15:17:50 2013
InstallationDate: Installed on 2012-12-11 (314 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MarkForUpload: True
SourcePackage: flashplugin-nonfree
UpgradeStatus: Upgraded to saucy on 2013-10-21 (1 days ago)
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