| cjwatson | that's not surprising; if you randomly kill debconf, extra questions are the least of your worries | 01:29 |
|---|---|---|
| cjwatson | if it's happening about half the time, I'd love it if you could step through the installer until just before the end of the partitioner, then from tty2, 'udpkg -i /cdrom/pool/main/s/strace/strace_*.deb', 'ps ax' to find the main-menu process, and 'strace -f -o /tmp/foo.trace -s 1024 -tt -p <whatever the main-menu pid is>' | 01:30 |
| cjwatson | ctrl-c that if/after it hangs, 'anna-install openssh-client', and scp the trace out | 01:31 |
| cjwatson | this is a little reminiscent of http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=100616, but I don't think it's the same thing | 01:34 |
| === mode/#ubuntu-installer [+o cjwatson] by ChanServ | ||
| === ..[topic/#ubuntu-installer:cjwatson] : Development of d-i and ubiquity in Ubuntu | ||
| === mode/#ubuntu-installer [-o cjwatson] by cjwatson | ||
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| jerom1 | Hi Colin and all, | 11:38 |
| jerom1 | I would wish to test your friday's patch by adding your modification in the initrd of my netboot. How can i find your fix ? | 11:38 |
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| === Signon time : Sun Nov 26 10:40:44 2006 | ||
| === Signoff time : Mon Nov 27 13:16:53 2006 | ||
| === Total uptime : 1d 2h 36m 9s | ||
| === Starting logfile irclogs/ubuntu-installer.log | ||
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| === Topic for #ubuntu-installer: Development of d-i and ubiquity in Ubuntu | ||
| === Topic (#ubuntu-installer): set by cjwatson at Mon Nov 27 01:35:39 2006 | ||
| mark | cjwatson: alright I'll see what I can do | 01:51 |
| cjwatson | thanks | 01:51 |
| mark | I guess I could start an openssh server on the machine if I'm doing the install manually step by step anyway | 01:53 |
| cjwatson | possibly the fewer perturbations the better, though | 01:54 |
| mark | yes but I don't have physical access to most of our machines | 01:55 |
| mark | they are thousands of miles away ;) | 01:55 |
| === cjwatson nods | ||
| mark | let me try it rightaway on an idle server in korea | 02:09 |
| mark | of course it doesn't happen if you WANT it to happen | 02:41 |
| cjwatson | a watched pot never boils | 02:43 |
| mark | maybe it doesn't help that the install goes a lot slower now because of a different mirror | 02:44 |
| cjwatson | that shouldn't make a difference; it downloads everything and then installs it all | 02:44 |
| mark | you never know | 02:45 |
| mark | aha | 03:00 |
| mark | now the install seems stalled on "Installed libisccfg1" | 03:00 |
| mark | so it's likely not a man-db issue but a debconf one? | 03:00 |
| cjwatson | could be anything | 03:05 |
| cjwatson | would need an strace to investigate | 03:06 |
| mark | trying to get you one now | 03:07 |
| mark | btw, once I used db_set in a postinst script in one of our own packages | 03:07 |
| mark | and that made everything stall as well | 03:08 |
| mark | might be the same thing | 03:08 |
| mark | but that was very reproducable | 03:08 |
| cjwatson | probably a different problem, such as causing debconf to exit before the db_set | 03:11 |
| cjwatson | db_set does work :-) | 03:11 |
| mark | server-expert installs at 9600bps = no fun :) | 03:12 |
| mark | ah there is no openssh-server udeb | 03:27 |
| mark | let's see if I can do without... | 03:28 |
| cjwatson | is too | 03:41 |
| cjwatson | but it comes unconfigured so is not really quite what you want | 03:41 |
| cjwatson | (it's in universe) | 03:41 |
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| mark | I have found another way | 03:55 |
| mark | I start the strace in the ssh shell using the menu | 03:55 |
| mark | and have it log to /var/log/stall.trace | 03:55 |
| mark | then I start the internal debug logs webserver | 03:55 |
| mark | and go on with the install | 03:55 |
| mark | ok it seems stalled at "Installed cron" | 03:57 |
| mark | http://yf1014.yaseo.wikimedia.org/stall.trace | 03:57 |
| cjwatson | jerom1: 'svn di -r42868:42869 svn://svn.debian.org/svn/d-i/trunk/packages/debian-installer-utils/list-devices', applied to /bin/list-devices. If it breaks, you get to keep both pieces. | 04:01 |
| jerom1 | collin : thanks | 04:01 |
| mark | 2136 14:56:57.569926 sendto(4, "<15>Nov 27 14:56:57 debconf: <-- 0 OK", 37, MSG_NOSIGNAL, NULL, 0) = 37 | 04:01 |
| mark | 2136 14:56:57.570009 write(5, "0 OK", 4) = 4 | 04:01 |
| mark | 2136 14:56:57.570056 write(5, "\n", 1) = 1 | 04:01 |
| mark | 2136 14:56:57.570102 read(6, | 04:01 |
| cjwatson | (just the one l) | 04:01 |
| mark | are the last lines in the trace | 04:01 |
| cjwatson | that sounds like you're just tracing debconf | 04:01 |
| mark | isn't the main menu debconf? | 04:02 |
| cjwatson | but the hang might not be there | 04:02 |
| cjwatson | you're prejudging the outcome ... | 04:02 |
| mark | I am not | 04:02 |
| mark | you asked me to trace the main menu pid :) | 04:02 |
| cjwatson | with -f | 04:02 |
| mark | I did | 04:02 |
| cjwatson | and no, the main menu actually isn't debconf | 04:02 |
| cjwatson | it's "main-menu" | 04:02 |
| mark | ok | 04:02 |
| mark | I will start over | 04:03 |
| cjwatson | sorry, I thought I'd been clear | 04:03 |
| mark | maybe I didn't look very well | 04:03 |
| mark | np | 04:03 |
| mark | I now know how to do it | 04:03 |
| cjwatson | looking at the trace anyway, but it looks like it's the other side of the protocol that's hanging | 04:03 |
| mark | yes | 04:03 |
| cjwatson | debconf is just waiting for input, which is legitimate and normal | 04:03 |
| mark | indeed | 04:04 |
| cjwatson | could conceivably be apt or something at this rate | 04:04 |
| cjwatson | but we'll see | 04:04 |
| mark | I should put the strace in the early_command script... easier | 04:08 |
| mark | oh this is going to be a fun trace | 04:19 |
| cjwatson | (not likely to be around much for the rest of my afternoon, BTW) | 04:20 |
| mark | ok | 04:20 |
| mark | I'll just save it | 04:20 |
| cjwatson | nnn | 04:20 |
| cjwatson | (argh, bloody connection) | 04:20 |
| mark | gee, the installer is doing a lot of forks... | 04:21 |
| cjwatson | it does that | 05:00 |
| cjwatson | something to do with largely being written in shell ;-) | 05:00 |
| cjwatson | Doesn't help performance on hppa any, where fork() is really slow. It's not too bad on the other architectures. | 05:01 |
| mark | hehe | 05:26 |
| mark | my strace download is now one hour behind | 05:26 |
| mark | an hour to just install base ;) | 05:26 |
| mark | killed for out of memory | 05:54 |
| cjwatson | d'oh | 05:55 |
| mark | it was > 4 GB in size ;) | 05:55 |
| mark | this is not feasible | 05:55 |
| cjwatson | when did you start the trace? | 05:55 |
| mark | right before base install | 05:55 |
| cjwatson | hmm | 05:55 |
| cjwatson | is it feasible to dump the trace to disk instead of RAM? | 05:56 |
| mark | hmm | 05:56 |
| mark | maybe | 05:56 |
| mark | would have to be another disk than the installer is working on I guess | 05:56 |
| cjwatson | you'd have to run in expert mode until the end of the partitioner in order to give yourself time to set up the trace before base-installer starts, and then change debconf priority back to high to get into base-installer | 05:56 |
| cjwatson | no, if you set up the trace after the partitioner has finished working then you can safely write into /target/tmp/ | 05:57 |
| mark | or I have it streamed out over the LAN | 05:58 |
| mark | I can do it after base-installer I guess, it doesn't happen during bae | 06:09 |
| mark | base | 06:09 |
| cjwatson | it doesn't? | 06:11 |
| cjwatson | oh, Ubuntu doesn't install man-db as part of base | 06:11 |
| cjwatson | I totally forgot about that ;-) | 06:11 |
| mark | :) | 06:11 |
| cjwatson | hi, can you tell I'm the man-db maintainer, a Debian installer developer, and the Ubuntu installer lead? sheesh | 06:11 |
| mark | yes, clearly :) | 06:11 |
| cjwatson | yeah, ok, so right before pkgsel would work fine as well | 06:12 |
| mark | but with many hats things can get intermixed | 06:12 |
| cjwatson | exactly - Debian installs man-db in base | 06:12 |
| mark | what does "Build LTSP chroot"? | 06:13 |
| mark | +do | 06:13 |
| cjwatson | it's an Edubuntu thing | 06:14 |
| cjwatson | thin client integration | 06:14 |
| mark | /dev/sda1 7.3G 479.8M 6.5G 7% /target | 06:15 |
| mark | I hope that's gonna be enough :) | 06:15 |
| cjwatson | if you're installing an LTSP server, it builds a pre-cooked chroot that you can serve out to clients | 06:15 |
| mark | I see | 06:15 |
| mark | so I can skip it next time | 06:15 |
| cjwatson | yeah | 06:17 |
| mark | ok there we go, I have it log to /target/tmp, and I put a symlink in /var/log/ so it's available over the network | 06:17 |
| mark | http://yf1014.yaseo.wikimedia.org/stall.trace | 06:17 |
| mark | gonna start pkgsel now | 06:17 |
| mark | grr | 06:23 |
| mark | of course now it went just fine | 06:23 |
| mark | and again :( | 06:39 |
| jerom1 | bye | 06:47 |
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| mark | can't reproduce it with strace running | 07:11 |
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