| [09:48] <frankban> gmb: good morning, I am starting juju charms to run tests | |
| [09:49] <gmb> frankban, Morning. Cool. I'm just looking at Gary's email now... | |
| [09:49] <frankban> gmb: select/read hangs, scary | |
| [09:49] <gmb> Yeah :/ | |
| [09:53] <frankban> si\ | |
| [09:53] <frankban> ops | |
| [11:36] * bac \o | |
| [11:36] <gmb> Wow. Shows how long it's been since I did any LP development work. My env is completely broken. | |
| [11:37] <bac> gmb: no kidding. and it seems things are moving around a lot over the last few weeks. | |
| [12:06] <frankban> gary_poster: good morning, now I have a better understanding of what's going on with testrepository | |
| [12:07] <gary_poster> frankban, awesome. good afternoon. | |
| [12:08] <gary_poster> what does that mean practically for our issues? | |
| [12:08] <frankban> gary_poster: the debian control file in http://bazaar.launchpad.net/~testrepository/debian/sid/python-testrepository/sid/view/head:/debian/control (the one we use) is different from the one in ubuntu upstream: http://bazaar.launchpad.net/~ubuntu-branches/ubuntu/precise/testrepository/precise/view/head:/debian/control | |
| [12:09] <gary_poster> ahhh! | |
| [12:09] <gary_poster> so if we switch, all will be well? easy? | |
| [12:10] <gary_poster> need to step away; back soon. | |
| [12:13] <frankban> gary_poster: yes, but I have a question: my branch patches testrepository trunk. So our ppa installs the trunk revision (maybe we could use that to see if https://bugs.launchpad.net/testrepository/+bug/775214 is fixed) However, no problem for me to update the ppa to use a patched upstream release. | |
| [12:13] <_mup_> Bug #775214: On python 2.7: String or Integer object expected for key, unicode found <Testrepository:Fix Committed by lifeless> < https://launchpad.net/bugs/775214 > | |
| [12:13] * frankban lunch | |
| [12:19] <frankban> gary_poster: buildbot tests are currently running on ec2, access granted for you and benji (user: ubuntu) | |
| [12:19] <frankban> zk: ec2-107-20-6-115.compute-1.amazonaws.com | |
| [12:20] <frankban> master: ec2-50-16-78-27.compute-1.amazonaws.com | |
| [12:20] <frankban> slave: ec2-23-20-98-182.compute-1.amazonaws.com | |
| [12:20] * frankban really lunches | |
| [12:23] <benji> precise... <sigh> | |
| [12:23] * benji goes to report a bug on precise | |
| [12:35] <gary_poster> frankban, ec2: great thank you | |
| [12:36] <gary_poster> frankban, testrepository: I *guess*...if we can easily fix the subunit dependency issue (and I expect we can) then using trunk would be good | |
| [12:37] <gary_poster> that makes me a bit nervous | |
| [12:37] <gary_poster> but it is probably good for the long run and hopefully ok for the short run | |
| [12:39] <gary_poster> I would guess we would have to make our own branch of the ubuntu debian bits | |
| [12:55] * gary_poster thinks aptitude rocks | |
| [13:02] <benji> I've considered starting to use aptitude, and there have been a couple of times I wish I already had. | |
| [13:09] <gary_poster> bac benji frankban gmb call in 2 or sooner | |
| [13:11] <gmb> A tumbleweed rolls through goldenhorde | |
| [13:26] <gary_poster> https://docs.google.com/a/canonical.com/document/d/19Zn7fGkQH5oOpJkaU2lGCpt8RK5KiDpPBTKJKs50wWw/edit | |
| [13:48] <gary_poster> benji, I'm going to restart post update, then I'd like to discuss strategy for tackling the test hangs when you have a moment | |
| [13:48] <benji> gary_poster: sure | |
| [13:48] <gary_poster> thanks | |
| [14:04] <gary_poster> OK, benji. https://talkgadget.google.com/hangouts/extras/canonical.com/goldenhorde when you get a chance. camera appears to be working post-update | |
| [14:51] <gary_poster> benji, fwiw, this is the command I am running (no confirmation yet that it is working): | |
| [14:51] <gary_poster> xvfb-run --error-file=/var/tmp/xvfb-errors.log --server-args='-screen 0 1024x768x24' -a /home/gary/launchpad/lp/sandbox/bin/test --subunit --load-list /home/gary/temp/tmp0d4ZXs | |
| [14:51] <benji> k | |
| [14:51] <gary_poster> yeah it seems to be working | |
| [14:52] <gary_poster> I probably should have teed the output | |
| [14:52] <gary_poster> but I didn't | |
| [14:53] <benji> good point, I'll tee mine | |
| [15:02] <bac> sorry about the email churn with failed PPA builds. i'm trying to get the packaging to work with the new name spelling. hopefully the next one will work. | |
| [15:03] <gary_poster> thanks, np | |
| [15:03] * gary_poster needs to go babysit and such. biab | |
| [15:22] <gary_poster> benji, are you getting a lot of "SilentLaunchpadScriptFailure: 1" errors? | |
| [15:22] <benji> gary_poster: nope | |
| [15:22] <gary_poster> k | |
| [15:23] <gary_poster> a lot of failures on my side. going away again | |
| [15:23] <benji> gary_poster: I started later than you did, so I might not be there yet. | |
| [15:23] <gary_poster> maybe so | |
| [15:23] <gary_poster> hm | |
| [15:24] <gary_poster> saw schema related error | |
| [15:24] <gary_poster> going to stop, make schema, and retry | |
| [15:30] <benji> yeah, I did a pull and make schema before my run, just in case | |
| [15:32] <gary_poster> ok, restarted on new ephemeral with changes made | |
| [15:33] <gary_poster> now really babysitting :-P | |
| [15:33] <gary_poster> argh | |
| [15:33] <gary_poster> fell over | |
| [15:34] <benji> :( | |
| [15:34] <gary_poster> dumb mistake | |
| [15:34] <gary_poster> retrying | |
| [15:34] <gary_poster> there we go | |
| [15:34] <gary_poster> ok, now leaving :-) | |
| [15:35] <frankban> benji: http://ec2-50-16-78-27.compute-1.amazonaws.com:8010/builders/lucid_lp/builds/1/steps/shell_8/logs/stdio | |
| [15:36] <bac> "baby sitting" + "fell over" is not good | |
| [15:36] <benji> frankban: what am I looking for? | |
| [15:36] <frankban> the results of a parallel test run | |
| [15:37] <frankban> benji: and it's doing another run... | |
| [15:37] <frankban> have you started it? | |
| [15:38] <benji> frankban: have I started what? Another run? no. That was probably triggered by a commit. | |
| [15:38] <frankban> benji: ah... ok | |
| [15:39] <benji> frankban: I'm still not sure what you would like for me to notice about the ouput. That it finished without hanging, perhaps? | |
| [15:41] <frankban> benji: yes, and only 4 failures... is the hang happening only using 8 cores? | |
| [15:41] <benji> gary_poster: ah, ok. Nope, we've seen a hang with just two, so the fact that you didn't get one is interesting. | |
| [15:42] <benji> frankban: note that the xx-bug.txt failure is a known issue in the trunk, the production buildbot reported the same failure a few hours ago | |
| [15:44] <frankban> benji: yes, I've seen | |
| [16:10] <gary_poster> actually, benji, frankban, I have not seen a hang lately with two cores | |
| [16:10] <gary_poster> only 4 failures is great | |
| [16:11] <gary_poster> benji, do you have failures on your run? I definitely do | |
| [16:18] <gary_poster> benji, maybe worth noting is that testrepository had not reported any errors. | |
| [16:19] <gary_poster> I wonder if this is some kind of "buffer filling too fast" problem | |
| [16:19] <gary_poster> triggered by having so many errors | |
| [16:20] <gary_poster> I'm not sure how many errors I'm going to end up with on this run, but "a lot" looks like arough guess | |
| [16:32] <gary_poster> benji, no hangs for me. trying to figure out a quick way to get results of run | |
| [16:38] <gary_poster> "subunit2pyunit < testoutput.txt" yields a fairly confusing result: only one error? | |
| [16:45] <gary_poster> benji, ok, yeah, I'm confused. I thought I saw a lot of errors flying by, but now when I look at the teed document, I see very few tracebacks. The only error I get from the command above is one for an issue that subunit itself seems to show as...successful? | |
| [16:45] <gary_poster> test: lib/lp/app/javascript/overlay/tests/test_overlay.html | |
| [16:45] <gary_poster> test: Could not communicate with subprocess | |
| [16:45] <gary_poster> tags: zope:error_with_banner | |
| [16:45] <gary_poster> successful: Could not communicate with subprocess | |
| [16:46] <gary_poster> ...riiiiight... | |
| [16:49] <benji> gary_poster: was eating lunch; reading backlog now | |
| [16:52] <benji> gary_poster: I have no failures in my non-ephemeral run | |
| [16:53] <benji> my run took just under an hour and had no errors or failures at all | |
| [16:53] <benji> I'm going to start another in an ephemeral container and see what that does | |
| [16:55] <gary_poster> benji, interesting | |
| [17:05] <gary_poster> benji, so, maybe my "I have tons of errors" was confused by the fact that I ended up searching into the previous run. not sure. in any case, the only issue I see in the tee'd file is the one I gave above. So I'm wondering what to do now, since I was unable to dupe. I was considering hacking testr to only start one process, and to include the --load-list that we are using, and see how that goes. Thoughts? | |
| [17:06] <benji> gary_poster: so the intent of your hack would be to run in a normal environment, but serialize instead of parallelize in order to see if we get failures or not, right? | |
| [17:09] <gary_poster> benji, not exactly. The intent would be to run a single process/container of what the eight core machine did, but exactly as it did. Specifically, I'm going to hack testr to make it think I only have one core (which will mean that it will run all the tests it is supposed to run in a single ephemeral lxc container); *and* I'll include --load-list=/home/gary/temp/tmp0... when I start testr, so only those tests ar | |
| [17:09] <gary_poster> e run | |
| [17:11] <gary_poster> If I succeed in triggering a hang, I at least have a recipe for triggering it locally. If I do not succeed, then it implies that not only does testr need to run those tests in an ephemeral lxc container, but also they must be in parallel; *or* my machine is sufficiently different from the ec2 machine that it doesn't trigger. | |
| [17:16] <gmb> gary_poster, So, I've lost a bunch of time this afternoon to my lp setup being hideously broken. I've now rebuilt it. Do you have any guidance for me re: bug 609986? | |
| [17:16] <_mup_> Bug #609986: layer setup failures don't output a failure message (they spew straight to console) <lp-foundations> <paralleltest> <Launchpad itself:Triaged> < https://launchpad.net/bugs/609986 > | |
| [17:16] <gary_poster> actually maybe I don't have to hack testr to not run in parallel; just don't use --parallel | |
| [17:16] <gary_poster> gmb sure, lemme get that back in my head. want to hang out for just a bit? | |
| [17:17] <gmb> gary_poster, Sure. Let me get Firefox running | |
| [17:17] <gary_poster> k | |
| [17:18] <gmb> Ah, crap, updates.. | |
| [17:19] <gary_poster> gmb, https://code.launchpad.net/~launchpad/zope.testing/3.9.4-p5 is something to talk about when you are ready | |
| [17:19] * gmb looks | |
| [17:19] <gmb> gary_poster, goldenhorde? | |
| [17:19] <gary_poster> gmb, yeah | |
| [17:19] <gmb> k | |
| [17:56] <benji> gary_poster: the ephemeral run completed with one failure: lp.services.job.tests.test_runner.TestTwistedJobRunner.test_memory_hog_job | |
| [18:02] <gary_poster> benji, I got that one in my testr run so far | |
| [18:03] <gary_poster> so, benji, we have an apparently intermittent test isolation error... | |
| [18:03] <gary_poster> and we are unable to trigger the hang with merely an lxc or an ephemeral lxc. | |
| [18:03] <gary_poster> I'm now adding testr to the mix | |
| [18:03] <gary_poster> and if that does not hang | |
| [18:04] <gary_poster> then we only have the two options that I mentioned above as the possible causes, afaik | |
| [18:04] <gary_poster> I ended up only hacking my .testr.conf for what I wanted | |
| [18:05] <gary_poster> and then running testr run | |
| [18:06] <gary_poster> but to try and dupe the eight-way parallel run...I'm not sure how to do that, except to merely force my two-core machine to be treated as an eight-core machine by testr | |
| [18:06] <gary_poster> which does not necessarily use the same test divisions | |
| [18:06] <benji> yep, I agree with your evaluation of what the different outcomes suggest | |
| [18:06] <gary_poster> and also demands more RAM than I have, according to the experience I had yesterday | |
| [18:06] <gary_poster> tests are still running here | |
| [18:07] <gary_poster> the new run is only about 20 minutes old | |
| [18:07] <benji> k | |
| [18:08] <gary_poster> so we may need to discuss how to instrument the ec2 machine | |
| [18:08] <gary_poster> while we are waiting for the test results here | |
| [18:08] <gary_poster> they might inform any result really | |
| [18:08] <gary_poster> you mentioned the signal handler, and the debug build | |
| [18:09] <gary_poster> I like the signal handler better than the debug build, because it changes less | |
| [18:09] <gary_poster> and yet might still give us what we need. | |
| [18:09] <gary_poster> (it almost seems like something that one always ought to run with) | |
| [18:09] <gary_poster> we could also try that gdb hook trick | |
| [18:10] <gary_poster> that lets you get into a Python process | |
| [18:11] <frankban> gary_poster: EOD, my ec2 test run is still going, do you want me to leave those instances up? | |
| [18:11] <gary_poster> frankban, ack. benji, I think he can kill them. what do you think? | |
| [18:13] <benji> gary_poster, frankban: yeah I say kill them; I don't think we'll need them. | |
| [18:13] <gary_poster> frankban, thank you. Have a great evening. | |
| [18:13] <frankban> gary_poster, benji: ok, have a nice evening | |
| [18:13] <benji> same to you, frankban | |
| [18:14] <gary_poster> ah right, we can just sudo apt-get install python-dbg to get the debug build, can't we | |
| [18:14] <benji> gary_poster: this looks like what we're looking for http://pypi.python.org/pypi/faulthandler/ | |
| [18:14] <benji> gary_poster: I believe so. | |
| [18:15] <benji> gary_poster: I think your point about holding off on using the debug build is a good one | |
| [18:16] <gary_poster> benji, nice package. the only thing that strikes me that might bite us there is testr/subunit eating things... | |
| [18:16] <gary_poster> it might still work | |
| [18:16] <gary_poster> but the dance would be thisL | |
| [18:16] <gary_poster> : | |
| [18:17] <benji> there is an option for making it write to a file | |
| [18:17] <gary_poster> send signal to Python process | |
| [18:17] <gary_poster> ah! | |
| [18:17] <gary_poster> mhm...we would need access to the ephemeral container | |
| [18:17] <benji> register(signum, file=sys.stderr, all_threads=False, chain=False) | |
| [18:18] <benji> we can use the console for that | |
| [18:18] <gary_poster> in order to look at the file | |
| [18:18] <benji> since they hang, they don't go away :) | |
| [18:18] <gary_poster> as long as we do the root passwd/shadow file trick yeah | |
| [18:18] <benji> yep | |
| [18:18] <gary_poster> need to remember to do that first | |
| [18:18] <gary_poster> tests are still rolling along here | |
| [18:19] <gary_poster> ok...at 2:19, if I start a macine and get it initialized it would be ready by 3:20 ish | |
| [18:19] <benji> actually, don't we have access to the "upper" directory? we can do the shadow trick there if we need to (but doing it before launch would be easiest) | |
| [18:19] <benji> gary_poster: I have a slave ready | |
| [18:19] <gary_poster> benji, ooh, 8 core? | |
| [18:19] <benji> gary_poster: darn, no | |
| [18:20] <gary_poster> :-/ | |
| [18:20] <gary_poster> benji, want me to start one, or you? | |
| [18:21] <gary_poster> it may be trickier than I want it to be | |
| [18:21] <gary_poster> because of the new juju changes announced last night | |
| [18:21] <benji> gary_poster: have at it | |
| [18:21] <gary_poster> I was relying on something they just ripped out and replaced | |
| [18:21] <gary_poster> ok | |
| [18:22] <benji> actually, there has been some discussion about not ripping out the old options but leaving them for backward compatability | |
| [18:22] <gary_poster> yeah I saw that | |
| [18:23] <gary_poster> it makes sense to me not even for backwards compatibility but for setting defaults | |
| [18:27] <gary_poster> ok, slave is starting. tests are still running locally. stepping away. | |
| [18:28] <bac> hey gary_poster, can we have a quick chat to see if i can lend you a hand? | |
| [18:28] <gary_poster> bac, hey, 1 sec | |
| [18:28] <bac> gary_poster: np, i'll grab some tea | |
| [18:28] <gary_poster> cool | |
| [18:35] <gary_poster> bac, I await you in the horde (https://talkgadget.google.com/hangouts/extras/canonical.com/goldenhorde_ | |
| [18:35] <gary_poster> https://talkgadget.google.com/hangouts/extras/canonical.com/goldenhorde | |
| [18:37] <gary_poster> benji, I have a call at 4 with Francis, btw, so you will need to take over | |
| [18:37] <gary_poster> then | |
| [18:37] <benji> ok | |
| [19:38] <gary_poster> benji, http://ec2-174-129-101-121.compute-1.amazonaws.com:8010/waterfall | |
| [19:38] <gary_poster> benji, I have added root passwd | |
| [19:40] <gary_poster> benji, so I should start a test run | |
| [19:40] <benji> gary_poster: sounds good | |
| [19:40] <benji> after that we'll just be watching it, right? | |
| [19:40] <gary_poster> benji, now I will add you to ssh | |
| [19:40] <gary_poster> yeah | |
| [19:40] <gary_poster> this may have been foolish :-( | |
| [19:41] <benji> how so? | |
| [19:41] <gary_poster> if yesterday is any indication, hang is in > 2 hours | |
| [19:41] <gary_poster> past both of our EoDs | |
| [19:42] <gary_poster> maybe one of the cores will hang sooner | |
| [19:42] <gary_poster> benji, oh argh | |
| [19:42] <gary_poster> should I not have installed the package, or at least python-dbg, before starting a test? | |
| [19:44] <benji> gary_poster: we need to install faulthandler and register a handler for USR1 that will write all thread's stacktraces to a file; oh and tweak /etc/shadow | |
| [19:44] <benji> the "register a hanlder" bit might be interesting, probably hacking bin/test would be the easiest way | |
| [19:45] <benji> oh, and the package needs to be installed in the container | |
| [19:45] <benji> gary_poster: you may be right, we might be too late in the day to do this right; maybe we should scrub | |
| [19:45] <gary_poster> benji, I already changed /etc/shadow in root and added you to authorized keys. try ubuntu@ec2-174-129-101-121.compute-1.amazonaws.com | |
| [19:45] <gary_poster> or scrub ;-) | |
| [19:46] <benji> gary_poster: Permission denied (publickey). | |
| [19:46] <gary_poster> benji, one thing you could do is make an LP branch that has the package installed | |
| [19:46] <gary_poster> for tomorrow | |
| [19:46] <gary_poster> I would suggest actually hooking it in at a different location | |
| [19:47] <gary_poster> benji, try adding it to lib/lp_sitecustomize.py | |
| [19:47] <gary_poster> that will register it for every LP process | |
| [19:47] <gary_poster> which is what we want I think | |
| [19:48] <gary_poster> and is easy to do | |
| [19:48] <gary_poster> If I were going to do it today I would actually use python-dbg | |
| [19:48] <gary_poster> because that's simpler | |
| [19:48] <gary_poster> I just kill the test | |
| [19:48] <gary_poster> install -dbg | |
| [19:48] <gary_poster> and restart | |
| [19:49] <gary_poster> when there is a hang, give it a whirl with gdb | |
| [19:50] <benji> gary_poster: I'd really like to finish at least a section of my review today, so I prefer the option of killing the slave and I make a branch and tweak lp_sitecustomize | |
| [19:51] <gary_poster> cool | |
| [19:51] <gary_poster> I wonder what I did wrong with authorized_keys... | |
| [19:52] <gary_poster> benji, for future reference, I simply added your key (the line from https://launchpad.net/~benji/+sshkeys) to /home/ubuntu/.ssh/authorized_keys . Did I need to do anything else? | |
| [19:53] <gary_poster> Maybe ec2 security thing... | |
| [19:54] <benji> gary_poster: I would have thought that would work | |
| [19:54] <benji> I'm pretty sure I've done just that in the past | |
| [19:56] <gary_poster> yeah, already set to allow 22 through in ec2 | |
| [19:56] <gary_poster> fr everyone | |
| [20:05] <gary_poster> benji, still watching while waiting for call. does top lie? this is what it i saying | |
| [20:05] <gary_poster> Tasks: 505 total, 1 running, 504 sleeping, 0 stopped, 0 zombie | |
| [20:05] <gary_poster> Cpu(s): 0.1%us, 0.1%sy, 0.0%ni, 99.8%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st | |
| [20:05] <gary_poster> this is while I have eight parallel tests going | |
| [20:05] <benji> gary_poster: I haven't seen top lie lately. (I do remember on some old red hat machines ZC once had...) | |
| [20:07] <gary_poster> some tests are still running | |
| [20:07] <gary_poster> just not very fast | |