IRC log of #maemo for Sunday, 2018-09-30

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DocScrutinizer05folks. a coredump can be done with the process keeping running, right?08:33
KotCzarnyyes, with gdb08:41
KotCzarny(and probably other tools)08:42
DocScrutinizer05yeah, but obviously not with standard signal means08:50
DocScrutinizer05see man 2 signal and man 5 core08:50
DocScrutinizer05both say coredump implies process termination08:51
DocScrutinizer05well, to avoid falling for XY problem: infobot stops for a >2h each night at 00:20 UTC, and neither Tim (owner) nor I have any idea what's causing this. How would you try to tackle this shit?08:53
KotCzarnyit's not sigcore, but just a type of signals08:53
KotCzarnyie. sigquit is core too08:53
DocScrutinizer05I know08:54
KotCzarnyas for the bot, check cron?08:54
KotCzarnyor scripts the bot is using, might be some log managing08:54
KotCzarnyor db rehash08:54
DocScrutinizer05I suggested this to Tim a dozen times already. Even suspected logrotate the culprit. No reply by Tim08:55
KotCzarnydo you have access to the box?08:55
DocScrutinizer05I need a commandline I demand him doing08:55
KotCzarnysome monitoring then?08:55
DocScrutinizer05now we're talking. What exactly=08:56
KotCzarnydisk/network usage08:56
KotCzarnyie. bot uploading something big08:56
DocScrutinizer05nothing too unusual08:56
KotCzarnyif it's a bot stoppping responding, it might be some script running and blocking everything else08:57
KotCzarnywhich would mean turning that script to run in parallel might help08:57
DocScrutinizer05to start with, I have no clear indication *why* the bot goes offline08:57
DocScrutinizer05I can remote-reboot the bot and already talked Tim into this reboot providing some diagnostic output. Alas I didn't find the one smart command to show what I need to know, about system status08:59
KotCzarnyit might be as simple as some script blocking the bot09:01
KotCzarnywhich obviously wouldnt show in most diagnostics09:01
DocScrutinizer05ps doesn't show anything suspicious09:01
KotCzarnyeasiest would be adding some debug log showing what funcs are starting and when09:02
KotCzarnyand popping that single print in most funcs09:02
DocScrutinizer05would seem like the bot goes OOM09:11
KotCzarnywhich would sound as some script trying to run big data09:12
DocScrutinizer05well yeah. I could speculate all day long. I have no clue what to talk Tim into, to *fix* the issue09:14
DocScrutinizer05~seen rimriker09:15
infobotDocScrutinizer05: i haven't seen 'rimriker'09:15
DocScrutinizer05~seen timriker09:15
infobottimriker <~TimRiker@bzflag/projectlead/TimRiker> was last seen on IRC in channel #infobot, 25d 10h 35m 30s ago, saying: 'added a netstat -ntp|grep perl'.09:15
KotCzarnyclearly he has no time to fix it, and no one else has the access, which basically boils down to nothing is going to be done09:15
DocScrutinizer05that's a pretty useless revelation09:16
KotCzarnybut clearly directs to the deeper issue09:16
KotCzarnyyou can speculate all day long, without results09:16
DocScrutinizer05do you want to tell me you're short of ideas how to tackle this? Noted09:17
DocScrutinizer05I'm too, right now09:18
KotCzarnyi've already shared few ideas, but without access they are unusable09:18
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DocScrutinizer05I have 'access', just not the type of access you might think of when you hear the term09:19
DocScrutinizer05>>saying: 'added a netstat -ntp|grep perl'<< is what results from my type of "access", I demanded for a netstat to rule out uplink clogging09:20
KotCzarnynah, it more sounds as some homecleaning script running in the bot09:21
DocScrutinizer05and I can trigger this and all the other diagnostic rools by doing a bot reboot09:21
KotCzarnywhich takes a while, doesnt hit big cpu/network, but still blocks further execution09:21
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DocScrutinizer05please check this it has some errors that might well be worth a closer look and inverstigation. alas the bot is perl and thus I'm totally lost. /join #infobot  for sourcecode etc09:27
DocScrutinizer05I gonna provide a reboot log based on operational state now09:38
infobotSince Sun Sep 30 02:25:36 2018, there have been 0 modifications, 0 questions, 0 dunnos, 0 morons and 0 commands.  I have been awake for 4h 13m 4s this session, and currently reference 119769 factoids.  I'm using about 80728 kB of memory. With 0 active forks. Process time user/system 12.89/0.57 child 0/009:38
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DocScrutinizer05gosh, does that PoS critter hang on reboot now?09:43
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KotCzarnycheck shell ulimits09:48
KotCzarnyulimit -a09:48
DocScrutinizer05well, when I want to tell Tim "please add a diagnostics line to check ulinit -a", I need a rationale WHY I think this is a relevant info, what we expect it to be, and what we hope to fix by messing with it09:50
KotCzarnyOut of memory!09:51
KotCzarnythis maybe09:51
KotCzarnywould be interesting to find that string exact in scripts09:51
DocScrutinizer05you seen the timestamps of those loglines in ibot's log?09:51
KotCzarnycould it could pinpoint the place where it does that big job09:52
KotCzarny(although it might be generic perl err msg)09:52
KotCzarnytimestamps or not, it probably has more than one problem09:53
DocScrutinizer05it is09:53
DocScrutinizer05fsckng bot hangs on reboot!!! >:-(09:55
KotCzarnyperlmonks link to debug things:
KotCzarnyalso suggests checking ulimit09:55
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DocScrutinizer05which actually migh be a GOOD thing, catching it while it does whatever it does when it takes 2h+ to re-login09:56
DocScrutinizer05ooh, no, that been me now, should stop messing with bot when tired09:56
KotCzarnymaybe it has some task to do which it tries to do for months but dies by killing09:57
DocScrutinizer05[2018-09-30 08:44:58] --> infobot (ibot@ has joined this channel.09:57
DocScrutinizer05[2018-09-30 08:44:58] *** ChanServ sets mode: +v infobot09:57
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infobotIt's great to be back!09:58
infobotSince Sun Sep 30 06:56:10 2018, there have been 0 modifications, 1 question, 0 dunnos, 0 morons and 0 commands.  I have been awake for 2m 11s this session, and currently reference 119769 factoids.  I'm using about 80264 kB of memory. With 0 active forks. Process time user/system 1.29/0.12 child 0/009:58
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infobot- Uptime for apt -09:58
infobotNow: 2m 24s running infobot 1.5.4 (SVN) -- linux09:58
infobot1: 59d 8h 41m 19s running infobot 1.5.4 (SVN) -- linux, ended Sun Nov 14 18:39:57 201009:58
infobot2: 57d 3h 9m 23s running infobot 1.5.4 (SVN) -- linux, ended Fri Jun 26 20:39:27 200909:58
infobot3: 53d 8h 24m 4s running infobot 1.5.4 (SVN) -- linux, ended Tue Nov  7 05:34:20 201709:58
KotCzarnyrandom crap to debug memory in perl:
KotCzarnymight actually be useful if you get a coredump and want to step through it10:01
KotCzarny (proper link)10:02
KotCzarny2g is being killed of around the world10:03
KotCzarnymight be the reason of lack of interest10:03
DocScrutinizer05yep, sure10:23
DocScrutinizer05yet there are amazing things going on, like Michaela Spacefalconia trying to re-release a  (Openmoko Freerunner) TI Calypso chipset based 2G modem module10:25
DocScrutinizer05I for one think ^^^ this stuff is more rewarding than Calypso10:27
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sicelostupid question - but i must ask nonethelese - the telco in my country uses overhead lines, and our area is also prone to lightning strikes in summer. what is the best way (besides disconnecting, of course) to protect the adsl modem/router from this?22:31
KotCzarnynothing protects you from direct (or even in neighbourhood) lightning hit22:33
KotCzarnymy friend had such incident few years ago22:33
KotCzarnylightning hit the house 2-3 buildings away22:33
KotCzarnyhis modem way flying across the room leaving sparks and burns trail22:34
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siceloat least no one's reported such here22:38
KotCzarnyi have heard few stories about ethernet networks hung around the neighbourhoods too, those tend to burn routers/switches first22:38
KotCzarnyso just dont worry and keep your data safe22:39
KotCzarnyie. store backups in different locations22:39
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sicelowell our modems dead now. no idea when isp will provide replacement.22:44
KotCzarnythere are some telephone line isolators, but as i've said, nothing protects from close hit22:45
KotCzarnysome power strips provide filtering for modem lines22:45
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siceloisp doesn't like those. :)22:46
KotCzarnythey just have to pass high freqs, while still protecting from voltage spikes22:46
sicelothey complained that it causes the signal to be 'sent back' to their more expensive equipment :D22:46
siceloi never got time to study how they really work to see if their claim was correct (i doubt)22:47
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KotCzarnythat might be true for some cheapo ones22:50
siceloguess we must be sure to disconnect then, assuming storm happens when we're around23:04
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