ZeroMq IRC Log

Thursday April 7, 2011

[Time] Name	Message
[05:39] sustrik	achin: you need zeromq 2.1.4 aside of pyzmq 2.1.4
[10:38] mile	evax, thanks for the erlzmq patch
[10:38] mile	but sadly, it diesn't work
[10:38] mile	I just got around to try it
[10:39] autotron	any folks here use the nodejs binding ?
[10:49] onr	autotron: is there a nodejs binding?
[10:49] autotron	onr: https://github.com/JustinTulloss/zeromq.node
[11:05] onr	autotron: looks neat
[12:26] pieterh	hi folks
[12:34] achin	sustrik__, ah, ok, thanks. i didn't think to do that since there is no "2.1.4" tag or branch in the libzmq repo. i guess i'll have to download a tarball
[12:45] pieterh	achin: we started making stable releases of 0MQ a few months back
[12:45] pieterh	what's in the repo is generally unstable and only for those wanting to test the latest code
[12:50] achin	there's a v2.1.0 tag in the repo, so i guess i would have expected to find a v.2.1.4 tag as well
[12:50] pieterh	achin: for various reasons, we split the release process off the development process
[12:51] pieterh	so there are separate repos for releases, which do have the tags
[12:51] pieterh	we're probably going to merge these back into the libzmq repo at some point
[12:52] achin	ok, that's good to know, thanks
[12:52] pieterh	the 2-1 release repo is at https://github.com/zeromq/zeromq2-1
[12:53] pieterh	there is an intention to broaden the "release" to include other projects, such as bindings
[12:53] achin	ahh, that's really the repo i should be using
[12:54] pieterh	well, unless you specifically want a git (e.g. to work on the code) you should take the packages
[12:54] pieterh	they are recent, fresh, stable
[12:55] achin	i thought i would try the latest, but i was having issues building pyzmq, so i'm going to back up a step and use the latest [matching stable] versions for both
[12:56] pieterh	yeah, the libzmq master has morphed into 3.0, so you want the 2.1.4 tarball
[12:56] pieterh	this should be indicated on the pyzmq page
[13:09] achin	pieterh, using both zmq 2.1.4 and pyzmq 2.1.4, everything builds cleanly, as expected
[13:09] pieterh	achin: nice
[13:09] pieterh	achin: it'd be worth fixing whatever path you followed, so others get this right
[13:11] achin	i checked out master of the libzmq repo. this built cleanly. i then checked out master from the pyzmq repo, which had problems building against libzmq master
[13:11] pieterh	so why did you go to the libzmq master?
[13:12] achin	good question
[13:12] pieterh	I assume you started at www.zeromq.org?
[13:12] achin	i did. i'm trying to find the page/link that pointed me to libzmq
[13:13] pieterh	let's find it and fix it, that's a trap for the unwary
[13:14] pieterh	possibly via this page: http://www.zeromq.org/bindings:python?
[13:14] achin	well, that page got to me the pyzmq repo
[13:15] achin	i think i might have wandered around until i found this: http://www.zeromq.org/docs:source-git
[13:15] achin	and thought "ooh, i like github, let me play here"
[13:16] pieterh	ok, I'll add a note on that page
[13:18] achin	i sometimes like to track a git repo instead of downloading tarballs because i find a "git checkout [new tag]" is quicker than navigating to a webpage to get a new URL to download
[13:19] pieterh	achin: OK, I'll add a link to the tagged repo on the download page
[13:20] achin	that sounds great. thanks
[13:22] pieterh	achin: can you check http://www.zeromq.org/intro:get-the-software and see if that makes sense?
[13:23] achin	sorry, i don't see anything that looks different
[13:24] pieterh	links to the two gits, just after the download packages
[13:24] pieterh	too subtle?
[13:25] achin	maybe the old page is stuck in some cache? this is what i see: http://i.imgur.com/YtdT6.png
[13:26] pieterh	wikidot does quite aggressive caching, try reloading?
[13:26] achin	oh wait. yeah, after mashing F5, i see it now
[13:26] pieterh	ok
[13:26] achin	that looks perfect
[13:27] pieterh	it's true that git is quite a nice way to get code
[13:27] pieterh	great!
[13:27] achin	git fetch, git tag -l oh, somethign new git checkout
[13:31] achin	thanks for the help, and thanks for being so aware of your users' experiences. i now can start hacking out neat distributed applications
[13:35] mikko	pieterh: msvc
[13:35] pieterh	achin: np, it's always fun to improve the 'experience'
[13:36] pieterh	mikko: hi!, and a good msvc to you too
[13:36] mikko	http://build.zero.mq/view/libzmq%202.1/job/libzmq2-1_MSVC-win7/10/console
[13:36] mikko	same thing with 2-2
[13:36] mikko	not sure what it is
[13:36] mikko	apart from that all succeeding
[13:37] pieterh	hmm, could it be some code that leaked in from 3.0?
[13:37] mikko	it's possible
[13:37] pieterh	I'll fire up my win xp box and give it a shot
[13:37] mikko	but 3.0 succeeds that build
[13:37] mikko	it looks like openpgm related
[13:37] mikko	i've seen this before
[13:37] pieterh	ah, only with WithOpenPGM
[13:38] pieterh	it's only this, right? :
[13:38] pieterh	..\..\..\src\connect_session.cpp(46): error C2511: 'void zmq::connect_session_t::start_connecting(BOOL)' : overloaded member function not found in 'zmq::connect_session_t'
[13:38] mikko	i think so
[13:38] mikko	might be related to definition of bool?
[13:39] pieterh	looks something like that
[13:49] pieterh	mikko: it's definitely in the pgm layer in libzmq
[13:50] pieterh	I'd suggest bubbling this up to steve
[14:07] evax	ok, the patch didn't work, but I reproduced and fixed it including stddef.h in vector.h AND removing the ifndef/typedef
[14:09] stevan	I am running into issues trying to compile jzmq on Mac OS X, it seems to fall into a recursive hole and never stop compiling the java files
[14:09] stevan	anyone seen this before?
[14:10] stevan	oh wait, wow, nevermind
[14:11] stevan	(attempting to compile unfamiliar libs in unfamiliar languages very late at night)--
[14:22] evax	(oops wrong window, sorry for the noise)
[14:48] NikolaVeber	evax, thanks for the patch
[14:50] NikolaVeber	I still have one problem though, I'm not sure if it has anything to do with the architectural issues, similar to the bug
[15:06] NikolaVeber	solved :)
[15:07] evax	NikolaVeber: oh, better yet :)
[15:08] NikolaVeber	I forgot the -pa argument to erl
[15:08] NikolaVeber	idiotic :/
[15:08] evax	use kerl :)
[15:10] NikolaVeber	http://sourceforge.net/projects/kerl/ ??
[15:10] evax	https://github.com/evax/kerl
[15:11] evax	:)
[15:14] evax	NikolaVeber: I only checked github before choosing the name, I missed this one :\
[15:21] NikolaVeber	evax, looks good... :)
[15:21] NikolaVeber	just that google doen't know that much about it yet :)
[15:22] NikolaVeber	and docs look very very nice, KUDOs
[15:25] evax	NikolaVeber: thanks ! btw erlzmq2 is agnerized, so once you have a kerl installation activated, you can install it with "agner install erlzmq" and it will be available on your next erl invocation
[15:30] NikolaVeber	cool
[15:30] NikolaVeber	I'll definitely have a look into it!
[15:45] NikolaVeber	evax, I found another inconsistence since the version a couple of weeks ago
[15:45] NikolaVeber	{ok, C} = erlzmq:context(),
[15:45] NikolaVeber	{ok, S1} = erlzmq:socket(C, req),
[15:45] NikolaVeber	erlzmq:send(S1, "Hello"),
[15:45] NikolaVeber	** exception error: no function clause matching erlzmq:send({1,<<>>},"Hello")
[15:45] NikolaVeber	in function mytest:request/2
[15:45] NikolaVeber	this code worked fine then
[15:46] NikolaVeber	oh, I've just seen the test file
[15:47] NikolaVeber	works like a charm!
[16:23] dale18	In the case where there is one publisher and one subscriber, should it be identical which socket binds and which one connects? It looks like if the publisher is the one connecting, it acts like a durable publisher and won't drop messages if there is no subscriber (this is different from what's in the documentation?)
[16:30] pieterh	dale18: it should be identical, yes
[16:30] pieterh	if you have a simple test case where the publisher is not dropping messages, post it, thanks
[16:31] dale18	okay, I do have a simple minimal example. where should I post it, right here? (it's about 10 lines of code for the publisher and the subscriber)
[16:31] pieterh	send it to the mailing list, and put the source code in a pastebin, e.g. github gist
[16:31] pieterh	also, log an issue on the libzmq repository, so it doesn't get forgotten
[17:10] paupau	Anyone used ÃMQ on iOS?
[17:11] paupau	I've compiled it successfully at least and I guess kqueue is supported internally and all
[17:12] paupau	I wonder if it's a good idea re: things like wireless radio/battery life
[17:12] paupau	I guess that's an iOS-specific question though.
[17:13] paupau	Mostly just wondering if anyone else has experience with that
[17:15] pieterh	hi paupau
[17:15] pieterh	by default 0MQ doesn't do anything that would use the radio unless you ask it to
[17:15] pieterh	there are a few tricks like using a tickless timer in poll loops
[17:16] paupau	cool
[17:16] pieterh	but you build these yourself, on top of 0MQ
[17:16] pieterh	there's an example at the end of Ch4 of the Guide
[17:17] pieterh	you also need to do heartbeating properly, if you're using a mobile device
[17:17] paupau	hmm hmm
[20:07] pieterh	mikko: you around?
[20:20] eyeris	I'm trying to get pyzmq up and running on Windows. After a setup.py build and install, I get an import error "No module named win32api"
[20:23] eyeris	I've googled for a package named win32api, but nothing obvious comes up. There's no win32api package on pypi. There's something called PyWin32, but it seems to only be available with the ActiveState dist
[20:25] eyeris	Oh, wait, nvm. That's the package and it's now on sf.net
[20:36] mikko	pieterh: yes
[20:36] pieterh	mikko: I've fixed the libzapi errors for win32
[20:36] pieterh	it should build on mingw properly now
[20:36] mikko	let me try
[20:36] pieterh	selftests pass OK and everything... :)
[20:39] pieterh	mikko: it got a lot further, failed with something post-build afaics
[20:40] mikko	yeah
[20:40] mikko	noticed that coverage was on for some reason
[20:40] mikko	sec
[20:42] pieterh	success!
[20:43] mikko	cool
[20:43] mikko	almost everything for 2-1 and 2-2 succeeding now
[20:43] pieterh	yeah, very cool indeed...
[20:43] pieterh	next is to build and test the 90+ guide examples in 10 languages...
[20:43] pieterh	just kidding :)
[20:46] mikko	interesting thing is that libzmq_GCC-linux_s390x tests succeed consistently now
[20:46] mikko	and for 2-1 and 2-2 shutdown_stress fails
[20:46] pieterh	same OS & box?
[20:47] mikko	yes
[20:48] mikko	i wonder if something has changed in 30
[20:48] mikko	3.0*
[20:49] sustrik	i've lowered the number of iterations
[20:49] sustrik	so it's not that invasive
[20:50] jond	mikko, pieterh: quick question if i checkout 'master' from libzmq that's pretty much the latest release yes? the 3.0 stuff is on the pre3.0 branch?
[20:50] pieterh	jond: nope, the 3.0 stuff is now merged into master
[20:50] pieterh	if you want the latest stable release, see the main download page
[20:51] pieterh	sustrik__: can you tell me where to change that in 2.1?
[20:51] jond	pieterh: i never use the releases!
[20:51] pieterh	jond: like I said, see the main download page
[20:51] mikko	sustrik__: that explains
[20:51] pieterh	unless you specifically want the unstable latest master
[20:51] mikko	sustrik__: have you seen this error before:
[20:51] sustrik	pieterh: tests/test_shutdown_stress.cpp
[20:51] mikko	https://build.zero.mq/view/libzmq%202.1/job/libzmq2-1_MSVC-win7/11/console
[20:52] mikko	i think this has been fixed once at some point somewhere
[20:52] mikko	but i really can't remember the details of it
[20:52] sustrik	mikko: that's steven redefining 'bool' in openpgm headers
[20:52] sustrik	he've fixed that afaik
[20:52] sustrik	what version of openpgm are you using?
[20:53] pieterh	mikko: the shutdown stress in 2.1 is the same as in 3.0 master
[20:53] pieterh	100 threads
[20:53] mikko	sustrik__: will check
[20:53] pieterh	ah, you changed it to 10 threads
[20:54] sustrik	yes
[20:54] pieterh	sustrik__: you didn't send me a patch
[20:55] sustrik	it was probably part of the patch that updated the tests for 3.0 api
[20:55] sustrik	just patch the number in 2.1
[20:55] mikko	5.1.102
[20:55] pieterh	sure
[20:55] mikko	i should probably update that
[20:55] sustrik	iirc it was fixed somewhere around 5.1.111
[20:56] mikko	i need to ask steven for newer installer package
[20:57] pieterh	mikko: ok, fixed shutdown stress tests on 2.1 and 2.2
[20:57] mikko	cool
[20:57] mikko	should be ok in the morning build
[20:57] mikko	i still need to add libzfl builds at some point
[20:57] mikko	what is the situation for 10th may?
[20:57] mikko	is it happening?
[20:58] pieterh	mikko: well, I have to pay the deposit for the room tomorrow
[20:58] pieterh	if we want it, it's cheap and nice
[21:00] pieterh	mikko: ok, random decision, it's on
[21:00] mikko	ok, cool
[21:00] mikko	i'll book eurostar at some point
[21:00] mikko	sustrik can't make it?
[21:00] mikko	Assertion failed: !sent && errno == EAGAIN, file test_hwm.cpp, line 53
[21:00] pieterh	sustrik will be recovering from vodak poisoning
[21:00] mikko	also interesting
[21:00] mikko	sustrik__: it would be cool if you can make brussels too
[21:00] mikko	hopefully ianbarber is coming as well
[21:01] mikko	he might be joining me from london
[21:03] pieterh	there's a few other people I'm working with in London who might come
[21:03] pieterh	I mean we could do the event in London
[21:03] pieterh	but I was there a couple of days ago and paid 10 pounds for a proper beer
[21:03] jond	mikko: do you have enough git-foo to explain how I get the sub forwarding stuff from the libzmq onto the zeromq2-1?
[21:04] mikko	jond: checkout 2-1, git remote add libzmq
[21:04] mikko	git cherry-pick <commit hash>
[21:04] mikko	and hope it merges cleanly :)
[21:05] mikko	pieterh: booking a proper room in london might be more expensive
[21:05] mikko	not sure
[21:05] jond	mikko: but the subforwarding is a branch? does that make a difference?
[21:05] pieterh	yes, in Brussels too, this place is especially nice for that
[21:05] mikko	jond: shouldn't
[21:05] pieterh	jond: we can merge the subforwarding onto 2-2, but not 2-1
[21:06] jond	pieterh: can that be done on github?
[21:06] pieterh	jond, with git, yes
[21:07] jond	pieterh: so it would appear as branch of 2-2. if so that sounds easier?
[21:07] pieterh	jond... you can create a branch in 2-2, then pull the branch from libzmq, I guess
[21:08] jond	pieterh: ok, will report back....
[21:08] mikko	pieterh: http://skillsmatter.com/go/training-room-hire-clerkenwell
[21:08] mikko	i know that place in london for room hire
[21:08] mikko	are the prices a lot higher than brussels?
[21:09] pieterh	mikko: the room I'm renting has space for 50-100 people and costs 175 Euro and is right in the center
[21:09] mikko	that is pretty cheap
[21:10] mikko	brb
[21:42] jond	mikko: is this a new change that you do not see the compilation commands when building 2-2? eg CXX libzmq_la-clock.lo
[22:01] pieterh	jond: we backported that to 2.1 as well
[22:01] jond	pieterh: is there anyway to force it log the whole command elsewhere?
[22:02] pieterh	jond: checking...
[22:02] pieterh	./configure --disable-silent-rules
[22:03] jond	pieterh: thx