Unable to start server with default config

[Martin Dratva]

Hi,

I have installed janus and can not seem to start it, using basically default configs. I am using Arch Linux on Raspberry Pi 3 and I can't tell, whether there is issue with my system or I have found some strange bug, because googling did not really found anyone else having this problem.

Error:

[FATAL] [transports/janus_http.c:janus_http_init:689] Couldn't start webserver on port 8088...

[FATAL] [transports/janus_http.c:janus_http_init:805] No HTTP/HTTPS server started, giving up...

Logs: https://pastebin.com/2F49Ebap

Thanks for any help.

[Mirko Brankovic]

Maybe you can pastebin transport.http. config file?

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[Martin Dratva]

I believe it is vanilla config: https://pastebin.com/Lc1yCmLp

On Friday, April 14, 2017 at 6:55:36 PM UTC+2, Mirko Brankovic wrote:

Maybe you can pastebin transport.http. config file?

On Apr 14, 2017 18:15, "Martin Dratva" <martin...@gmail.com> wrote:

Hi,

I have installed janus and can not seem to start it, using basically default configs. I am using Arch Linux on Raspberry Pi 3 and I can't tell, whether there is issue with my system or I 

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[Alessandro Amirante]

Maybe port 8088 already taken?

A.

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[Martin Dratva]

I have checked that. It is not taken. I could start Python's SimpleHTTPServer on that port without any issue. I also changed janus configuration to different port with the same result. 

[Lorenzo Miniero]

I guess MHD_start_daemon (from the library we use for the web server) is returning NULL for you. Check the documentation for possible causes: https://www.gnu.org/software/libmicrohttpd/manual/html_node/microhttpd_002dconst.html

L.

[Bimalkant Lauhny]

Hello Martin,

I'm having same error! Were you able to solve this error? If yes, please share you experience.

Thanks.

[Martin Dratva]

Hi, 

I had a brief look at what Lorenzo suggested, but most of the issues in that documentation did not apply to me. 

At least those, I understood did not apply. I did not understood some. 

I gave up on janus and did not follow through with it, because I have found other solution to what I wanted to achieve. 

[Bimalkant Lauhny]

Thanks for replying Martin,

I guess I'll have to figure this one out on my own!

[Lorenzo Miniero]

Try a different port, or specifying IP/interface to bind to in the settings. Maybe binding to all (default) fails for some reason in your setup.

L.

[Mirko Brankovic]

Probably is libmicrohttp problem on specific environment.

Maybe you should paste your OS details where you are trying to build janus, so that someone can try in in virtual env.

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[Bimalkant Lauhny]

I'm using Arch Linux.

This is the output of 'uname -a' command -

Linux BitBox 4.10.9-1-ARCH #1 SMP PREEMPT Sat Apr 8 12:39:59 CEST 2017 x86_64 GNU/Linux

[Bimalkant Lauhny]

One thing more!

I'm using janus from past 2 months. Earlier it worked. There wero no such errors.

This is the error -

[FATAL] [transports/janus_http.c:janus_http_init:686] Couldn't start webserver on port 8088...

Before it started giving this error, I had updated and downgraded janus a few times for development purposes.
As far as I remember, it suddenly stopped working, maybe 2 weeks ago.

[Lorenzo Miniero]

Try going back commits until you find the one that breaks it for you (just in case a commit's the cause).

L.

[Ju Ju]

I had the same pb once after a change in the config file (janus transport http conf file)  I have to re install (just a new make install) janus to solve it.

I couldn't see any issue in the config file but obviously there was...

[Bimalkant Lauhny]

Thanks for replying Lorenzo and Ju Ju,

For dev purposes, I'm constantly doing reinstallations for different commits....
I have been tracking the commits from version 0.2.1 (commit done in October 2016).

Still, no success!

So, I guess, installation is not the problem.
May be it's associated with dependencies.
Currently, I'm quite busy due to academics (exams and practicals!).. Therefore I'm not able to get into dependencies (Mirko's suggestion!).
I'll have a look into that this weekend and let u all know the results.

Thanks to all of you for your support...

[Bimalkant Lauhny]

As Mirko had suggested, I reinstalled libmicrohttpd. It didn't work.

Then I removed and reinstalled all the dependencies. Again, it didn't work.

There is one more error that I noticed :

'[ERR] [plugins/janus_voicemail.c:janus_voicemail_init:362] Unknown error -1'.

Are these related? I mean, is it like HTTP/HTTPS server start failure is related to this error??

Thanks...

[Mirko Brankovic]

Seems to me that you have some permitions issue. Not sure about http server, but voicemail plugin defenatelly can't create dir probably stated in conf file and returns -1. // No point of going further.

Try to change all dirs to /tmp maybe or run as root once as a test 

[Bimalkant Lauhny]

Thanks for reply Mirko.

I tried to run janus with root permissions. The 'voicemail' error is gone.
But, the server error is still there.

Should I try changing directories to '/tmp'?

[Mirko Brankovic]

Well it is not a good practice to ran anything as a root, so better think of a place where janus can have r+w permissions for voicemail.

Though http is still a problem

--

[Lorenzo Miniero]

Have you tried with a different OS? Try bringing this issue to the libmicrohttpd or Arch Linux forums, because I don't think it's Janus related.

L.

[Eirik Sletteberg]

I'm experiencing the same problem, on Mac OS. I've tried changing ports, interfaces or ip addresses, that doesn't help. Using v0.2.2 of the gateway, pretty much a vanilla config.

When I compile the same codebase in Ubuntu 17.04, inside a Docker container, it works like expected.

It could be a problem with libmicrohttpd...

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[Lorenzo Miniero]

Have you guys tried playing with the interface/ip to bind to in the http plugin settings as I suggested? Just to check if it's a problem binding to one that causes all to fail, as by default it tries to bind to all available interfaces.

L.

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[Eirik Sletteberg]

I tried to bind to ip addresses 127.0.0.1 and/or 0.0.0.0, port 1339/random numbers, interface eth0, eth1, lo0, in all combinations, with no luck.

[Mirko Brankovic]

I have the same problem with latest code.

Same for any interface and for specific ones.

I'll try to trace which commit brakes it

[Mirko Brankovic]

On Fedora

I see I have this microhttpd:

libmicrohttpd.x86_64                                             1:0.9.53-1.fc25 

and reverting back to:

libmicrohttpd.x86_64                                             0.9.46-2.fc24                                             

And I got it running, so something in those 2 are braking

HTTP webserver started (port 8088, /janus path listener)...

[Lorenzo Miniero]

I am on Fedora too, and I'm still on 0.9.46, which might explain why it's working fine for me. From a quick look at the changelog, it looks like they renamed some MHD_ flags, that is those you pass when creating the daemon: anyway, the old names should still be valid, as they say "Old flag names are supported for backward compatibility", so it shouldn't be the cause.

Have you checked if configuring a thread pool size instead of "unlimited" works instead?

L.

[Mirko Brankovic]

Indeed, "unlimited" is braking it.

Using a thread pool of size 20 the Janus API HTTP webserver

Binding to IP '127.0.0.1' for the Janus API HTTP webserver

HTTP webserver started (port 8088, /janus path listener)... 

But how to use thread per connection now?

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Regards,

Mirko

[Lorenzo Miniero]

Just upgraded to make some tests myself, and apparently the cause is MHD_USE_POLL: when you remove that, the daemon starts. Anyway, that sucks, because if you don't use poll, you use select, which has several limitations. My guess is that the installed libmicrohttpd version has been compiled thinking poll is not available and so it fails, which shouldn't happen.

I'll write on the MHD library to notify this. For the time being, stick to older versions of the library, or try to compile/install the latest version manually to see if the MHD_USE_POLL error goes away (no time to make such tests myself).

L.

[Lorenzo Miniero]

It's not the "unlimited", it's MHD_USE_POLL. The thread pool works because we don't use MHD_USE_POLL there.

L.

[Lorenzo Miniero]

FYI, http://lists.gnu.org/archive/html/libmicrohttpd/2017-04/msg00014.html

L.

[Lorenzo Miniero]

Dear all,

please let me know if this PR fixes it for you:

https://github.com/meetecho/janus-gateway/pull/870

If so (it works for me with 0.9.53 on Fedora 25) I'll merge soon.

Lorenzo

[Mirko Brankovic]

It is ok for me, but similar/same ENV:

- basic config

-  log

Using a thread per connection for the Janus API HTTP webserver
Binding to all interfaces for the Janus API HTTP webserver
HTTP webserver started (port 8088, /janus path listener)...

- version of microhttpd

Installed Packages

Name        : libmicrohttpd

Arch        : x86_64

Epoch       : 1

Version     : 0.9.53

FYI, http://lists.gnu.org/archive/html/libmicrohttpd/2017-04/msg00014.html

L.

Regards,

Mirko

[Eirik Sletteberg]

I can confirm that the PR fixes the issue for me.

fredag 14. april 2017 18.15.17 UTC+2 skrev Martin Dratva følgende:

Hi,

I have installed janus and can not seem to start it, using basically default configs. I am using Arch Linux on Raspberry Pi 3 and I can't tell, whether there is issue with my system or I have found some strange bug, because googling did not really found anyone else having this problem.

Error:

[FATAL] [transports/janus_http.c:janus_http_init:689] Couldn't start webserver on port 8088...

[FATAL] [transports/janus_http.c:janus_http_init:805] No HTTP/HTTPS server started, giving up...

Logs: https://pastebin.com/2F49Ebap

Thanks for any help.

[Lorenzo Miniero]

Merged!

L.

[Bimalkant Lauhny]

Thanks Guys. It's working for me too. I'm using 4.10.11-1-ARCH #1 SMP PREEMPT Tue Apr 18 08:39:42 CEST 2017 x86_64 GNU/Linux...