Zombies on Ubuntu 12.04

[mwf]

Hi!

At last, I'm reporting this bug =) I've promissed it since Yandex GoLang Meetup...

Cocaine leaves zombie processes after stopping application.
OS Ubuntu 12.04, Cocaine 0.11.1.0 or 0.11.2.0 (reproduced on both)

How to reproduce:

1. Start cocaine application (for example, Echo-application).
2. Make a call to start a worker.
   check ps aux | grep python and findout it has been started...
3. If worker is closed automatically (after 10 minutes timeout of inactivity), everything is fine!
   But if make cocaine-tool app stop -n <name> than check ps aux | grep python - it will return something like this:

ps aux | grep python
cocaine   4280  0.9  0.0      0     0 ?        Z    20:16   0:00 [python] <defunct>
ikorolev  4318  0.0  0.0   8112   928 pts/1    S+   20:16   0:00 grep python

After that, every shutdown worker (doesn't matter, was it closed manually or automatically) stays in system as zombie.

This is reproduced not only if having Python workers, but also Native.

[noxiouz]

This problem could be solved by using a new version of libev (4.15), but it's not an ideal solution.

[mwf]

This problem could be solved by using a new version of libev (4.15), but it's not an ideal solution.

Thanks!
Anyway, I'll wait for Ubuntu 14.04 release, and the problem will become deprecated =)