Ember tests not running on Cento6 in ci mode

[tuhintshukla]

I am running into this issue in my environment:-
When running ember tests in the ci mode, the call never returns and hangs. I can confirm this by looking at the following log:-
When I run DEBUG=* ember test ci I can see that the thread is stuck at this point:

express:router:layer new /^/(?:[0-9]+)(/.+)$/ +0ms
express:router:route get /^/(?:[0-9]+)(/.+)$/ +1ms
express:router:layer new / +0ms
express:router:route new /^/(?:[0-9]+)(/.+)$/ +0ms
express:router:layer new /^/(?:[0-9]+)(/.+)$/ +0ms
express:router:route post /^/(?:[0-9]+)(/.+)$/ +0ms
express:router:layer new / +0ms
express:router:route new /^(.+)$/ +0ms
express:router:layer new /^(.+)$/ +0ms
express:router:route get /^(.+)$/ +0ms
express:router:layer new / +0ms
express:router:route new /^(.+)$/ +0ms
express:router:layer new /^(.+)$/ +0ms
express:router:route post /^(.+)$/ +1ms
express:router:layer new / +0ms
express:router use / +0ms
express:router:layer new / +0ms

If I use firefox in ci mode instead of phantom the call returns with this error in the end:-
not ok 1 Firefox - Browser "firefox -no-remote -profile /tmp/testem.firefox http://localhost:7357/4691" exited unexpectedly.

Following are my environment details:-
ember-cli: 2.5.0
node: 4.2.1
os: linux x64
testem --version
1.7.1
phantomjs -v
2.1.1
[satest@:~]$ which phantomjs
/usr/bin/phantomjs
Centos:6.7

testem.json looks like this:-
{
"framework": "qunit",
"test_page": "tests/index.html?hidepassed",
"disable_watching": true,
"launch_in_ci": [
"PhantomJS"
],
"launch_in_dev": [
"PhantomJS",
"Chrome"
]
}

Any suggestions/resolutions/workarounds ?

Thanks.

[johanneswuerbach]

Could you try starting ember test --serve and check, whether firefox starts properly?