URLError: <urlopen error timed out>

[maxd]

Hi All,

This is issue depends to #963.

Traceback (most recent call last):
  File "/usr/share/datadog/agent/checks/__init__.py", line 498, in run
    self.check(copy.deepcopy(instance))
  File "/usr/share/datadog/agent/checks.d/docker.py", line 151, in check
    containers = self._get_containers(instance, with_size=True)
  File "/usr/share/datadog/agent/checks.d/docker.py", line 243, in _get_containers
    return self._get_json("%(url)s/containers/json" % instance, params={'size': with_size})
  File "/usr/share/datadog/agent/checks.d/docker.py", line 264, in _get_json
    request = self.url_opener.open(req)
  File "/usr/lib64/python2.6/urllib2.py", line 391, in open
    response = self._open(req, data)
  File "/usr/lib64/python2.6/urllib2.py", line 409, in _open
    '_open', req)
  File "/usr/lib64/python2.6/urllib2.py", line 369, in _call_chain
    result = func(*args)
  File "/usr/share/datadog/agent/checks.d/docker.py", line 107, in unix_open
    return self.do_open(UnixHTTPConnection(unix_socket), new_req)
  File "/usr/lib64/python2.6/urllib2.py", line 1165, in do_open
    raise URLError(err)
URLError: <urlopen error timed out>

As you can see try-except doesn't catch URLError exception. Maybe this is platform specific problem. DataDog agent is running on CentOS 6.5.

Can you fix it in next release?

Thanks

[remh]

Thanks for your feedback @maxd !
@LotharSee Can you add that in your Docker work please ?

[LotharSee]

Sure!

The error happens at the urllib2 level instead of the socket level, that's interesting. If the source is the same, then catching it will be enough.
To be sure, @maxd can you tell me how many containers were running? Do they modify their own file system? Some system info (such as Kernel/Docker/Agent version) may also help me.
Thanks!

[maxd]

can you tell me how many containers were running?

At present each docker node has about 10 containers.

Do they modify their own file system?

I can't say exactly. But I think most of them don't write to own file system (except logging).

Some system info (such as Kernel/Docker/Agent version) may also help me.

https://gist.github.com/maxd/3ebe878b54d3be78cc18

[remh]

Fixed with Agent 5.0.0