zeppelin won't start in hdp 2. 4 sandbox

[#1]

just downloaded and started a fresh 2.4 sandbox image. After starting the VM (looked normal), doing nothing else, and browsing to ambari, I noticed that Zeppelin wasn't running, and that's what I was about to use. The VM startup said Zeppelin was started. Tried to start it with Ambari and it didn't start. I tried this a few times with the same result.

There is a stack trace, any ideas? thanks.

Traceback (most recent call last):
  File "/var/lib/ambari-agent/cache/stacks/HDP/2.4/services/ZEPPELIN/package/scripts/master.py", line 235, in <module>
    Master().execute()
  File "/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py", line 219, in execute
    method(env)
  File "/var/lib/ambari-agent/cache/stacks/HDP/2.4/services/ZEPPELIN/package/scripts/master.py", line 179, in start
    self.update_zeppelin_interpreter()
  File "/var/lib/ambari-agent/cache/stacks/HDP/2.4/services/ZEPPELIN/package/scripts/master.py", line 196, in update_zeppelin_interpreter
    data = json.load(urllib2.urlopen(zeppelin_int_url))
  File "/usr/lib64/python2.6/urllib2.py", line 126, in urlopen
    return _opener.open(url, data, timeout)
  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/lib64/python2.6/urllib2.py", line 1190, in http_open
    return self.do_open(httplib.HTTPConnection, req)
  File "/usr/lib64/python2.6/urllib2.py", line 1165, in do_open
    raise URLError(err)
urllib2.URLError: <urlopen error [Errno 111] Connection refused>

[#2]

Just noted that this is 2.4_1 sandbox

[#3]

saw the suggestion to delete zero-length notebooks and deleted all notebooks. still gets the same error. service won't start.

[#4]

The error above just means Ambari wasn't able to autoconfigure interpreters (presumably because Zeppelin is not up).

Check logs (under /var/log/zeppelin/) to find the root cause of why Zeppelin is not starting

[#5]

This is the answer

https://community.hortonworks.com/questions/48665/after-sandbox-restart-zeppelin-wont-start.html

Find the empty note.json!