Github user bzz commented on the issue:
https://github.com/apache/zeppelin/pull/1689
Only the last CI profile fails on very strange curcumstances:
```
16/12/19 04:54:08 INFO ApplicationMaster: Deleting staging directory
.sparkStaging/application_1482123134765_0003
16/12/19 04:54:08 ERROR ApplicationMaster: Failed to cleanup staging dir
.sparkStaging/application_1482123134765_0003
java.net.ConnectException: Call From
testing-docker-7a57c244-e7fb-44fb-9664-5856f0534506/172.17.0.5 to
localhost:39393 failed on connection exception: java.net.ConnectException:
Connection refused; For more details see:
http://wiki.apache.org/hadoop/ConnectionRefused
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
```
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