Github user khalidhuseynov commented on the issue:
https://github.com/apache/zeppelin/pull/1675
rebased from master, and 6th profile keeps failing with Zeppelin shutting
down because of no `SPARK_HOME`. So initially fails to untar spark package:
```
+mkdir -p .spark-dist
+cd .spark-dist
+[[ ! -f spark-1.4.1-bin-hadoop2.3.tgz ]]
+cp spark-1.4.1-bin-hadoop2.3.tgz ..
+cd ..
+tar zxf spark-1.4.1-bin-hadoop2.3.tgz
gzip: stdin: unexpected end of file
tar: Unexpected EOF in archive
tar: Unexpected EOF in archive
tar: Error is not recoverable: exiting now
+echo 'Unable to extract spark-1.4.1-bin-hadoop2.3.tgz'
Unable to extract spark-1.4.1-bin-hadoop2.3.tgz
+rm -rf spark-1.4.1-bin-hadoop2.3
+rm -f spark-1.4.1-bin-hadoop2.3.tgz
+set +xe
```
and then in tests:
```
02:22:06,298 INFO org.apache.zeppelin.rest.AbstractTestRestApi:181 - Test
Zeppelin stared.
SPARK HOME detected null
02:22:06,302 INFO org.apache.zeppelin.rest.AbstractTestRestApi:298 -
Terminating test Zeppelin...
```
which fails all rest api tests. obviously this is not related to this PR,
although not sure why spark untar keeps failing in same profile. logs are
[here](https://api.travis-ci.org/jobs/181537712/log.txt?deansi=true).
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