Github user hyonzin commented on the issue:
https://github.com/apache/zeppelin/pull/1518
Test in SCALA_VER="2.10" SPARK_VER="1.5.2" still fails. I checked its
[LOG](https://s3.amazonaws.com/archive.travis-ci.org/jobs/168614710/log.txt),
```bash
13:50:41,164 INFO org.apache.zeppelin.rest.AbstractTestRestApi:299 - 200 -
OK
13:50:41,164 INFO org.apache.zeppelin.rest.AbstractTestRestApi:140 - Test
Zeppelin stared.
SPARK HOME detected null
```
```bash
+cp spark-1.5.2-bin-hadoop2.3.tgz ..
+cd ..
+tar zxf spark-1.5.2-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-1.5.2-bin-hadoop2.3.tgz'
Unable to extract spark-1.5.2-bin-hadoop2.3.tgz
+rm -rf spark-1.5.2-bin-hadoop2.3
+rm -f spark-1.5.2-bin-hadoop2.3.tgz
+set +xe
```
It seems to be disabled to extract .tgz file, so it can't find Spark Home.
And I wonder why it's associated with my modification yet.
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