Github user 1ambda commented on the issue:
https://github.com/apache/zeppelin/pull/1339
Short summary and small thought about #1399
1. Using symlink like `local-spark/master` would be safe i think. It
enables user replace his local spark without renaming directories. Currently we
are using hard coded name.
```
SPARK_CACHE="local-spark"
SPARK_ARCHIVE="spark-${SPARK_VERSION}-bin-hadoop${HADOOP_VERSION}"
```
2. about UX,
- most (experienced in zeppelin) users do not use local spark
- for new comers, we can provide embedded spark using docker will be
shipped by #1538
- and storking `get-spark` is not too hard even if new users do not use the
docker images.
3. Now users need to type `get-spark`. it works as described
```
$ zeppelin-review git:(pr/1339) ./bin/zeppelin-daemon.sh start
Log dir doesn't exist, create
/Users/1ambda/github/apache-zeppelin/zeppelin-review/logs
Pid dir doesn't exist, create
/Users/1ambda/github/apache-zeppelin/zeppelin-review/run
You do not have neither local-spark, nor external SPARK_HOME set up.
If you want to use Spark interpreter, you need to run get-spark at least
one time or set SPARK_HOME.
Zeppelin start [ OK ]
$ zeppelin-review git:(pr/1339) ./bin/zeppelin-daemon.sh stop
Zeppelin stop [ OK ]
$ zeppelin-review git:(pr/1339) ./bin/zeppelin-daemon.sh get-spark
Download spark-2.0.1-bin-hadoop2.7.tgz from mirror ...
% Total % Received % Xferd Average Speed Time Time Time
Current
Dload Upload Total Spent Left
Speed
100 178M 100 178M 0 0 7157k 0 0:00:25 0:00:25 --:--:--
6953k
spark-2.0.1-bin-hadoop2.7 is successfully downloaded and saved under
/Users/lambda/github/apache-zeppelin/zeppelin-review/local-spark
$ zeppelin-review git:(pr/1339) ./bin/zeppelin-daemon.sh start
Zeppelin start [ OK ]
```
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