GitHub user gss2002 opened a pull request:
https://github.com/apache/zeppelin/pull/1503
NPE LivySparkSQLInterpreter thrown with %livy.sql interpreter function
### What is this PR for?
The LivySparkSQLInterpreter class does not correctly process the
userSessionMap throwing back an NPE when using %livy.sql or %sql when livy is
default binding. This prevents correct sharing between Spark Sessions and
SparkSQL Sessions. I have attached a fix that implements seperate static single
instance classes that manage userSessionMaps.
### What type of PR is it?
Bug Fix/Improvement
### Todos
Documentation/Unit Tests
### What is the Jira issue?
https://issues.apache.org/jira/browse/ZEPPELIN-1516
### How should this be tested?
Run %sql or %livy.sql against a sql enabled dataset such as hive metastore.
### Questions:
* Does the licenses files need update? n
* Is there breaking changes for older versions? n
* Does this needs documentation? m
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/gss2002/zeppelin ZEPPELIN-1516
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/zeppelin/pull/1503.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1503
----
commit 11bcd2d1db02ff2dbb2a8e560e3f09fe37057796
Author: gss2002 <[email protected]>
Date: 2016-10-11T04:09:23Z
ZEPPELIN-1516 Static/Singleton for userSessionMaps
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