GitHub user zjffdu opened a pull request: https://github.com/apache/zeppelin/pull/2878
ZEPPELIN-3331. Use NullLifecycleManager by default ### What is this PR for? Just keep the behavior consistent with previous version. So use NullLifecycleManager by default, user need to configure zeppelin-site.xml to enable TimeoutLifecycleManager ### What type of PR is it? [ Improvement ] ### Todos * [ ] - Task ### What is the Jira issue? * https://issues.apache.org/jira/browse/ZEPPELIN-3331 ### How should this be tested? * CI pass ### Screenshots (if appropriate) ### Questions: * Does the licenses files need update? No * Is there breaking changes for older versions? No * Does this needs documentation? No You can merge this pull request into a Git repository by running: $ git pull https://github.com/zjffdu/zeppelin ZEPPELIN-3331 Alternatively you can review and apply these changes as the patch at: https://github.com/apache/zeppelin/pull/2878.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 #2878 ---- commit 5649d83046ff129095a3c75f0e76e38d3ab464cc Author: Jeff Zhang <zjffdu@...> Date: 2018-03-14T13:09:54Z ZEPPELIN-3331. Use NullLifecycleManager by default ---- ---