[ZEPPELIN-4600] Socket connection between zeppelin server and interpreter is not closed properly for branch 0.8

### What is this PR for?
Fix the stability problem of zengin for long time (7day) loop working ,
release the thread pools and socket connection when the interprether is closed
the same bug was found in the version 0.81 and 0.82

### What type of PR is it?
[Bug Fix]

### Todos
* [ ] - Task

### What is the Jira issue?
https://issues.apache.org/jira/browse/ZEPPELIN-4600

### How should this be tested?
* Single tast works 30 hours with 7 second delay, test passed.

### Screenshots (if appropriate)

### Questions:
* Does the licenses files need update?No
* Is there breaking changes for older versions?No
* Does this needs documentation?No

Author: tylerba-f <tylerf@126.com>

Closes #3650 from tylerba-f/branch-0.8 and squashes the following commits:

467f3a377 [tylerba-f] [ZEPPELIN-4600] code style adjust
34add36bf [tylerba-f] [ZEPPELIN-4600]
306272a9a [tylerba-f] [ZEPPELIN-4600] nullpoint error in the long time process use api to run a note
4 files changed
tree: f7244a3e3743d3925e2902e7760f4808ca688c97
  1. .github/
  2. _tools/
  3. alluxio/
  4. angular/
  5. beam/
  6. bigquery/
  7. bin/
  8. cassandra/
  9. conf/
  10. dev/
  11. docs/
  12. elasticsearch/
  13. file/
  14. flink/
  15. geode/
  16. groovy/
  17. hbase/
  18. helium-dev/
  19. ignite/
  20. interpreter/
  21. interpreter-parent/
  22. jdbc/
  23. kylin/
  24. lens/
  25. licenses/
  26. livy/
  27. markdown/
  28. neo4j/
  29. notebook/
  30. pig/
  31. python/
  32. r/
  33. sap/
  34. scalding/
  35. scio/
  36. scripts/
  37. shell/
  38. spark/
  39. testing/
  40. zeppelin-display/
  41. zeppelin-distribution/
  42. zeppelin-examples/
  43. zeppelin-integration/
  44. zeppelin-interpreter/
  45. zeppelin-interpreter-integration/
  46. zeppelin-jupyter/
  47. zeppelin-server/
  48. zeppelin-web/
  49. zeppelin-zengine/
  50. .appveyor.yml
  51. .gitignore
  52. .travis.yml
  53. LICENSE
  54. NOTICE
  55. pom.xml
  56. README.md
  57. Roadmap.md
  58. SECURITY-README.md
  59. STYLE.md
  60. travis_check.py
README.md

Apache Zeppelin

Documentation: User Guide
Mailing Lists: User and Dev mailing list
Continuous Integration: Build Status
Contributing: Contribution Guide
Issue Tracker: Jira
License: Apache 2.0

Zeppelin, a web-based notebook that enables interactive data analytics. You can make beautiful data-driven, interactive and collaborative documents with SQL, Scala and more.

Core feature:

  • Web based notebook style editor.
  • Built-in Apache Spark support

To know more about Zeppelin, visit our web site http://zeppelin.apache.org

Getting Started

Install binary package

Please go to install to install Apache Zeppelin from binary package.

Build from source

Please check Build from source to build Zeppelin from source.