[ZEPPELIN-1941] Zeppelin CronJob with release option result in deadlock

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.6.0, 0.6.1, 0.6.2
• Fix Version/s: 0.7.0
• Component/s: Interpreters
• Assignee: OopsOutOfMemory
• Reporter: OopsOutOfMemory
• Created: 12/Jan/17 00:22
• Updated: 16/Jan/17 17:25
• Resolved: 16/Jan/17 17:24

Description

There is a deadlock in concurrent cron job execution with release resource option.

Scenario:
Two notebook run with cron job that release resource after job finished.

In Notebook.CronJob.execute() method:
T1. note.runAll(); // locked paragraphs(lock) and wait to interpreterSettings(lock)

T2. notebook.getInterpreterFactory().restart() //locked(interpreterSettings) and wait for paragraphs(lock) during jobAbort.

This will trigger a deadlock that cause zeppelin hang.

Detail stack trace please refer `deadlock_cronjob.jstack`

Issue Links

• links to: GitHub Pull Request #1888
• links to: GitHub Pull Request #1891