[NIFI-241] Framework FingerprintFactory begins processor life cycle but does not finish

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.0.1
• Component/s: Core Framework
• Assignee: Mark Payne
• Reporter: Michael W Moser
• Created: 09/Jan/15 18:06
• Updated: 13/Jan/15 18:37
• Resolved: 13/Jan/15 18:36

Description

The FingerprintFactory will create Processor objects and invoke their initialize() and @OnAdded methods. If a Processor uses system resources, these methods are where those resources are allocated. But, those processors are never disposed by calling their @OnRemoved or @OnShutdown methods. This may result in system resource leaks, depending on how processors are implemented.

To reproduce, add a processor to the NiFi graph and restart NiFi. Note that initialize() and @OnAdded is called at least twice (I observed 3 times) as NiFi starts. The getIdentifier() is different for each invocation. Shutdown NiFi and observe that @OnShutdown is called once.