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https://issues.apache.org/jira/browse/NIFI-241?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14274099#comment-14274099
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Mark Payne commented on NIFI-241:
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Mike,
I'm looking into this. I agree that the framework does call initialize() and
the @OnAdded methods. The @OnAdded methods should not be called, as the
Processor is not being added to the canvas at that point. However, I am not
sure that I agree that the initialize() method should not be called.
I'm curious as to what kind of resources you are allocating here - typically
the resource allocation should happen in methods using @OnScheduled. Can you
explain the use case a bit?
Thanks
-Mark
> Framework FingerprintFactory begins processor life cycle but does not finish
> ----------------------------------------------------------------------------
>
> Key: NIFI-241
> URL: https://issues.apache.org/jira/browse/NIFI-241
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Reporter: Michael Moser
> Assignee: Mark Payne
> Fix For: 0.0.1
>
>
> 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.
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