NIFI-13184 - on ProcessGroup.start(), mark invalid processors to start once they become valid

[greyp9]

Tracking

Please complete the following tracking steps prior to pull request creation.

Issue Tracking

• Apache NiFi Jira issue created

Pull Request Tracking

• Pull Request title starts with Apache NiFi Jira issue number, such as NIFI-00000
• Pull Request commit message starts with Apache NiFi Jira issue number, as such NIFI-00000

Pull Request Formatting

• Pull Request based on current revision of the main branch
• Pull Request refers to a feature branch with one commit containing changes

Verification

Please indicate the verification steps performed prior to pull request creation.

Build

• Build completed using mvn clean install -P contrib-check
  • JDK 21

UI Contributions

• NiFi is modernizing its UI. Any contributions that update the current UI also need to be implemented in the new UI.

Licensing

• New dependencies are compatible with the Apache License 2.0 according to the License Policy
• New dependencies are documented in applicable LICENSE and NOTICE files

Documentation

• Documentation formatting appears as expected in rendered files

[joewitt]

@greyp9 Can you clarify the behavior you're seeing. I have a system i can try to reproduce this on but I have some python components that take some time to load and they show up invalid. But they did start on their own I thought.

Are you saying right now such components even if set to auto start would on restart not launch?

[greyp9]

app1.log

This is a log excerpt (grep processor ID) that illustrates the updated behavior.

[greyp9]

I've not tested the case where the processors are set to auto-start.

In the case where a flow is imported, during the period of time where the dependencies are being resolved, the action "ProcessGroup / Start" excludes the processors with dependencies. So they end up Stopped, even after the dependencies become available.

[greyp9]

I suspect that, if set to auto-start in the flow definition, things would work as expected.