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NiFi automated builds run on the latest updated versions of the following Java Long Term Support releases:

  • Java 8
  • Java 11
  • Java 17
  • 21

Minimum Required Versions

For each supported version of Java, NiFi requires the follow minimum update version:

  • Java 8 Update 251
  • Java 11.0.7
  • Java 17.0.1
  • 21

NiFi automated builds run on the latest updated version of Apache Maven and require the following minimum version, which can be executed using the Maven Wrapper scripts included in the repository:

  • Apache Maven 3.69.02

Running NiFi in Debug mode

...

    1. $ git cherry-pick <commit id>
  2. (Optional) Push to the Apache repository (support branch)
    1. $ git push apache 0support/nifi-1.x.y

Anchor
fetch-config
fetch-config
Fetch Config

...

[remote "github"]
url = git@github.com:apache/nifi.git
fetch = +refs/heads/*:refs/remotes/github/*
fetch = +refs/pull/*/head:refs/remotes/github/pr/*

Code Style

This is a developing standard and will be updated to reflect an agreed upon format further supported by the maven-checkstyle-plugin.  Our current checkstyle rules can be found here.

TODO: Provide code formatters for the common IDEs

IntelliJ IDEA Users

nifi-checkstyle.xml is a Checkstyle configuration file created by extracting checkstyleRules from nifi/pom.xml. 

Steps for IntelliJ users:

The maven-checkstyle-plugin enforces minimum code style requirements.

The checkstyle.xml configuration in the project root directory contains the current set of style rules.

IntelliJ IDEA Users

  1.  Download Checkstyle-IDEA plugin
  2. Install plugin by loading the downloaded zip from: Preferences -> Plugins -> Install plugin from disk...
  3. After restarting IntelliJ, configure Checkstyle plugin to use NiFi Checkstyle configuration file from: Preferences -> Other Settings -> Checkstyle
  4. Add nifi-checkstyle.xml in in Configuration File and activate it

...

  1. activate the configuration

Eclipse Users

Code formatter rules that adhere to our checkstyle rules can be found here.

Consider using the The Eclipse Checkstyle Plugin can be configured with our the project checkstyle rules to see what portions of your code are conflicting with our coding standard.
Consider installing these templates that help generate common Apache NiFi code snippets.  TODO: provide link.xml to evaluate conformance with project coding standards.

Contact us!

The developer mailing list (dev@nifi.apache.org) is monitored pretty closely, and we tend to respond quickly.  If you have a question, don't hesitate to shoot us an e-mail - we're here to help! Unfortunately, though, e-mails can get lost in the shuffle, so if you do send an e-mail and don't get a response within a day or two, it's our fault - don't worry about bothering us. Just ping the mailing list again.