Apache NiFi 1.5启动失败：权限错误及JDK 9.0.4兼容性咨询

Hey there! I’ve dealt with similar compatibility headaches before, so let’s get straight to the point:

明确结论 #

Apache NiFi 1.5 完全不兼容 JDK 9.0.4 — this is almost certainly the root cause of the issues you’re facing.

背后的原因 #

• NiFi 1.5 launched back in January 2018, right around when JDK 9 was still new. The NiFi team focused their testing and development entirely on JDK 8 (both Oracle JDK 8 and OpenJDK 8) at that time, with zero support for JDK 9’s new features.
• JDK 9 introduced the modular system (Project Jigsaw), which broke a lot of traditional Java classloading logic that NiFi’s early versions relied on. There was no code adjustment in NiFi 1.5 to handle this change.

关于官方兼容性文档 #

You’re right that it’s not always easy to find upfront, but the official NiFi release notes for each version explicitly list supported Java versions:

• For the NiFi 1.x series, only JDK 8 is officially supported until NiFi 1.10+, which started adding limited support for JDK 11 (full stable support came later in higher releases).
• Check the RELEASE_NOTES file included with your NiFi 1.5 installation package (or in the corresponding branch of the official source repo) — it’ll spell out the supported Java versions clearly.

快速解决建议 #

• The most reliable fix is to downgrade your JDK to version 8 (like Oracle JDK 8u301 or OpenJDK 8). Update your JAVA_HOME environment variable to point to this JDK’s installation directory, then restart NiFi.
• If you need to stick with a newer JDK, consider upgrading NiFi to 1.10 or later. Just be sure to back up your configs first and check for any component compatibility gaps during the upgrade.

内容的提问来源于stack exchange，提问作者Code Novice