Nifi error: Unable to save flow controller configuration

[#1]

I'm getting same error again and again. Not able to resolve it. Can anyone help me in it. Nifi running in Linux server

[#2]

@araujo 

Here it is:

[#3 · Accepted solution]

Hi , @krishna123,

Thanks for the output! This explains the issue that you're seeing.

You mentioned before that you were using Java 1.8.0_275, but the log line you just provided shows that NiFi is actually using Java 1.8.0_74.

In this version of Java, cryptographic key sizes are limited and NiFi cannot not handle AES keys larger than 128 bits. Because of that, NiFi fails to instantiate AES iphers properly. To enable that in your Java version, you would have to download the Java Cryptography Extension (JCE) Unlimited Strength policies and copy them to your Java home manually to allow AES keys of size 256 and larger. These policies are only included by default in the JDK starting from update 1.8.0_162.

If you already have Java 1.8.0_275 installed, make sure NiFi can see it and use it. This will solve your problem. You can verify which Java version NiFi is using by checking the line that I mentioned in the log.

Cheers,

André

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[#4]

@araujo  How can I change the version of Java which Nifi is using?

[#5]

@krishna123 ,

Check your environment path and Java Home settings. NiFi will pick the first Java binary that it finds in your path.

André

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[#6]

ok Thanks @araujo 

[#7]

@krishna123 ,

Did you manage to get your problem solved?

André

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[#8]

@araujo No, could not fix the issue

[#9]

@krishna123 ,

Are you able to uninstall the  Java 1.8.0_74 version?

André

[#10]

Hi @krishna123, 

I have the same problem. Thank you for helping me