question Re: Does Apache NiFi 1.19.1 or 1.20.0 Have Kotlin in the Software Stack? in Support Questions

Does Apache NiFi 1.19.1 or 1.20.0 Have Kotlin in the Software Stack?

davehkd — Mon, 27 Mar 2023 09:57:43 GMT

Does Apache NiFi 1.19.1 or 1.20.0 Have Kotlin in the Software Stack? And, how can I confirm this?

Thank you

Re: Does Apache NiFi 1.19.1 or 1.20.0 Have Kotlin in the Software Stack?

cotopaul — Mon, 27 Mar 2023 11:17:09 GMT

As far as I know, there is no Kotlin in the software stack ... but you should wait for an answer from somebody with more experience.

Nevertheless, in the meantime, you can have a look for yourself, as the code is public: https://github.com/apache/nifi

Re: Does Apache NiFi 1.19.1 or 1.20.0 Have Kotlin in the Software Stack?

MattWho — Mon, 27 Mar 2023 16:35:28 GMT

@davehkd
Kotlin is a transitive dependency of OkHttp, so any NiFi component that has a dependency on OkHttp will also include the Kotlin stdlib jars as well.

The Kotlin version was upgraded to 1.7.20 in Apache NiFi 1.19.0.
https://issues.apache.org/jira/browse/NIFI-10655

This update impacts the following Kotlin jar:

kotlin-stdlib-common-1.7.20.jar kotlin-stdlib-jdk8-1.7.20.jar kotlin-stdlib-jdk7-1.7.20.jar kotlin-stdlib-1.7.20.jar

When NiFi is launched it unpacks are the NiFi nars into the NiFi work directory:
<work path defined in nifi.properties file>/work/nar/extensions/

You can search those unpacked nar's "bundled-dependencies" for the kotlin jars to see all the nars containing components that utilize OkHttp and thus also have the kotlin transitive dependency.

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Thank you,

Matt

Re: Does Apache NiFi 1.19.1 or 1.20.0 Have Kotlin in the Software Stack?

davehkd — Wed, 29 Mar 2023 12:41:22 GMT

Thanks so much Matt! Is this answer that you provided also correct in regards to version 1.20?

Thank you again!

Re: Does Apache NiFi 1.19.1 or 1.20.0 Have Kotlin in the Software Stack?

MattWho — Thu, 30 Mar 2023 12:52:58 GMT

@davehkd

Changes committed to an early version 1.19 will persist into the next version unless a specific closed jiras exists that makes another changes impacting version. I saw no other newer jiras related to Kotlin version changes at time of this response.

Matt