question Re: Custom Processor extending from PutSFTP results in NoClassDefFoundError in Support Questions

Custom Processor extending from PutSFTP results in NoClassDefFoundError

LSchneider — Thu, 24 Apr 2025 11:00:48 GMT

Hello everyone,

I try to create a custom PutSFTP processor to add different failure Relationships to further improve my error handling and go different routes if an error occurs.

Im using NiFi-2.3.0 and a Java 21 shaded JAR for my custom processors

my issue is that i get java.lang.NoClassDefFoundError: org/apache/nifi/processors/standard/PutSFTP message when loading my custom processor in Nifi.

I already tried:

adding the standard processors to my shaded jar but that only made things worse and some standard processors stopped working
adding nifi-file-transfer dependency to shaded jar but then the default PutSFTP stopped working
use extends PutFileTransfer<SFTPTransfer> instead of PutSFTP but again NoClassDefFound only this time for PutFileTransfer

Is there a way to add the missing Class without breaking anything else?

I really want to avoid rebuilding the whole PutSFTP to a custom PutSFTP when i only need to change small parts of it.

Re: Custom Processor extending from PutSFTP results in NoClassDefFoundError

VidyaSargur — Thu, 24 Apr 2025 14:20:08 GMT

@LSchneider, Welcome to our community! To help you get the best possible answer, I have tagged in our NiFi experts @MattWho @Shelton, and @SAMSAL, who may be able to assist you further.

Please feel free to provide any additional information or details about your query, and we hope that you will find a satisfactory solution to your question.

Re: Custom Processor extending from PutSFTP results in NoClassDefFoundError

LSchneider — Mon, 05 May 2025 08:58:39 GMT

Hello everyone,

Unfortunatly im still looking for a solution to this issue. I would appreciate any information that might solve this issue

Thank you in advance for your support.

Best regards