Hi all, I'm encountering a JAR version dependency issue when developing a custom Processor that uses the GCPCredentialsService in Nifi 1.5.0.
1) The nifi-gcp-bundle distributed with Nifi 1.5.0 (which contains GCPCredentialsService) is packaged with dependencies on: - com.google.cloud:google-cloud:0.8.0 - com.google.auth:google-auth-library-oauth2-http:0.6.0 Which both transitively depend on com.google.guava:guava:19.0, except the root-level pom.xml for Nifi (here <https://github.com/apache/nifi/blob/master/pom.xml>) explicitly pins the guava version to 18.0. 2) The custom Processor I am building also depends on com.google.cloud:google-cloud:0.8.0, but actually uses methods from this library that depend on features added in com.google.guava:guava:19.0. 3) In order to make the GCPCredentialsService available inside my Processor NAR, I have added the nifi-gcp-services-api-nar as a parent. 4) The implementation of NarClassLoader always starts the search for classes in the parent, which means that when my processor looks for com.google.guava class definitions, the com.google.guava:guava:18.0 JAR packaged with the nifi-gcp-services-api-nar is always found first, resulting in a java.lang.NoSuchMethodError exception in my Processor's execution. I'm not sure what the best solution is – I guess I could create my own version of the nifi-gcp-bundle that has the correct pom.xml file to force the use of guava:19.0, but that seems a bit overkill for a change that is essentially 5 lines of XML in a POM file. Any suggestions or thoughts? Thanks! Douglas -- Douglas Willcocks VP France, Data Science & Engineering 19 Rue Richer, 75009 Paris, France M: +33 6 80 37 60 72 E: douglas.willco...@artefact.com W: http://www.artefact.com/ -- This email and any attachments contains privileged and confidential information intended only for the use of the addressee(s). If you are not an intended recipient of this email, you are hereby notified that any dissemination, copying or use of information is strictly prohibited. If you received this email in error or without authorization, please delete the email from your system and notify us immediately by sending us an email. If you need any further assistance, please send a message to he...@artefact.com .
