Thank you for your suggestion. However, this will not work because ExecuteProcessor does not accept an incoming relationship. I have a preceding processor that has an initialize relationship as an output. Upon initialization of my dataflow a flowfile is is sent to this relationship and contains the necessary information to create the Solr Collection. The more I look at this issue the more appropriate a CreateSolrCollection processor sounds. For now I'm going to continue with my scripted processor to run the solrctl command. This just requires the nifi user to have authority to invoke the necessary api calls. Unless there's something I'm missing, I think that's the best solution for my question.
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