I have put detailed solution description here   You should be able to start NiFi & its registry with this docker compose file. It persists several folders on the local disk & rest will be persisted in the docker volume called 'nifi_data' so that it retains the previous state of other folders like content_repository, database_repository, flowfile_repository, provenance_repository, state  and work. ... View more

Anthony Can you elaborate what you meant by your third point and what steps you took i.e SSL endpoint having a full chain of trust? BTW, I could never get it resolved in my corporate network , however it does work in my personal network without using SSLContextService where I don't have the corporate firewall coming in between so I presumed this may have something to do with the way my company's firewall regulates HTTPS traffic. Thanks! PS: the error I am getting (NullPointerException somewhere at KeyStore.getInstance ) seems to indicate Nifi doesn't like that I'm not populating anything in the keystore/keystore password fields. But from what I understand, Dropbox doesn't require key authentication, so not sure why Nifi is expecting something to be there. ... View more

Same problem / result on Windows & 1.6.0 , Same problem : 1.6 on Windows. ... View more

Thanks for your help Matt. Due to restricted access to the site we ended up solving with a python script that monitors the Processor state via the Nifi API. Apologies I couldn't see this through to the end. ... View more