@mark berman Yep, the link that @Andrew Lim links to would have been the one to use. Just as an update - that tutorial was revamped so that when using newer HDF sandboxes, necessary components are baked in and no external downloads/uploads should be necessary. So for people that stumbled upon this issue: The tutorial is updated in a way that everything you need comes pre-set up with your downloaded Hortonworks HDF Sandbox. ... View more

It's Java, if you aren't expecting nulls. Expect crashes. First Rule of Java, Handle Nulls. Second Rule of Java, Handle Exceptions because you forgot 1st rule. ... View more

Does any one know why or under what circumstances NIFI passes a null flowfile to a custom NIFI processor ? We are seeing cases where the session that is passed in as an input to the onTrigger method of the custom (java) processor contains a session with a null flow file. ... View more