Tested jpg file from 2 sources my google drive and flickr. I get much more metadata using my flickr file get good metadata that you can use further down your data flow. I do not believe that this works on pdf as I tested running a pdf through and did not extract any metadata Sample metadata: Key: 'Exif IFD0.Date/Time'Value: '2015:11:06 19:06:53' Key: 'Exif IFD0.Make'Value: 'samsung' Key: 'Exif IFD0.Model'Value: 'SM-N910T' ... View more

I am coming in a bit late but want to also recommend randomuser.me Also want to point out that there are plenty of nifi templates found here: https://cwiki.apache.org/confluence/display/NIFI/Example+Dataflow+Templates Look at the "Fun_with_Hbase" template which gets random data from a rest API and in your case use the PutHDFS processor to ingest in to HDFS. ... View more