https://community.cloudera.com/t5/Support-Questions/Setting-Stateful-Variables-Initial-Value-in-UpdateAttributes/m-p/208803#M170760 <P>I Ran into this issue today... After 1 hour deleted the processor and started over and then it was working fine... No idea what happened. FYI for link to guide look here: <A rel="noopener noreferrer noopener noreferrer" href="https://nifi.apache.org/docs/nifi-docs/components/org.apache.nifi/nifi-update-attribute-nar/1.9.2/org.apache.nifi.processors.attributes.UpdateAttribute/additionalDetails.html" target="_blank">https://nifi.apache.org/docs/nifi-docs/components/org.apache.nifi/nifi-update-attribute-nar/1.9.2/org.apache.nifi.processors.attributes.UpdateAttribute/additionalDetails.html</A></P> Fri, 19 Apr 2019 08:56:20 GMT rlhull6 2019-04-19T08:56:20Z