Hi Mark, After reading the JIRA [1] and the PR for the UpdateAttribute modifications, I believe this was simply an unintended consequence of the code changes. If you would like to write a new JIRA, then I'm sure we can restore the "Set Empty String" functionality when not storing attributes in local state.
[1] - https://issues.apache.org/jira/browse/NIFI-1582 -- Mike On Thu, Jan 18, 2018 at 5:11 PM, Mark Bean <mark.o.b...@gmail.com> wrote: > UpdateAttribute supports stateful properties. In doing so, the validator > applied to the attributes changes. In the case where stateful properties > are not desired, the validator adds StandardValidators.NON_EMPTY_ > VALIDATOR. > This means the "Set Empty String" checkbox cannot be used. > > One solution is to store state locally, and then set both the Stateful > Variables Initial Value and the dynamic property to the Empty String. > > However, my question: why is the NON_EMPTY_VALIDATOR added (when stateful > is not set) versus just the ATTRIBUTE_KEY_PROPERTY_NAME_VALIDATOR? > > Thanks, > Mark >
