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https://issues.apache.org/jira/browse/NIFI-7063?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17022166#comment-17022166
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Otto Fowler commented on NIFI-7063:
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This is a way to address this issue without regressions
> version of createListValidator that ensures validator called
> ------------------------------------------------------------
>
> Key: NIFI-7063
> URL: https://issues.apache.org/jira/browse/NIFI-7063
> Project: Apache NiFi
> Issue Type: Improvement
> Reporter: Otto Fowler
> Assignee: Otto Fowler
> Priority: Major
>
> as seen in NIFI-7055, it is not consistent when the passed validator to
> createListValidator is called.
> As changing the behavior will introduce regressions, a new
> createListValidator like function should be created that uses
> split(string,-1) such that there are always empty elements returned, and that
> exclude empty and the validator are always considered.
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