ottobackwards commented on a change in pull request #4656:
URL: https://github.com/apache/nifi/pull/4656#discussion_r526061624



##########
File path: 
nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-api/src/main/java/org/apache/nifi/web/api/ParameterContextResource.java
##########
@@ -400,11 +400,14 @@ public Response submitParameterContextUpdate(
     }
 
     private void validateParameterNames(final ParameterContextDTO 
parameterContextDto) {
-        for (final ParameterEntity entity : 
parameterContextDto.getParameters()) {
-            final String parameterName = entity.getParameter().getName();
-            if (!isLegalParameterName(parameterName)) {
-                throw new IllegalArgumentException("Request contains an 
illegal Parameter Name (" + parameterName + "). Parameter names may only 
include letters, numbers, spaces, and the special " +
-                    "characters .-_");
+        if (parameterContextDto.getParameters() != null) {

Review comment:
       Is there a way that needs to be expressed in the OpenAPI or the 
annotations?




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