Github user MikeThomsen commented on a diff in the pull request:
https://github.com/apache/nifi/pull/2663#discussion_r191607896
--- Diff:
nifi-nar-bundles/nifi-site-to-site-reporting-bundle/nifi-site-to-site-reporting-task/src/main/resources/docs/org.apache.nifi.reporting.SiteToSiteStatusReportingTask/additionalDetails.html
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@@ -50,7 +50,7 @@ <h2>Record writer</h2>
{ "name" : "actorHostname", "type" : "string"},
{ "name" : "componentType", "type" : "string"},
{ "name" : "componentName", "type" : "string"},
- { "name" : "parentId", "type" : "string"},
+ { "name" : "parentId", "type" : ["string", "null"]},
--- End diff --
If you mean [this bug](https://issues.apache.org/jira/browse/AVRO-1118)
looks like it was fixed a long time ago.
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