Portal for ArcGIS swaps fields of aggregation result layers.

Workaround

• Republish the service without the two fields or, if not applicable.
• Modify the .msd file the polygon feature service is based on, which is located in arcgisinput/xxx.mapServer/extracted/p20/xxxx.msd.
  • Open the file using a zip tool (e. g. 7zip).
  • Navigate to the map directory.
  • Choose the desired XML, open externally and modify the visible tag for the two fields (area and length), for example:

<CIMFieldDescription xsi:type='typens:CIMFieldDescription'>

<Alias>GEM_NAME</Alias>

<FieldName>gem_name</FieldName>

<Highlight>false</Highlight>

<ReadOnly>false</ReadOnly>

<Visible>true</Visible>

<ValueAsRatio>false</ValueAsRatio>

<Searchable>false</Searchable>

<SearchMode>Exact</SearchMode>

</CIMFieldDescription>

• Replace the current XML in the .msd file with the modified one.
• Restart the service.

Steps to Reproduce