Fail to 'save web map' in arcgis pro to update existing map in Portal; 'Problems getting data connection for: CIMPATH=.....json

[imansbburg]

I'm trying to update a secure web map that i own on our Portal with more finessed symbology from ArcGIS Pro, but every time it fails. From the logs, the only error line item i see is this:

StatusMessage: Problems getting data connection for: CIMPATH=[long item id string].json

Any ideas?

[NicolasGIS]

Same issue on ArcGIS Pro 3.4.1.

Did you find out what was the issue ?

Thanks

[imansbburg]

I never got any answers...but it does seem to only be an issue if it's map image services in the map rather than feature services. If I only have feature services in the map, it works fine. 

[NicolasGIS]

Thanks @imansbburg for your reply.

I believe I found the root cause of the issue: it is related to the size of the webmap. Basically, when you are referencing Map Image Services, even if you don't modify them, it copies the symbologie of each layer and with CIMSymbols for example, size of the webmap can quickly grows. It seems like when using FeatureServices, it does not behave the same way.

It looks like a limitation from ArcGIS Pro which tries to `addItem` or `updateItem`  using  x-www-form-urlencoded. I discussed it on this other thread:

https://community.esri.com/t5/arcgis-enterprise-portal-questions/portal-for-arcgis-11-3-cannot-creat...

Basically, after having increased Portal for ArcGIS maxHttpPostSizeInBytes property, I was able to update my webmap and no longer had any issue.