Bug
When using Map Viewer with HTTP/2 enabled on Internet Information Services (IIS) in a Chrome or Edge browser, a burst of concurrent requests, such as rapid panning and zooming of the map, can cause features to disappear and return the "ERR_CONNECTION_RESET" error message in the developer tools’ console tab.
| Bug ID Number | BUG-000168562 |
|---|---|
| Submitted | June 24, 2024 |
| Last Modified | December 31, 2025 |
| Applies to | Portal for ArcGIS |
| Version found | 11.4 |
| Operating System | Windows Server |
| Operating System Version | 2022 |
| Version Fixed | 11.5 |
| Status | Fixed |
Additional Information
This issue is addressed in ArcGIS Enterprise 11.3 with the Portal for ArcGIS 11.3 Map Viewer HTTP/2 Patch. Please refer to https://support.esri.com/en-us/patches-updates/2025/portal-for-arcgis-11-3-map-viewer-http-2-patch for more information. A related defect, BUG-000177402, is resolved with the ArcGIS Web Adaptor (IIS) Stability Patch. Please refer to https://support.esri.com/en-us/patches-updates/2025/arcgis-web-adaptor-iis-stability-patch for more information.Workaround
- Use a feature service URL referencing the port 6443 instead of the web adaptor.
- Disable HTTP/2 on the Internet Information Services (IIS) website hosting the ArcGIS GIS Server web adaptor.
- Use Firefox as the browser, or disable HTTP/2 on Chrome or Edge, but this requires everyone in the organization to be using the same browser or settings.
Steps to Reproduce
Bug ID: BUG-000168562
Software:
- Portal for ArcGIS
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