Are there any updates to the issues mentioned in these threads?
I have been working with support on “Esri Case #02212878 - Open Data site download errors”. The error “Status: An error occurred. Download failed.” is returned on some data, but not on the same ones each time. The layers are from on premise ArcGIS 10.5.1 Server map services shared in ArcGIS Online. It seems like doing a manual reset allows the data to be downloaded again. However, this is not a solution. First, to know there are errors a user would have to contact me. Otherwise, I need to try to download each dataset; should I check daily, weekly? Then the manual reset takes several hours if not overnight to complete. At this point, it is more work for me to have an open data site than to have those who need data contact me directly. Plus, having an unreliable user experience is not a good look for our GIS division.
I've reviewed the case and it looks like the parcel and building datasets have been returning download errors. Sometimes larger services can be tricky to configure, particularly when hosted on premises. I just checked on my end and they both seem to be downloading quickly.
You mentioned that doing a manual reset resolves the issue -- have you had to do this more than once? If so, then we have more work to do to resolve the issue.
Apologies for the lag in response. I checked the city boundary layer and it looks to be returning a 500 error for all queries. I'm getting a 500 error when trying to return all records: https://gis.worcesterma.gov/worcags/rest/services/OpenData/Boundary/MapServer/0/query?where=1%3D1&te...
This leads me to believe that the issue is with the server. If so, we will need to kick this back to support.
Here's an update. It appears to be a memory issue on the server combined with services set as low isolation. Memory utilization is high (~80-85%) so it is possible the services are crashing and not spinning up again. I've tested switching 2 to high isolation, which seems to prevent the problem. Now I am waiting on more memory to change the remaining services to high isolation.