ArcGIS Server + Web Adaptor possible problem

[HellisPelizzari2]

Hi all,

I have an issue with ArcGIS Server and Utility Network.

I have a server where ArcGIS Server and Web Adaptor v11.3 + all patches are installed.
When I navigate the service via the Web Adaptor, some requests seem to randomly fail. The map updates partially, and many errors appear in the console.

In Chrome:
Failed to load resource: net::ERR_CONNECTION_RESET

In Firefox:
There are no errors in the console, but some requests show NS_BINDING_ABORTED, and others have 0 bytes transferred.

However, if I access the services using the internal port 6443, this issue does not occur.

Could it be that the Web Adaptor sometimes drops connections or encounters errors if the machine is under heavy load?

[ChrisUnderwood · Accepted solution]

Hello @HellisPelizzari2 , the error message and symptoms you have described seem to match the defect reference BUG-000168562.

https://support.esri.com/en-us/bug/arcgis-web-adaptor-may-stop-responding-to-requests-when-bug-00016...

[RyanUthoff]

Are there any status updates for this bug? We are looking to upgrade from 11.2 to 11.3, but are hesitant because we don't want to encounter this bug as it would have a pretty big impact to our end users.

The support article you posted said this happens when the web adaptor is "under load", but that is a very relative term. I was wondering if there is a more specific definition of "under load", or had any specific examples of when this happens "under load." We're trying to get a feel if it is "safe" for us to upgrade to 11.3 or not.

[omar-marji]

I ran into this issue as well and was wondering if anyone was able to resolve the issue.

I don't think that "under load" is really a correct term to use here, as I can consistently reproduce this issue by just zooming in and out 3-4 times on one map with just one user.

[SCCGIS]

Hi we are having similar issues. We have an ArcGIS Server 11.3 with all the latest patches (as of two days ago). We have increased CPU, fined tuned services, played with shared vs dedicated. But every so often the server just flakes, and we get we adapter errors when trying to access it on client desktop.  Sometimes it will resolve itself very quickly. Usually, can refresh the browser and its back but sometimes it doesn't have we have to jump on the server and start and stop the ArcGIS Server service or even restart the actual server.

Other times different REST services will just be flaky. They appear to working and you can see them on a map but cant query them. We have been having to republish the services to get them back.

We are in the process of adding a second server into the cluster to load share. So we are doing everything to not put this server under load.