Hi Jonathan,
thanks for your reply. I do have a tech support case open but so far to no avail. Please see my answers to your questions below. I appreciate any insights or suggestions.
Do you see a java.exe process running on the machine? Yes, several. But the machine runs ArcGIS Server as well so some of them are likely from ArcGIS Server and not from Portal.
I assume you've tried to restart the service? Yes.
If you were to reindex with the Portal logging DEBUG logs, do you see any errors in the logs?
Yes, here is what I see in the logs:
Indexer response. Error occurred during initialization of VM Unable to allocate 262144KB bitmaps for parallel garbage collection for the requested 8388608KB heap. Error: Could not create the Java Virtual Machine. Error: A fatal exception has occurred. Program will exit.
Simultaneously Windows gives me the warning "Your computer is low on memory. To restore enough memory for programs to work correctly, save your files and then close or restart all open programs." But as you can see in below screenshot the total memory used is only at 59%. I see the same warning sometimes when I run Python scripts or ArcGIS Pro on that VM.
Is there anything my IT department should configure differently on the VM? What pointers can I give them so they know where to look? Anybody else experience with this?