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HostModel: Retry ResourceUpdate on Win32 error (#32347)
This change attempts to fix a non-deterministic customer reported failure. Several customers have observed failure during resource update when the HostModel updates the AppHost (to transfer resources from the managed app). The failure is not detereminisitc, not reproducible on our machines, and depends on specific computers/software running. This indicates interference by other software while the HostWriter is updating the AppHost. The current implementation retries the resource update if an update because the device or drive is locked (say by an antivurus) HRESULT 0x21 and 0x6C. However, the failures reported have errors 0x5 (Access violation) and 0x6# (Open failed). Windows/Defender team said that file-locking with these error-codes is not expected. However, different AVs work differently about examining files. We believe that the correct fix for this issue is to complete: To implement #3828 and #3829 Ship AppHost with an extension/permissions not indicating an executable. However the above is a fairly large change for servicing .net core 3.1. So, this change implements a simpler fix intended for servicing 3.1 branch: Always retry the resource-update on Win32 error, unless the failure is a knwon irrecoverable code (listed a few error codes relevent to File IO). This change may cause unnecessary retries on legitimate failures (about 50 seconds). But such cases are rare, because the SDK supplies the apphost, and the HostModel itself creates the file to update. Fixes #3832
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