In scarce scenarios, when requests to the vpxa service take lengthy, such as awaiting usage of a slow datastore, the request queue on vpxa might exceed the Restrict of file descriptors. To avoid this from going on, Plesk generates a temporary server hostname if the actual server hostname is non-resolvable. https://devinozlxh.blogs100.com/28495786/examine-this-report-on-plesk-migration-to-new-server