Issue FPM stands for FastCGI Process Manager FPM (FastCGI Process Manager) is an alternative PHP FastCGI implementation with some additional features (mostly) useful for heavy-loaded sites. mntsvc pro...Issue FPM stands for FastCGI Process Manager FPM (FastCGI Process Manager) is an alternative PHP FastCGI implementation with some additional features (mostly) useful for heavy-loaded sites. mntsvc provides remote mroot access when accessing SPI. While accessing the file name we panicked with assertion failure.