I installed a fresh Forge (1.8.9-126.96.36.1992) server (with Sponge 1.8.9-1691-3.1.0-BETA-1046). The host (running Debian) is headless, Minecraft starts correctly, but one line in the startup log is worrisome:
[main/ERROR] [FML]: FML appears to be missing any signature data. This is not a good thing
There are no more errors (only
INFO messages). I believe that FML means Forge Mod Loader, which then appears with its own log messages (like
[FML]: Forge Mod Loader has successfully loaded 4 mods) and otherwise the server works fine (at least seems to do so, I connected from a client and walked around without issues.
Is this something I should be worried about?