Emergency Console

You should never start more than one server using the same database directory,independent of the mode of operation. Normally, ArangoDB will preventyou from doing this by placing a lockfile in the database directory andnot allowing a second ArangoDB instance to use the same database directoryif a lockfile is already present.

Note: Never start the emergency console for a database which also has aserver attached to it. In general, the ArangoDB shell is what you want.

However, it is very likely that you will never need the emergency consoleunless you are an ArangoDB developer.