Check for open sessions, that is, `db.sessions.find({closed_at: new Date("0001-01-01T00:00:00Z")})`, that were created a long time ago but never closed. Consider the value at `last_ping` to know the last time we heard from the client.
Check for open sessions, that is,
db.sessions.find({closed_at: new Date("0001-01-01T00:00:00Z")}), that were created a long time ago but never closed.Consider the value at
last_pingto know the last time we heard from the client.