When I run my server, it showed a error all some kind. Code: 20:40:33 [INFO] [Metrics] Unexpected end of file from server What does it mean ?
Is it causing harm ?, if not leave it be. Other wise it will take allot of searching to fix the problem.
Since it's from Metrics, it's probably an intermittant problem with the Metrics server, and will not affect your server at all.