Bukkit

What is the problem?
While trying to use HawkEye to check a greifed area, I started getting the error "com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure" out of the blue.

What steps will reproduce the problem?
I'm not sure how to reproduce this error, as nothing changed in the database or the config at the time the problem started happening.

What version of HawkEye are you using (shown in console during start-up)?
1.0.7

Show me any console errors and/or your start-up console message for HawkEye
[SEVERE] [HawkEye] Error whilst attempting to get connection: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
[SEVERE] [HawkEye] Error initiating HawkEye database connection, disabling plugin
[INFO] [HawkEye] Disabling HawkEye v1.0.7
[INFO] [HawkEye] Version 1.0.7 disabled!

Show me your config.yml and/or your config.php (REMOVE YOUR PASSWORD)
log:
  lava-bucket: true
  water-bucket: true
  painting-place: true
  pvp-death: true
  mob-death: true
  other-death: true
  command: true
  chat: true
  join: true
  quit: true
  door-interact: true
  open-container: true
  container-transaction: true
  item-pickup: true
  item-drop: true
  button: true
  teleport: true
  lever: true
  sign-place: true
  sign-break: true
  painting-break: true
  flint-steel: true
  block-place: true
  block-break: true
  block-burn: true
  block-fade: true
  block-form: true
  leaf-decay: true
  mushroom-grow: true
  tree-grow: true
  water-flow: false
  lava-flow: false
  explosion: true
  enderman-pickup: true
  enderman-place: true
  entity-kill: true
  other: true
general:
  max-lines: 0
  log-item-drops-on-death: false
  cleanse-period: 60m
  cleanse-age: 1w
  delete-data-on-rollback: true
  log-ip-addresses: true
  debug: false
  max-radius: 0
  give-user-tool: true
  tool-block: '17'
  default-here-radius: 5
  default-tool-command: ''
  check-for-updates: true
  op-permissions: false
mysql:
  hawkeye-table: hawkeye
  port: 1030
  player-table: hawk_players
  username: **********
  world-table: hawk_worlds
  hostname: ***.***.***.***
  max-connections: 10
  password: **************
  database: mksminecraft
ignore-worlds:
- thisworldisignored
- soisthisone
version: 1.0.7
command-filter:
- /login
- /restartsrv
- /register
block-filter:
- 140
- 150

Have you checked the FAQ page?
Yes, nothing there about my situation (hosting data on external SQL server, host allows outgoing MySQL connections)

Notes:
I have checked all the data for both the MySQL database and in the config, and nothing appeared to be wrong. The database had 100mb (1/3) of free space in it, the information matched up, the only thing I've changed (and this was after the problem started happening) was the port.