Bukkit

This page descripes the hidden panic settings:

The panic settings allow to add some actions if hidePlayer or showPlayer fails due to CraftBukkit/Minecraft bugs.

These settings are hidden and have to be added manually, they are all inactive by default.

Mind the following:

• These settings will most likely not prevent the server crash, but they can help tackle the situation, for instance by running a command that makes your server restart (would demand another plugin listening for that command, though stop might work too, if a container application then restarts the server).
• The settings not very well tested and are not guaranteed to work.

You can do (executed in that order):

• Kick the players involved in show or hide.
  panic.kick-involved: true
• Kick all online players
  panic.kick-all: true
• Configurable Kick message.
  panic.kick-message: '[ERROR] Log in again and contact an admin.'
• Send a message to predfined targets:
  panic.message: '...'
  panic.message-targets: "..."
  Targets such as "all", "ops", "permission: a.b.c", also as comma separated sequence of entries. Write just something like none to have no message.
• Run a command:
  panic.run-command: true
  panic.command: '...'
  For instance "stop" or "someplugin recovery"

Example section for the confiuration:

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# This is an example, choose what you think would make sense.
panic:
  kick-involved: true
  kick-all: true
  kick-message: '[ERROR] Log in again and contact an admin.'
  message: '§a[SimplyVanish] §eAdmin notice: check the logs !'
  message-targets: "all"
  run-command: true
  command: "say Which command was i intended to run?"