Your questions can be answered by reading the application help. Anyway: 1) Then the ICM won't be restarted, e.g. it will be shutdown. No futher options. 2) In maintenance mode client connections are denied, see the application help for details. 3) You can't use the option unless you are in Emergency Mode and the only way to get there is if there is communication error with the ICM. In Emergency Mode most functions of the ICM are disabled. 4) Local means the current instance, global means the whole cluster (all application instances).
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