fixed exception retry to Instance boot.
fixed exception retry to Instance boot.

edurange/edurange,donkey-hotei/edurange,donkey-hotei/edurange,donkey-hotei/edurange,edurange/edurange-server,edurange/edurange-server,edurange/edurange,donkey-hotei/edurange,edurange/edurange,edurange/edurange-server,edurange/edurange-server,edurange/edurange