An additional ad-hoc blackout was created on the object via commandline. When remove the ad-hoch blackout, the scheduled blackout has been removed too due to a wrong command.
Adding the blackout:
foglight$ ./fglcmd.sh -srv <foglight host> -port 8080 -usr foglight -pwd foglight -cmd topology:blackoutobject -query "WebLogicServer where hostName = '<your host name>'" -schedulename AdHocBlackout -inheritable
Removing the blacklut:
foglight$ ./fglcmd.sh -srv <foglight host> -port 8080 -usr foglight -pwd foglight -cmd topology:blackoutobject -query "WebLogicServer where hostName = '<your host name>'" -schedulename AdHocBlackout -clear
The "-clear" parameter removes all schedules assigned to the object - from the command line reference document:
"clear: Instructs Foglight to remove any schedules associated with one or more specified topology objects."
Instead of the "-clear" parameter use the "-remove" parameter - from the command line reference document:
"remove: Indicates that the specified schedule should be removed from one or more specified objects."
The correct command is:
foglight$ ./fglcmd.sh -srv <foglight host> -port 8080 -usr foglight -pwd foglight -cmd topology:blackoutobject -query "WebLogicServer where hostName = '<your host name>'" -schedulename AdHocBlackout -remove