Scheduled executor returns to cleaned up room

[ebullient]

mediator    | [ERROR   ] CWWKC1101E: The task org.gameontext.mediator.room.RemoteRoom$$Lambda$37/00000000B803AE60@42eedf88, which was submitted to executor service managedScheduledExecutorService[DefaultManagedScheduledExecutorService], failed with the following error: java.lang.NullPointerException
mediator    | 	at org.gameontext.mediator.room.WebSocketClientConnection.keepAlive(WebSocketClientConnection.java:94)
mediator    | 	at org.gameontext.mediator.room.RemoteRoom.lambda$new$0(RemoteRoom.java:55)
mediator    | 	at org.gameontext.mediator.room.RemoteRoom$$Lambda$37.00000000B803AE60.run(Unknown Source)
mediator    | 	at com.ibm.ws.concurrent.internal.ScheduledTask.call(ScheduledTask.java:382)
mediator    | 	at [internal classes]
mediator    | .

mediator    | [ERROR   ] CWWKC1101E: The task org.gameontext.mediator.room.RemoteRoom$$Lambda$37/00000000B803AE60@582137e5, which was submitted to executor service managedScheduledExecutorService[DefaultManagedScheduledExecutorService], failed with the following error: java.lang.NullPointerException
mediator    | 	at org.gameontext.mediator.room.WebSocketClientConnection.keepAlive(WebSocketClientConnection.java:94)
mediator    | 	at org.gameontext.mediator.room.RemoteRoom.lambda$new$0(RemoteRoom.java:55)
mediator    | 	at org.gameontext.mediator.room.RemoteRoom$$Lambda$37.00000000B803AE60.run(Unknown Source)
mediator    | 	at com.ibm.ws.concurrent.internal.ScheduledTask.call(ScheduledTask.java:382)
mediator    | 	at [internal classes]
mediator    | .
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