For the entire time a few players are logged in, constant spam of the following message over and over in the logs. Stops when player logs out.
[2015-11-09 04:34:41] [SERVER] #### EXCEPTION: Object was hidden. Throwing NullPointer
[2015-11-09 04:34:41] [KINEMATICCONTROLLER][UPDATEACTION] Server(0) NULLPOINTER EXCEPTION: CAUSED BY PlayerCharacter[(ENTITY_PLAYERCHARACTER_Replaced_Name)(3155)]: In sector 560; hidden: true
[2015-11-09 04:34:41] java.lang.NullPointerException
[2015-11-09 04:34:41] at obfuscated.VX.updateAction(SourceFile:392)
[2015-11-09 04:34:41] at obfuscated.Wa.updateActions(SourceFile:1401)
[2015-11-09 04:34:41] at obfuscated.Wa.internalSingleStepSimulation(SourceFile:1354)
[2015-11-09 04:34:41] at obfuscated.Wa.stepSimulation(SourceFile:1298)
[2015-11-09 04:34:41] at com.bulletphysics.dynamics.DynamicsWorld.stepSimulation(DynamicsWorld.java:58)
[2015-11-09 04:34:41] at obfuscated.aBK.a(SourceFile:1703)
[2015-11-09 04:34:41] at obfuscated.Wi.a(SourceFile:577)
[2015-11-09 04:34:41] at obfuscated.Zg.a(SourceFile:2133)
[2015-11-09 04:34:41] at org.schema.game.common.data.world.Universe.updateSector(SourceFile:1025)
[2015-11-09 04:34:41] at org.schema.game.common.data.world.Universe.update(SourceFile:1057)
[2015-11-09 04:34:41] at org.schema.game.server.controller.GameServerController.update(SourceFile:1179)
[2015-11-09 04:34:41] at org.schema.schine.network.server.ServerController.run(SourceFile:256)
[2015-11-09 04:34:41] at java.lang.Thread.run(Unknown Source)