java.lang.NullPointerException
at com.javacodegeeks.concurrent.ConcurrentLinkedHashMap$Segment.clear(ConcurrentLinkedHashMap.java:771)
at com.javacodegeeks.concurrent.ConcurrentLinkedHashMap.clear(ConcurrentLinkedHashMap.java:1206)
at com.openexchange.tools.oxfolder.memory.ConditionTreeMapManagement.stop(ConditionTreeMapManagement.java:159)
...