我有以下实用程序方法将域对象的List映射到DTO，从而生成映射对象的列表。
public static <Z, T> List<T> mapList(Mapper mapper, List<Z> source, Class<T> type) {
return source.parallelStream()
.map((s) -> mapper.map(s, type))
.collect(Collectors.toList());
}
作为映射器，我传递DozerBeanMaper的单例实例（由Spring管理的实例）。 List源是hibernate查询的结果。上面的代码工作正常。
现在，我已经更改代码以使用Stream API（我希望并行化映射）：
Caused by: java.lang.NullPointerException
at org.hibernate.engine.internal.StatefulPersistenceContext.getLoadedCollectionOwnerOrNull(StatefulPersistenceContext.java:755)
at org.hibernate.event.spi.AbstractCollectionEvent.getLoadedOwnerOrNull(AbstractCollectionEvent.java:75)
at org.hibernate.event.spi.InitializeCollectionEvent.<init>(InitializeCollectionEvent.java:36)
at org.hibernate.internal.SessionImpl.initializeCollection(SessionImpl.java:1895)
at org.hibernate.collection.internal.AbstractPersistentCollection$4.doWork(AbstractPersistentCollection.java:558)
at org.hibernate.collection.internal.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:260)
at org.hibernate.collection.internal.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:554)
at org.hibernate.collection.internal.AbstractPersistentCollection.read(AbstractPersistentCollection.java:142)
at org.hibernate.collection.internal.PersistentSet.iterator(PersistentSet.java:180)
at org.dozer.MappingProcessor.addOrUpdateToList(MappingProcessor.java:766)
at org.dozer.MappingProcessor.addOrUpdateToList(MappingProcessor.java:850)
at org.dozer.MappingProcessor.mapListToList(MappingProcessor.java:686)
at org.dozer.MappingProcessor.mapCollection(MappingProcessor.java:553)
at org.dozer.MappingProcessor.mapOrRecurseObject(MappingProcessor.java:434)
at org.dozer.MappingProcessor.mapFromFieldMap(MappingProcessor.java:342)
at org.dozer.MappingProcessor.mapField(MappingProcessor.java:288)
at org.dozer.MappingProcessor.map(MappingProcessor.java:248)
at org.dozer.MappingProcessor.map(MappingProcessor.java:197)
at org.dozer.MappingProcessor.mapCustomObject(MappingProcessor.java:495)
at org.dozer.MappingProcessor.mapOrRecurseObject(MappingProcessor.java:446)
at org.dozer.MappingProcessor.mapFromFieldMap(MappingProcessor.java:342)
at org.dozer.MappingProcessor.mapField(MappingProcessor.java:288)
at org.dozer.MappingProcessor.map(MappingProcessor.java:248)
at org.dozer.MappingProcessor.map(MappingProcessor.java:197)
at org.dozer.MappingProcessor.map(MappingProcessor.java:187)
at org.dozer.MappingProcessor.map(MappingProcessor.java:124)
at org.dozer.MappingProcessor.map(MappingProcessor.java:119)
at org.dozer.DozerBeanMapper.map(DozerBeanMapper.java:120)
at
org.mycompany.myproject.utils.BeanMapperUtil.lambda$0(BeanMapperUtil.java:30)
并获得以下内容：
source.stream()execption重复自身，最后变成StackOverFlowErorr。
如果我使用source.parallelStream()代替gwmi Win32_Process，我就不会收到任何错误。
有什么想法吗？