Concurrency Issue in BeanFactoryTypeConverter

PropertyEditor s are not thread safe.

INT-2889 Fixed a concurrency problem in the BeanFactoryTypeConverter when a property editor is used when there is not a converter in the conversion service (synchronized the set/get).

However, this only applied if the source type was not String (the reported problem was with the UUID).

In the case where the source is a string, the type converter delegates to the SimpleTypeConverter. We need to synchronize access to the delegate to prevent concurrent use of the PropertyEditor.