+ /**
+ * <b>IMPORTANT:</b><br>
+ * This serialVersionUID must be kept in sync with the serialVersionUID which is generated
+ * on the fly for serialized AbstractPersistentCollection objects coming from the httpInvoker
+ * service.
+ * This is most probably necessary after updating hibernate to a newer version. In any case
+ * it the need for updating this <code>serialVersionUID</code> becomes obvious when the attempt
+ * to connect to the server side fails with an <code>InvalidClassException</code>:
+ *
+ * <pre>
+ * java.io.InvalidClassException: org.hibernate.collection.internal.AbstractPersistentCollection;
+ * local class incompatible:
+ * stream classdesc serialVersionUID = 2742261122392386159,
+ * local class serialVersionUID = -7238232378593030571
+ * </pre>
+ * The correct <code>serialVersionUID</code> is the <code>stream classdesc serialVersionUID</code>
+ * from the error message.
+ */
+ private static final long serialVersionUID = 7094296207968006972L;