This error is a Java exception that occurs when the code tries to use an object reference that has a null value. In this case, it occurred in the method "getAll" of the class "AttractionDaoImpl" at line 24. It was called by the method "getAll" of the class "AttractionServiceImpl" at line 13, which in turn was called by the "doPost" method of the "IndexServlet" class at line 22 and the "doGet" method of the same class at line 33. Finally, these methods were called by the "service" method of the "HttpServlet" at line 488, and by the "WsFilter" class at line 52.

To fix this error, you need to identify why the object reference was null and either initialize it properly or handle the null value appropriately


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