update

edu-user/edu-user-biz/src/main/java/com/keao/edu/user/service/impl/ExamCertificationServiceImpl.java

@@ -113,7 +113,9 @@ public class ExamCertificationServiceImpl extends BaseServiceImpl<Long, ExamCert
 	public ExamCertificationDto findDetailByStudentId(Long examRegistrationId) {
 		ExamCertificationDto examCertificationDto = examCertificationDao.getExamCertificationDto(examRegistrationId);
 		Subject subject = subjectDao.get(examCertificationDto.getSubjectId());
-		examCertificationDto.setSubjectName(subject.getName());
+		if(subject != null){
+			examCertificationDto.setSubjectName(subject.getName());
+		}
 		Student student = studentService.getStudent(examCertificationDto.getStudentId());
 		examCertificationDto.setRealName(student.getRealName());
 		examCertificationDto.setGender(student.getGender());