Use below code to skip a locked row. This is the alternate of
> select * from student where student id = n for update nowait
findStudnt method throws error if row is already locked. If there is no error call updateStudent method to update student entity else log the error for audit. @Override public Student findStudent(final Long studentId) { TypedQuery<Student> query = getEntityManager().createNamedQuery("from Student s where s.studentId =:studentId", Student.class); query.setParameter("studentId", studentId); query.setLockMode(LockModeType.PESSIMISTIC_WRITE); query.setHint(JAVAX_PERSISTENCE_LOCK_TIMEOUT, ZERO_NUMBER); return query.getSingleResult(); }
@Override @Transactional(readOnly = false, propagation = Propagation.REQUIRED) public void updateStudent(Student student) { makePersistent(student); getEntityManager().flush(); }

Use below code to skip a locked row. This is the alternate of "select * from student where student id = n for update nowait" query.
findStudnt method throws error if row is already locked. If there is no error call updateStudent method to update student entity else log the error for audit.
@Override public Student findStudent(final Long studentId) { TypedQuery<Student> query = getEntityManager().createNamedQuery("from Student s where s.studentId =:studentId", Student.class); query.setParameter("studentId", studentId); query.setLockMode(LockModeType.PESSIMISTIC_WRITE); query.setHint(JAVAX_PERSISTENCE_LOCK_TIMEOUT, ZERO_NUMBER); return query.getSingleResult(); } @Override @Transactional(readOnly = false, propagation = Propagation.REQUIRED) public void updateStudent(Student student) { makePersistent(student); getEntityManager().flush(); }