spring security loadUserByUsername username empty after login url is not used for a few days - spring-security

Question

#Autowired
private BCryptPasswordEncoder passwordEncoder;
#Override
protected void configure(AuthenticationManagerBuilder auth) throws Exception {
auth
.userDetailsService(cUserDetailService)
.passwordEncoder(passwordEncoder);
}
#Override
protected void configure(HttpSecurity http) throws Exception {
http
.authorizeRequests()
.antMatchers("/user/**").authenticated()
.and()
.csrf().disable()
.formLogin()
.usernameParameter("username")
.passwordParameter("password")
.successHandler(successHandler)
.failureHandler(failureHandler)
.and()
.logout()
.logoutSuccessHandler(logoutSuccessHandler)
.and()
.exceptionHandling()
.authenticationEntryPoint(authEntryPoint)
.accessDeniedHandler(accessDeniedHandler)
.and()
.sessionManagement()
.sessionCreationPolicy(SessionCreationPolicy.IF_REQUIRED)
.maximumSessions(1)
.maxSessionsPreventsLogin(false);
}
public class CUserDetailService implements UserDetailsService {
#Autowired
private UserDetailDataEntityRepository userDetailDataEntityRepository;
#Override
public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
log.info("username: " + username + ", " );
log.info(username == null);
Optional<UserDetailDataEntity> optional = userDetailDataEntityRepository.findByUsername(username);
if (optional.isPresent()) {
return optional.get();
} else {
throw new UsernameNotFoundException(username);
}
}
}
I used this config for my spring security, and got success login at first.
but then we find that if nobody access the server(even the login url) for a few days, and do login again the loadUserByUsername username will be empty and get login fail
FYI I used redis for session manage by adding dependency
<dependency>
<groupId>org.springframework.session</groupId>
<artifactId>spring-session-data-redis</artifactId>
</dependency>
and the login request is a form request