Spring security Azure active directory - spring-boot

Question

Could you please suggest how to increase the timeout. I am getting below exception and this is not coming every time. I have Angular 5 as front end and in back end using Spring Boot 2.0.4 and azure active directory release 2.0.5 (latest).
com.nimbusds.jose.RemoteKeySourceException: Couldn't retrieve remote JWK set: Read timed out.Below is my source code.
Thank in advance.
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import com.microsoft.azure.spring.autoconfigure.aad.AADAuthenticationFilter;
#EnableWebSecurity
#EnableGlobalMethodSecurity(securedEnabled = true,prePostEnabled = true)
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
#Autowired
private AADAuthenticationFilter aadAuthFilter;
#Override
protected void configure(HttpSecurity http) throws Exception {
http.authorizeRequests().antMatchers("/api/ppo/dashboard/dashboardstats").permitAll();
http.authorizeRequests().antMatchers("/api/ppo/dashboard/castats").permitAll();
http.authorizeRequests().antMatchers("/api/ppo/authenticate/privileges").permitAll();
http.authorizeRequests().antMatchers("/api/ppo/**").authenticated();
//http.authorizeRequests().antMatchers("/api/ppo/autenticate/**").permitAll();
http.logout().logoutRequestMatcher(new AntPathRequestMatcher("/logout"))
.logoutSuccessUrl("/").deleteCookies("JSESSIONID").invalidateHttpSession(true);
//http.authorizeRequests().anyRequest().permitAll();
http.csrf().disable();
http.cors();
// http.csrf().csrfTokenRepository(CookieCsrfTokenRepository.withHttpOnlyFalse());
http.addFilterBefore(aadAuthFilter, UsernamePasswordAuthenticationFilter.class);
}
#Bean
public WebMvcConfigurer corsConfigurer() {
return new WebMvcConfigurer() {
#Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("/api/ppo/**").allowedMethods("GET", "POST", "PUT", "DELETE").allowedOrigins("*")
.allowedHeaders("*");
}
};
}