[FIXED] Failed to instantiate [javax.servlet.Filter]: Factory method 'springSecurityFilterChain' Can't configure antMatchers after anyRequest

Issue

I get this error after upgrading spring boot version to 2.6.2 :

Failed to instantiate [javax.servlet.Filter]: Factory method 'springSecurityFilterChain' threw exception; nested exception is java.lang.IllegalStateException: Can't configure antMatchers after anyRequest

This is my securityConfig class extends fromn WebSecurityConfigurerAdapter.

@Override
protected void configure(HttpSecurity http) throws Exception {
    super.configure(http);
    http.csrf().disable().headers().frameOptions().disable().and().sessionManagement()
        .sessionCreationPolicy(SessionCreationPolicy.STATELESS).and().authorizeRequests().antMatchers("/api/**")
        .authenticated().and()
        .addFilterAfter(new TokenAuthenticationProcessingFilter(
            new PiAuthenticationProvider(
                new ApplicationPropertiesDataAdapterPi(this.applicationProperties)),
            "/api/**", null, new CustomAuthenticationFailureHandler(),
            AuthTokenUtil::extractXAuthorizationToken), BasicAuthenticationFilter.class);
}

Solution

When you call super.configure(http) it actually does the following:

    protected void configure(HttpSecurity http) throws Exception {
        this.logger.debug("Using default configure(HttpSecurity). "
                + "If subclassed this will potentially override subclass configure(HttpSecurity).");
        http.authorizeRequests((requests) -> requests.anyRequest().authenticated());
        http.formLogin();
        http.httpBasic();
    }

And after that you are trying to execute .authorizeRequests().antMatchers("/api/**") once again which causes this error. So simply don't call super.configure(http) and implement all logic you need in your method

Answered By - Andrey Grigoriev
Answer Checked By - Clifford M. (JavaFixing Volunteer)