Login failed when using custom Grails Spring Security filter

I am using Grails with the Spring Security plugin.

I have crafted a custom filter, authentication provider, and token and registered them as beans and into filter chain:

SpringSecurityUtils.clientRegisterFilter('myFilter',SecurityFilterPosition.SECURITY_CONTEXT_FILTER.order + 10) 

(I am not really sure what the order should be)

I POST to j_spring_security_check.

All seems to run smoothly to my successfulAuthentication where I set:

SecurityContextHolder.getContext().setAuthentication开发者_开发问答(authResult);

with no errors and SecurityContextHolder.getContext().getAuthentication() is set.

However Grails redirects me to login failed page.

Is something wrong with the j_spring_security_check page? Where is the error?

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It was the url j_spring_security_check - it somehow rewrote the security context. So on using custom filters DO NOT use post url "j_spring_security_check", not necessary also.