Search code examples
spring-bootwildflyundertow

Spring Boot on WildFly (or Undertow): Servlet Filter's orders are reversed

I deployed my Spring Boot Web application on WildFly 8.1, but now I have some trouble.

When application was deployed, FilterRegistrationBeans register Servlet Filters. I know FilterRegistrationBeans are oredered by AnnotationAwareOrderComparator, and those filters are registerd by that order. But when I access my application, Undertow calls filters by reversed order.

For example, if Spring Boot register filters like that:

  • errorPageFilter
  • metricFilter (from Spring Boot actuator)
  • characterEncodingFilter
  • hiddenHttpMethodFilter
  • springSecurityFilterChain (from Spring Security)

Undertow call those filters like that:

  • springSecurityFilterChain
  • hiddenHttpMethodFilter
  • characterEncodingFilter
  • metricFilter
  • errorPageFilter

How can I specify those filters order correctly? Some filter's order (like org.springframework.boot.context.web.ErrorPageFilter) was hard-coded in source, I can't specify that.

Solution

  • This appears to be an Undertow bug that occurs when matchAfter is false in FilterRegistrationImpl#addMappingForUrlPatterns, instead of inserting the filter before all declared filters it inserts it before all filters.