In Spring Security 5, the default behavior is to query the xref:servlet/architecture.adoc#savedrequests[saved request] on every request.
This means that in a typical setup, that in order to use the xref:servlet/architecture.adoc#requestcache[`RequestCache`] the `HttpSession` is queried on every request.
In Spring Security 6, the default is that `RequestCache` will only be queried for a cached request if the HTTP parameter `continue` is defined.
This allows Spring Security to avoid unnecessarily reading the `HttpSession` with the `RequestCache`.
In Spring Security 5 the default is to use `HttpSessionRequestCache` which will be queried for a cached request on every request.
If you are not overriding the defaults (i.e. using `NullRequestCache`), then the following configuration can be used to explicitly opt into the Spring Security 6 behavior in Spring Security 5.8:
There are no further migration steps for this feature.
However, if you run into trouble with this enhancement, you can instead <<servlet-replace-methodsecurity-with-globalmethodsecurity,revert the behavior>>.
== Reactive
=== Use `AuthorizationManager` for Method Security
If you run into trouble with this enhancement, you can instead <<reactive-change-to-useauthorizationmanager-false,revert the behavior>>.
In 6.0, `@EnableReactiveMethodSecurity` defaults `useAuthorizationManager` to `true`.
So, to complete migration, {security-api-url}org/springframework/security/config/annotation/method/configuration/EnableReactiveMethodSecurity.html[`@EnableReactiveMethodSecurity`] remove the `useAuthorizationManager` attribute:
To opt out of `AuthorizationManager` for Method Security, replace xref:servlet/authorization/method-security.adoc#jc-enable-method-security[method security] with xref:servlet/authorization/method-security.adoc#jc-enable-global-method-security[global method security]
For applications using xref:servlet/authorization/method-security.adoc#jc-enable-method-security[pre-post annotations], make sure to turn it on to reactivate the behavior.
Other usages can simply change {security-api-url}org/springframework/security/config/annotation/method/configuration/EnableMethodSecurity.html[`@EnableMethodSecurity`] and xref:servlet/appendix/namespace/method-security.adoc#nsa-method-security[`<method-security>`] to {security-api-url}org/springframework/security/config/annotation/method/configuration/EnableGlobalMethodSecurity.html[`@EnableGlobalMethodSecurity`] and xref:servlet/appendix/namespace/method-security.adoc#nsa-global-method-security[`<global-method-security>`], like so:
To opt-out of {security-api-url}org/springframework/security/authorization/AuthorizationManager.html[`AuthorizationManager`] for reactive method security, add `useAuthorizationManager = false`:
