Hello all

Using CAS 6.6.15 in a Docker setup with LDAP user repository.

CAS/SAML/OIDC authentication works with no problem. Throttling CAS auth 
requests also works without a problem.

The relevant throtlling configuration in cas.properties is as follows:

# Failure Throttling
cas.authn.throttle.failure.threshold=1
cas.authn.throttle.failure.code=AUTHENTICATION_FAILED
cas.authn.throttle.failure.range-seconds=30
cas.authn.throttle.core.username-parameter=username

We have enabled REST Authentication which works without a problem:

/# curl -sk https://sso-server:8443/cas/v1/users -d 
'username=test&password=test'|jq .authentication.credentials
[
  {
    "@class": 
"org.apereo.cas.authentication.metadata.BasicCredentialMetaData",
    "id": "test",
    "credentialClass": 
"org.apereo.cas.authentication.credential.UsernamePasswordCredential"
  }
]

REST and throttling implementation in build.gradle:

    implementation "org.apereo.cas:cas-server-support-throttle"
    implementation "org.apereo.cas:cas-server-support-rest"

Yet no matter how we try, throttling REST auth requests does not work. 
Looking at the relevant code 
<https://github.com/apereo/cas/blob/5e1035dde95094a951c9ea87993cdea29ab6c85c/support/cas-server-support-rest/src/main/java/org/apereo/cas/config/CasRestAutoConfiguration.java#L127>,
 
I see that throttling is implemented. Nevertheless, the debug line 
<https://github.com/apereo/cas/blob/5e1035dde95094a951c9ea87993cdea29ab6c85c/support/cas-server-support-rest/src/main/java/org/apereo/cas/config/CasRestAutoConfiguration.java#L143>
 
about "Activating authentication throttling for REST endpoints..." does not 
seem to be called.

My fear is for a race condition where REST is initialized before throttling 
and the check 
<https://github.com/apereo/cas/blob/5e1035dde95094a951c9ea87993cdea29ab6c85c/support/cas-server-support-rest/src/main/java/org/apereo/cas/config/CasRestAutoConfiguration.java#L129>
 
for the relevant bean fails.

Any help would be appreciated.

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