Issue: When a large number of revocation requests are sent to the authorization server (Identity Server), the server might not be able to handle the requests. In such cases, the server sends the response with the 503 services unavailable message.
Workaround: In Identity Server’s tomcat.conf file, restrict the number of requests by setting the appropriate value for the number of requests in the JAVA_OPTS="${JAVA_OPTS} -Dcom.novell.oauth.threshold.maxrequestsallowed parameter. The default value is 500.
For information about how to modify a file, see Modifying Configurations.
For information about updating the value, see Restricting the Number of Requests.