https://github.com/wildfly/wildfly-core/blob/master/controller/src/main/java/org/jboss/as/controller/ModelControllerImpl.java#L337 and https://github.com/wildfly/wildfly-core/blob/master/controller/src/main/java/org/jboss/as/controller/ModelControllerImpl.java#L401 create a new SecureRandom which is used to seed a normal Random, and that is thrown away after one use. That causes it to use entropy from the OS pool, which if done at a sufficiently high rate on servers can cause stalls.

I can't think of any reason why the operation ID would need to be a secure random number rather than a normal one, so unless there is one it may be better to use a normal Random and not drain the entropy pool.