Set<InternalDistributedMember> adviseCacheServers() {
    getAdvisee().getCancelCriterion().checkCancelInProgress(null);
    return adviseFilter(profile -> {
      assert profile instanceof CacheProfile;
      CacheProfile cp = (CacheProfile) profile;
      return cp.hasCacheServer;
    });
  }
Returns the list of all persistent members. For most cases, adviseInitializedPersistentMembers
is more appropriate. These method includes members that are still in the process of GII.
geode-core/src/main/java/org/apache/geode/internal/cache/CacheDistributionAdvisor.java