@Override
  public void resetHealth() {
    checkClosed();

    overallHealth = GOOD_HEALTH;
    okayHealth.clear();
    poorHealth.clear();

    synchronized (this) {
      for (final Object value : hostMembers.values()) {
        List members = (List) value;
        for (final Object o : members) {
          GemFireVM member = (GemFireVM) o;
          member.resetHealthStatus();
        }
      }
    }
  }
Resets the overall health to be {@link #GOOD_HEALTH}. It also resets the health in the member
VMs.

@see GemFireVM#resetHealthStatus
geode-core/src/main/java/org/apache/geode/admin/internal/GemFireHealthImpl.java