@Override
  public void setAlertLevelAsString(String level) {
    String newLevel = level != null ? level.trim() : null;
    try {
      super.setAlertLevelAsString(newLevel);
    } catch (IllegalArgumentException e) {
      throw new RuntimeMBeanException(e, e.getMessage());
    }
  }
This method is used to process ClientMembership events sent for BridgeMembership by bridge
servers to all admin members.

@param senderId id of the member that sent the ClientMembership changes for processing (could
       be null)
@param clientId id of a client for which the notification was sent
@param clientHost host on which the client is/was running
@param eventType denotes whether the client Joined/Left/Crashed should be one of
       ClientMembershipMessage#JOINED, ClientMembershipMessage#LEFT,
       ClientMembershipMessage#CRASHED
geode-core/src/main/java/org/apache/geode/admin/jmx/internal/AdminDistributedSystemJmxImpl.java