protected void verifyNegotiatedQop() throws IOException {
    SaslUtil.verifyNegotiatedQop(saslProps.get(Sasl.QOP),
      (String) saslClient.getNegotiatedProperty(Sasl.QOP));
  }
Check that SASL has successfully negotiated a QOP according to the requested rpcProtection
@throws IOException if the negotiated QOP is insufficient
hbase-client/src/main/java/org/apache/hadoop/hbase/security/AbstractHBaseSaslRpcClient.java