@Override
      public void init(FilterConfig filterConfig) throws ServletException {
        String customHeader = filterConfig.getInitParameter(XSRF_CUSTOM_HEADER_PARAM);
        if (customHeader != null) {
          headerName = customHeader;
        }
        String customMethodsToIgnore = filterConfig.getInitParameter(
            XSRF_CUSTOM_METHODS_TO_IGNORE_PARAM);
        if (customMethodsToIgnore != null) {
          parseMethodsToIgnore(customMethodsToIgnore);
        }
      }
A JAAS configuration for ZooKeeper clients intended to use for SASL
Kerberos.
shims/common/src/main/java/org/apache/hadoop/hive/shims/Utils.java