@Override
    public OperationHandle getFunctions(SessionHandle sessionHandle, String catalogName, String schemaName,
                                        String functionName) throws HiveSQLException {
      return cliService.getFunctions(sessionHandle, catalogName, schemaName, functionName);
    }
RetryingThriftCLIServiceClient. Creates a proxy for a CLIServiceClient
implementation and retries calls to it on failure.
service/src/java/org/apache/hive/service/cli/thrift/RetryingThriftCLIServiceClient.java