}

        while ( true ) {
            Subject s = this.credentials.getSubject();
            if ( ctx == null ) {
                ctx = createContext(trans, tdomain, negoResp, !anonymous, s);
            }
            token = createToken(ctx, token, s);

            if ( token != null ) {

                  .ok());
  ASSERT_TRUE(worker_server2->Start().ok());

  TFE_Context* ctx_0 = CreateContext(serialized_server_def_0,
                                     /*isolate_session_state=*/false,
                                     /*init_timeout_in_ms=*/0);
  TFE_Context* ctx_1 = CreateContext(serialized_server_def_1,
                                     /*isolate_session_state=*/false,