Hi Florin, Thank you for your reply. Here is the additional log which I printed. VCL<2105>: configured namespace_id vcl VCL<2105>: configured namespace_secret 123456 (0x1e240) VCL<2105>: completed parsing vppcom config! vppcom_app_create:1503: vcl<0:-1>: Allocate default worker vcl_worker_alloc_and_init:287: vcl<2105:0>: Praveen: worker index 0, worker mqs_epfd 5, wrk->app_api_sock.fd clib_socket_init:639: Praveen: socket (fd 6, '/var/run/pw/vpp-api.sock') vcl_bapi_connect_to_vpp:558: vcl<2105:0>: app (test-wrk-0) is connected to VPP! vcl_bapi_init:663: vcl<2105:0>: sending session enable
*vcl_mq_epoll_add_api_sock:54: vcl<2105:0>: created cs->fd=0 wrk->mqs_epfd 5 errno=1 (Operation not permitted) rv -1vcl_mq_epoll_add_evfd:93: vcl<2105:0>: created mqs_epfd=10 wrk->mqs_epfd 5 errno=1 (Operation not permitted)vppcom_app_create:1513: vcl<2105:0>: app_name 'test', my_client_index 1280 (0x500)* DEBUG: vcl_app_create_wrapper: VCL app creation - app_name=test, ret=0 vppcom_session_create:1572: vcl<2105:0>: created session 0 DEBUG: vcl_socket_wrapper: VCL socket created - domain=2, type=2, proto=17, options=2, sockfd=0, errno=0 (Success) DEBUG: vcl_bind_wrapper: === BIND OPERATION START === DEBUG: vcl_bind_wrapper: sockfd=0, addrlen=16 vppcom_session_bind:1767: vcl<2105:0>: session 0 handle 0: binding to local IPv4 address 10.166.220.80 port 862, proto UDP vppcom_session_listen:1796: vcl<2105:0>: session 0: sending vpp listen request... vcl_send_session_listen:75: vcl_send_session_listen: vnode id:0 thread id:0 clt:1280 wrk:0 port:24067 proto:1 vcl_session_app_add_segment_handler:992: vcl<2105:0>: mapped new segment 'seg-5-6-52' size 134230016 vcl_session_bound_handler:602: vcl<2105:0>: session 0 [0xf]: listen succeeded! DEBUG: vcl_bind_wrapper: VCL bind result - sockfd=0, ret=0, errno=0 (Success) DEBUG: vcl_bind_wrapper: VCL bind successful - sockfd=0 One more question, What is the impact of the below error? vcl_mq_epoll_add_evfd:90: vcl<118:0>: failed to add mq socket to mq epoll fd Thanks, Praveen On Thu, Nov 20, 2025 at 1:19 AM Florin Coras via lists.fd.io <fcoras.lists= [email protected]> wrote: > Hi Praveen, > > You’d probably have to check the exact reason why epoll_ctl fails. But > some quick comments: > - we’re moving away from binary api in vcl. We’re still building it but > it’s slowly being deprecated. I’d recommend switching to sapi api. > - maybe check vl_api_app_attach_reply_t_handler and confirm that > wrk->app_event_queue fd we got from vl_socket_client_recv_fd_msg2 is > reasonable. > > Regards, > Florin > > > On Nov 18, 2025, at 7:59 PM, Praveen Singh via lists.fd.io <praveen.553= > [email protected]> wrote: > > > > Hi All, > > When i connected my vcl app, i got below error. any input on below error? > > <inline.0.part> > > > > > > > > > > >
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