Hi Florin,
I am using api socket only. Below is the vcl config.
*cat /etc/vpp/vcl.conf*
vcl {
app-scope-global
app-scope-local
*api-socket-name /var/run/pw/vpp-api.sock*
use-mq-eventfd
event-queue-size 10000
rx-fifo-size 512000
tx-fifo-size 512000
namespace-id vcl
namespace-secret 123456
}Thanks, Praveen On Mon, Dec 8, 2025 at 12:43 PM Florin Coras via lists.fd.io <fcoras.lists= [email protected]> wrote: > Hi Praveen, > > On Dec 7, 2025, at 10:06 PM, Praveen Singh via lists.fd.io <praveen.553= > [email protected]> wrote: > > Hi Florin, > I ran the app with root permission only, still getting same error message. > > if (vl_socket_client_recv_fd_msg2 (&wrk->bapi_sock_ctx, fds, mp->n_fds, > 5)) > goto failed; > clib_warning("Praveen wrk->bapi_sock_ctx.socket_fd %d fds %d > mp->n_fds %d ", wrk->bapi_sock_ctx.socket_fd, fds,mp->n_fds); > > Below is the output: > vl_api_app_attach_reply_t_handler:87: Praveen wrk->bapi_sock_ctx.socket_fd > 6 fds 1694124968 mp->n_fds 3 > > > Could you also try with app socket api. For config example see here [1] > > Regards, > Florin > > [1] https://wiki.fd.io/view/VPP/HostStack/LDP/iperf > > > Thanks, > Praveen > > On Thu, Nov 20, 2025 at 11:05 AM Florin Coras via lists.fd.io > <[email protected]> wrote: > >> Hi Praveen, >> >> Inline. >> >> On Nov 19, 2025, at 9:19 PM, Praveen Singh via lists.fd.io <praveen.553= >> [email protected]> wrote: >> >> 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 -1* >> >> >> This is used to track vpp’s status. So not critical unless you want vcl >> to reattach after vpp restarts. >> >> >> *vcl_mq_epoll_add_evfd:93: vcl<2105:0>: created mqs_epfd=10 >> wrk->mqs_epfd 5 errno=1 (Operation not permitted)* >> >> >> This is used by vpp to signal the presence of new events in the message >> queue to vcl. If “mqs_epfd” is actually “mq_fd” in that function, the value >> looks reasonable. Maybe this is really a permission problem. Have you tried >> running the app as root? >> >> Regards, >> Florin >> >> *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 >> <[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 >>> <[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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