Hi,
Having an issue with VPP v20.05.1 running on Centos 8.2 1u server.
My application opens a couple of VCL sessions to receive packets from the
interface -
One of the application threads (input thread) calls the following api to
establish new session-
vppcom_worker_register()
vppcom_epoll_create()
vppcom_session_create(VPPCOM_PROTO_UDP, 0)
vppcom_session_attr(sock, VPPCOM_ATTR_SET_CONNECTED, NULL, NULL)
rv_vpp = vppcom_session_bind (sock, &endpt);
rv_vpp = vppcom_session_listen (sock, 10);
rv_vpp = vppcom_epoll_ctl (epfd, EPOLL_CTL_ADD, sock, &listen_ev);
----
Most of the time it works fine. However, sometimes, when the application is
restarted, new sessions are created, but the old ones don't clear up.
And packets received keep getting added to those older sessions, but since
the application is already restarted and created new sessions, the received
packets don't make it to the application. Sometimes it takes a really long
time for the stale sessions to clear up.
When I tried to manually clear those old/stale sessions from vppctl, it
executed the 'clear session' without any errors but doesn't really clear
the session.
[root@J3SGISNCIGW03 download]# vppctl
_______ _ _ _____ ___
__/ __/ _ \ (_)__ | | / / _ \/ _ \
_/ _// // / / / _ \ | |/ / ___/ ___/
/_/ /____(_)_/\___/ |___/_/ /_/
vpp# sh threads
ID Name Type LWP Sched Policy (Priority)
lcore Core Socket State
0 vpp_main 2441327 other (0) 1
1 0
1 vpp_wk_0 workers 2441329 other (0) 2
2 0
2 vpp_wk_1 workers 2441330 other (0) 3
3 0
3 vpp_wk_2 workers 2441331 other (0) 4
4 0
4 vpp_wk_3 workers 2441332 other (0) 5
8 0
vpp# sh session thread 3 verbose
[3:0][U] 2001:5b0:ffff:501:b883:31f:49e:78c0:7429-OPENED 301830 0
[3:1][U] 2001:5b0:ffff:501:b883:31f:49e:78c0:7429-OPENED 114268 0
Thread 3: 2 sessions matched filter
vpp# clear session thread 3 session 0
vpp# sh session thread 3 verbose
[3:0][U] 2001:5b0:ffff:501:b883:31f:49e:78c0:7429-OPENED 304282 0
[3:1][U] 2001:5b0:ffff:501:b883:31f:49e:78c0:7429-OPENED 114644 0
Thread 3: 2 sessions matched filter
vpp#
Could anyone suggest if something else can be done to debug this through
vppctl other than possibly loading a debug build with traces enabled?
Thank you for your help.
Regards,
Rushi
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