Hi Everyone!
My client application use vapi to connect to vpp.
When vpp restarts, my application gets stuck at the vapi call.
When I also restart my application, everything becomes normal.
*I guess this is due to a broken connection.*
Is there a way to reconnect without restarting my application? Any clues are
greatly appreciated.
vpp version: v20.01 master branch.
The debug stack is as follows:
Thread 2 "agent" hit Breakpoint 1, CVapiClient::SetIpfixExporter (this=0x6e5be0
<CHttpServer::m_vapiClient>, srcAddr="10.10.0.1", colAddr="10.10.0.10",
tmpInterval=20, port=8877,
mtu=1450) at vapiclient/vapiclient.cpp:219
219 if (VAPI_OK != (rv = vapi_set_ipfix_exporter(ctx, sv,
sw_interface__set_ipfix_cb, &called)))
(gdb) s
vapi_set_ipfix_exporter (ctx=0x7676c0, msg=0x1300883a0, callback=0x4a0a62
<sw_interface__set_ipfix_cb(vapi_ctx_s*, void*, vapi_error_e, bool,
vapi_payload_set_ipfix_exporter_reply*)>,
callback_ctx=0x7ffff0a8c960) at
/data/kans/archives/ntc/vpp/build-root/install-vpp-native/vpp/include/vapi/ipfix_export.api.vapi.h:951
951 if (!msg || !callback) {
(gdb) n
954 if (vapi_is_nonblocking(ctx) && vapi_requests_full(ctx)) {
(gdb)
958 if (VAPI_OK != (rv = vapi_producer_lock (ctx))) {
(gdb)
961 u32 req_context = vapi_gen_req_context(ctx);
(gdb)
962 msg->header.context = req_context;
(gdb)
963 vapi_msg_set_ipfix_exporter_hton(msg);
(gdb)
964 if (VAPI_OK == (rv = vapi_send (ctx, msg))) {
(gdb)
965 vapi_store_request(ctx, req_context, false, (vapi_cb_t)callback,
callback_ctx);
(gdb)
966 if (VAPI_OK != vapi_producer_unlock (ctx)) {
(gdb)
969 if (vapi_is_nonblocking(ctx)) {
(gdb)
972 rv = vapi_dispatch(ctx);
(gdb) s
vapi_dispatch (ctx=0x7676c0) at
/data/kans/archives/ntc/vpp/src/vpp-api/vapi/vapi.c:815
815 vapi_error_e rv = VAPI_OK;
(gdb) n
816 while (!vapi_requests_empty (ctx))
(gdb)
818 rv = vapi_dispatch_one (ctx);
(gdb) s
vapi_dispatch_one (ctx=0x7676c0) at
/data/kans/archives/ntc/vpp/src/vpp-api/vapi/vapi.c:761
761 vapi_error_e rv = vapi_recv (ctx, &msg, &size, SVM_Q_WAIT, 0);
(gdb) s
vapi_recv (ctx=0x7676c0, msg=0x7ffff0a8c888, msg_size=0x7ffff0a8c890,
cond=SVM_Q_WAIT, time=0) at
/data/kans/archives/ntc/vpp/src/vpp-api/vapi/vapi.c:538
538 if (!ctx || !ctx->connected || !msg || !msg_size)
(gdb) n
542 vapi_error_e rv = VAPI_OK;
(gdb) n
543 api_main_t *am = vlibapi_get_main ();
(gdb) n
546 if (am->our_pid == 0)
(gdb) n
551 svm_queue_t *q = am->vl_input_queue;
(gdb) n
555 int tmp = svm_queue_sub (q, (u8 *) & data, cond, time);
(gdb) s
svm_queue_sub (q=0x1301caa00, elem=0x7ffff0a8c828 "", cond=SVM_Q_WAIT, time=0)
at /data/kans/archives/ntc/vpp/src/svm/queue.c:360
360 int need_broadcast = 0;
(gdb) n
361 int rc = 0;
(gdb) n
363 if (cond == SVM_Q_NOWAIT)
(gdb) n
372 svm_queue_lock (q);
(gdb) p cond
$17 = SVM_Q_WAIT
(gdb) n
374 if (PREDICT_FALSE (q->cursize == 0))
(gdb) p *q
$18 = {mutex = {__data = {__lock = 1, __count = 0, __owner = 16263, __nusers =
2, __kind = 128, __spins = 0, __elision = 0, __list = {__prev = 0x0, __next =
0x0}},
__size = "\001\000\000\000\000\000\000\000\207?\000\000\002\000\000\000\200",
'\000' <repeats 22 times>, __align = 1}, condvar = {__data = {__lock = 0,
__futex = 1, __total_seq = 1,
__wakeup_seq = 0, __woken_seq = 0, __mutex = 0xffffffffffffffff, __nwaiters =
2, __broadcast_seq = 0},
__size = "\000\000\000\000\001\000\000\000\001", '\000' <repeats 23 times>,
"\377\377\377\377\377\377\377\377\002\000\000\000\000\000\000", __align =
4294967296}, head = 1,
tail = 1, cursize = 0, maxsize = 32, elsize = 8, consumer_pid = 16262,
producer_evtfd = -1, consumer_evtfd = -1, data = 0x1301caa78
"\310\305\004\060\001"}
(gdb) n
376 if (cond == SVM_Q_NOWAIT)
(gdb) n
381 else if (cond == SVM_Q_TIMEDWAIT)
(gdb) n
394 while (q->cursize == 0)
(gdb) p q->cursize
$19 = 0
(gdb) n
*395 svm_queue_wait_inline (q); // stuck here*
(gdb) n
Best Regeards,
Xiaopeng
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