[lttng-dev] Lttng not producing trace files

[Corbin, Craig]

I am running lttng on an arm board. I am having an issue when tracing the kernel, i don't have any trace file. I do notice i have a bunch of Unknown symbol outputs when spawning the session deamon. But if i run lttng create again i don't see these messages pop up. But the main issue is that if i do
#lttng create
#lttng enable-event --kernel --syscall --all
#lttng start
#lttng stop
I don't have anything in my trace session folder. I expected to see the trace file being dumped here after lttng stop.
Below is what i get the first time i run lttng create
# lttng create
Spawning a session daemon
[   74.874182] lttng_ring_buffer_client_discard: Unknown symbol lib_ring_buffer_release_read (err 0)
[   74.883131] lttng_ring_buffer_client_discard: Unknown symbol channel_get_ring_buffer (err 0)
[   74.891602] lttng_ring_buffer_client_discard: Unknown symbol lttng_transport_unregister (err 0)
[   74.900336] lttng_ring_buffer_client_discard: Unknown symbol channel_destroy (err 0)
[   74.908116] lttng_ring_buffer_client_discard: Unknown symbol _lib_ring_buffer_memset (err 0)
[   74.916584] lttng_ring_buffer_client_discard: Unknown symbol _lib_ring_buffer_write (err 0)
[   74.924967] lttng_ring_buffer_client_discard: Unknown symbol lib_ring_buffer_offset_address (err 0)
[   74.934049] lttng_ring_buffer_client_discard: Unknown symbol _lib_ring_buffer_strcpy_from_user_inatomic (err 0)
[   74.944188] lttng_ring_buffer_client_discard: Unknown symbol lib_ring_buffer_reserve_slow (err 0)
[   74.953104] lttng_ring_buffer_client_discard: Unknown symbol lttng_last_tsc (err 0)
[   74.960790] lttng_ring_buffer_client_discard: Unknown symbol _lib_ring_buffer_strcpy (err 0)
[   74.969261] lttng_ring_buffer_client_discard: Unknown symbol lib_ring_buffer_read_offset_address (err 0)
[   74.978773] lttng_ring_buffer_client_discard: Unknown symbol _lib_ring_buffer_copy_from_user_inatomic (err 0)
[   74.988724] lttng_ring_buffer_client_discard: Unknown symbol lib_ring_buffer_nesting (err 0)
[   74.997202] lttng_ring_buffer_client_discard: Unknown symbol lttng_transport_register (err 0)
[   75.005761] lttng_ring_buffer_client_discard: Unknown symbol lttng_trace_clock (err 0)
[   75.013709] lttng_ring_buffer_client_discard: Unknown symbol lib_ring_buffer_open_read (err 0)
[   75.022343] lttng_ring_buffer_client_discard: Unknown symbol channel_create (err 0)
Session auto-19700101-000114 created.
Traces will be written in //lttng-traces/auto-19700101-000114

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