Hi all,
I am trying to trace the Linux kernel (system calls) using LTTng on a platform that is running OpenWRT. I have cross compiled the latest versions (2.10.x) of the lttng-modules, lttng-tools and lttng-ust packages and installed these on my OpenWRT system. Now when I start a kernel trace then the lttng tool returns the error "LTTng transport relay-metadata not found / Error: Opening metadata failed". Does anybody know what might cause this error, or have a hint on what to check? I have attached the captured output of 'lttng-sessiond -vvv --verbose-consumer'. Here is some more context: . MIPS platform running Linux 3.18.29 . Package versions: o lttng-modules-2.10.4 o lttng-tools-2.10.1 o lttng-ust-2.10.0 . lsmod shows that the following modules have been loaded: o lttng_clock o lttng_lib_ring_buffer o lttng_ring_buffer_client_discard o lttng_statedump o lttng_tracer . Commands to create and start a session: o lttng create o lttng enable-event --kernel --syscall open,close o lttng start When 'lttng start' is called then lttng-sessiond's debug output shows "Closing metadata fd -1 (in trace_kernel_destroy_metadata() at trace-kernel.c:569)" followed by "Sending response (size: 20, retcode: Opening metadata failed (45)) (in thread_manage_clients() at main.c:4641)". I assume that the error that I'm seeing is because for some reason metadata fd is being closed. Does anybody know what may cause this issue, or have a hint on to check? Kind regards, Robin
lttng-sessiond.log
Description: Binary data
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