[lttng-dev] Live streaming question (lttng 2.4.0.rc4)

[anette.schott@ericsson.com (Anette Schött)]

Hi,

I am trying to do live streaming via the lttng-relayd and babeltrace (lttng 2.4.0.rc4). I am running an emulator where
I want to both generate the user-space tracepoints and view them live on the same host (hope this is a valid use case).

I do the following:

# lttng-relayd -d -v -L net://localhost:5344
DEBUG3 [1516/1516]: URI string: net://localhost:5344 (in uri_parse() at uri.c:291)
DEBUG3 [1516/1516]: URI dtype: 1, proto: 1, host: localhost, subdir: , ctrl: 5344, data: 0 (in uri_parse() at uri.c:505)
DEBUG3 [1516/1516]: URI string: tcp://0.0.0.0:5342 (in uri_parse() at uri.c:291)
DEBUG3 [1516/1516]: URI dtype: 1, proto: 1, host: 0.0.0.0, subdir: , ctrl: 5342, data: 0 (in uri_parse() at uri.c:505)
DEBUG3 [1516/1516]: URI string: tcp://0.0.0.0:5343 (in uri_parse() at uri.c:291)
DEBUG3 [1516/1516]: URI dtype: 1, proto: 1, host: 0.0.0.0, subdir: , ctrl: 5343, data: 0 (in uri_parse() at uri.c:505)
DEBUG1 [1516/1516]: Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT (in set_signal_handler() at main.c:435)

# lttng create s1 --live 200000 -U net://localhost:5344
Session s1 created.
Traces will be written in net://localhost:5344

# lttng enable-channel ch1 -u
ERROR [834/838]: recvmsg inet: Connection reset by peer (in lttcomm_recvmsg_inet_sock() at inet.c:376)
Error: Channel ch1: Relay daemon not compatible (session s1)
Warning: Some command(s) went wrong

As all command are executed on the same host, why compatibility issues?

What commands shall I use to set up a live streaming?

Regards
Anette

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