[lttng-dev] lttng has No session daemon is available

Amit Margalit AMITM at il.ibm.com
Sun Apr 6 08:19:32 EDT 2014

The sessiond take a short while to become ready.

If you are running a script, I recommend using '-d' or '-b' to 
lttng-sessiond, instead of using "&".

Then, you need to wait for it to be ready, which can be done simply by a 
short sleep, or using signals (look at --sig-parent commandline argument).

The reason you are seeing the error is that you are running lttng create 
before the sessiond is really ready.


Amit Margalit
IBM XIV - Storage Reinvented
XIV-NAS Development Team
Tel. 03-689-7774
Fax. 03-689-7230

From:   loody <miloody at gmail.com>
To:     lttng-dev at lists.lttng.org
Date:   04/06/2014 03:07 PM
Subject:        [lttng-dev] lttng has No session daemon is available

hi all:
I cross compile below elements for arm successfully.
1. userspace-rcu-0.8.4
2. popt-1.16
3. lttng-ust-2.3.2
4. lttng-tools-2.3.2
5. lttng-modules-2.4.0

I follow execution steps:
1. lttng-sessiond -vvv &
2. ps (to check whether lttng-sessiond execute successfully)
3. lttng -vvv create /mtd_unirw/testsession, where "
/mtd_unirw/testsession" is rw area of my rootfs to save sessions

I met bellow messages
No session daemon is available

when I am checking the debug message when running lttng-sessiond, I
cannot find any error message.
And from ps, lttng-sessiond is running good.
(I attach my log for your reference)

did I miss any setting or should I open more debug message to find out
where I am wrong?

appreciate your kind help in advance,
[attachment "lttng.log" deleted by Amit Margalit/Israel/IBM] 
lttng-dev mailing list
lttng-dev at lists.lttng.org

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.lttng.org/pipermail/lttng-dev/attachments/20140406/e14b4048/attachment-0001.html>

More information about the lttng-dev mailing list