[lttng-dev] lttng-tools-2.10.6: Spawning consumerd failed

[veredz72@gmail.com (Zvi Vered)]

Hi Jonathan,

I'm not using buildroot nor Yokto.
In order to build lttng-tools I ran:
./configure --prefix=/64_sw/git/zvi_vered/MY_PROJ/linux4.9.20/boot/rootfs
make
make install

This path contains a complete root file system (based on busybox) that is
later copied to my target.

On the target I ran:
lttng-sessiond -vvv --verbose-consumer
and got:
....
I/O warning : failed to load external entity
"/64_sw/git/zvi_vered/MY_PROJ/linux4.9.20/boot/rootfs/share/xml/lttng/session.xsd"
XML Error: Failed to locate the main schema resource at
'/64_sw/git/zvi_vered/MY_PROJ/linux4.9.20/boot/rootfs/share/xml/lttng/session.xsd'.
Error: XSD parsing failed
Error: Session load failed: Invalid session configuration
DEBUG1 - 00:10:36.746330272 [1476/1618]: Accepting client command ... (in
thread_manage_clients() at main.c:4374)

Then I ran:
lttng create my-kernel-session
and got:
....
DEBUG3 - 00:11:41.869875832 [1628/1628]: Looking for a kernel consumer at
these locations: (in spawn_consumerd() at main.c:2429)
DEBUG3 - 00:11:41.869901726 [1628/1628]:        1) NULL (in
spawn_consumerd() at main.c:2430)
DEBUG3 - 00:11:41.869908520 [1628/1628]:        2)
/64_sw/git/zvi_vered/MY_PROJ/linux4.9.20/boot/rootfs/lib/lttng/libexec/lttng-consumerd
(in spawn_consumerd() at main.c:2431)
DEBUG3 - 00:11:41.869915959 [1628/1628]:        3)
/64_sw/git/zvi_vered/MY_PROJ/linux4.9.20/boot/rootfs/lib/lttng/libexec/lttng-consumerd
(in spawn_consumerd() at main.c:2432)
DEBUG1 - 00:11:41.869971468 [1628/1628]: Could not find any valid consumerd
executable (in spawn_consumerd() at main.c:2444)
Error: Spawning consumerd failed

I double checked: The target has /lib/lttng-libexec/lttng-consumerd
But it looks for it in:
 /64_sw/git/zvi_vered/MY_PROJ/linux4.9.20/boot/rootfs/lib/lttng/libexec ]

What is missing in my configuration ?

Thank you,
Zvika

On Tue, May 14, 2019 at 9:04 PM Jonathan Rajotte-Julien <
jonathan.rajotte-julien at efficios.com> wrote:

> >
> > >
> > >
> > > I'm running under a 32 bit (x86) vanilla, 4.9.20 kernel with busybox
> > > with the following lttng versions:
>
> I took some time to at least test on a 32 bit system (buildroot) just in
> case
> and everything seems to be working fine on a base installation.
>
> The log from lttng-sessiond should provides more information on why we
> fail to
> spawn the consumerd (wrong path, etc.).
>
> Cheers
>
> --
> Jonathan Rajotte-Julien
> EfficiOS
>
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