<div dir="ltr"><div>Can you test whether or not you can reproduce this using the latest 2.5 release (lttng-tools 2.5.4 + lttng-ust 2.5.5)?<br></div><div>Jérémie</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Jul 7, 2015 at 2:23 PM, Dilong Zheng <span dir="ltr"><<a href="mailto:Dilong.Zheng@mitel.com" target="_blank">Dilong.Zheng@mitel.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif">
<p>Hi,<br>
</p>
<br>
I'm using <b>LTTng v2.5.1 - Fumisterie</b>.<br>
<br>
I launched the session daemon manually using: <span style="font-family:"Courier New",monospace">
lttng-sessiond -vvv</span> and attempted to enable my UST events in another terminal (unsuccessfully). I have attached the contents of the sessiond log (please see
<em>sessiondlog.txt</em>). <br>
<br>
Thanks,<br>
<br>
Dilong<br>
<br>
<div style="color:rgb(46,52,54)">
<hr style="display:inline-block;width:98%">
<div dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><span class=""><b>From:</b> <a href="mailto:jeremie.galarneau@gmail.com" target="_blank">jeremie.galarneau@gmail.com</a> <<a href="mailto:jeremie.galarneau@gmail.com" target="_blank">jeremie.galarneau@gmail.com</a>> on behalf of Jérémie Galarneau <<a href="mailto:jeremie.galarneau@efficios.com" target="_blank">jeremie.galarneau@efficios.com</a>><br>
</span><b>Sent:</b> Tuesday, July 7, 2015 1:13 PM<div><div class="h5"><br>
<b>To:</b> Dilong Zheng<br>
<b>Cc:</b> <a href="mailto:lttng-dev@lists.lttng.org" target="_blank">lttng-dev@lists.lttng.org</a><br>
<b>Subject:</b> Re: [lttng-dev] UST Create Channel Failed, Why?</div></div></font>
<div> </div>
</div><div><div class="h5">
<div>
<div dir="ltr">Which release of 2.5 are you using? You can find out using:
<div>$ lttng version</div>
<div><br>
</div>
<div>Can you launch the session daemon manually in verbose-mode and provide the logs?</div>
<div>$ lttng-sessiond -vvv</div>
<div><br>
</div>
<div>and enable your events in another terminal.</div>
<div><br>
</div>
<div>Thanks,</div>
<div>Jérémie</div>
<div><br>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Tue, Jul 7, 2015 at 11:28 AM, Dilong Zheng <span dir="ltr">
<<a href="mailto:Dilong.Zheng@mitel.com" target="_blank">Dilong.Zheng@mitel.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif">
<p>Hi Jeremie,</p>
<p><br>
</p>
<p>Had some grammatical mistakes in my last email.... this should be clearer.<br>
</p>
<p><br>
</p>
<p>I am using LTTng v2.5. I am not explicitly creating any channels. I am only creating a session via:
<span style="font-family:"Courier New",monospace">lttng create [session-name]</span> . I used to always just create a session and then enable whichever available user tracepoint that I need (without explicitly creating any channels).</p>
<p><br>
</p>
<p>Thanks,</p>
<p><br>
</p>
<p>Dilong<br style="font-family:"Courier New",monospace">
</p>
<br>
<br>
<div style="color:rgb(46,52,54)">
<hr style="display:inline-block;width:98%">
<div dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b> Dilong Zheng<br>
<b>Sent:</b> Tuesday, July 7, 2015 11:26 AM<br>
<b>To:</b> Jérémie Galarneau
<div>
<div><br>
<b>Cc:</b> <a href="mailto:lttng-dev@lists.lttng.org" target="_blank">lttng-dev@lists.lttng.org</a><br>
<b>Subject:</b> Re: [lttng-dev] UST Create Channel Failed, Why?</div>
</div>
</font>
<div> </div>
</div>
<div>
<div>
<div>
<div style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif">
<p>Hi Jeremie,</p>
<p><br>
</p>
<p>I am using LTTng v2.5. I am not explicitly creating channels. I am only creating a session:
<span style="font-family:"Courier New",monospace">lttng create [session-name]</span> . It used to always just create a session and then enable whichever available user tracepoint that I need (which out explicitly creating any channels).</p>
<p><br>
</p>
<p>Thanks,</p>
<p><br>
</p>
<p>Dilong<br style="font-family:"Courier New",monospace">
</p>
<br>
<div style="color:rgb(46,52,54)">
<hr style="display:inline-block;width:98%">
<div dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b>
<a href="mailto:jeremie.galarneau@gmail.com" target="_blank">jeremie.galarneau@gmail.com</a> <<a href="mailto:jeremie.galarneau@gmail.com" target="_blank">jeremie.galarneau@gmail.com</a>> on behalf of Jérémie Galarneau <<a href="mailto:jeremie.galarneau@efficios.com" target="_blank">jeremie.galarneau@efficios.com</a>><br>
<b>Sent:</b> Tuesday, July 7, 2015 11:20 AM<br>
<b>To:</b> Dilong Zheng<br>
<b>Cc:</b> <a href="mailto:lttng-dev@lists.lttng.org" target="_blank">lttng-dev@lists.lttng.org</a><br>
<b>Subject:</b> Re: [lttng-dev] UST Create Channel Failed, Why?</font>
<div> </div>
</div>
<div>
<div dir="ltr">Hi Dilong,
<div><br>
</div>
<div>How do you create this channel and using which version of LTTng?</div>
<div><br>
</div>
<div>Jérémie</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Mon, Jul 6, 2015 at 2:11 PM, Dilong Zheng <span dir="ltr">
<<a title="Ctrl+Click or tap to follow the link" href="mailto:Dilong.Zheng@mitel.com" target="_blank">Dilong.Zheng@mitel.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif">
<p>Hi all,</p>
<p><br>
</p>
<p>While trying to enable UST events, I get the following error message:</p>
<p><br>
</p>
<p><span style="font-family:"Courier New",monospace">Error: Event mitel:sem_wait_entry: UST create channel failed (channel channel0, session mcdUST3)</span></p>
<p><br>
</p>
<p>When I type: <span style="font-family:"Courier New",monospace"></span><span style="font-family:"Courier New",monospace">lttng list -u</span>
<span style="font-family:Calibri,Arial,Helvetica,sans-serif">I am able to see a list of all my UST tracepoints.</span><br>
</p>
<p>Could someone please provide some insight as to why this error is appearing and steps I could take to fix this error. Thanks.</p>
<p><br>
</p>
<p><br>
<br>
</p>
</div>
</div>
<br>
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<br>
</blockquote>
</div>
<br>
<br clear="all">
<div><br>
</div>
-- <br>
<div>Jérémie Galarneau<br>
EfficiOS Inc.<br>
<a href="http://www.efficios.com" target="_blank">http://www.efficios.com</a></div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<br>
<br clear="all">
<div><br>
</div>
-- <br>
<div>Jérémie Galarneau<br>
EfficiOS Inc.<br>
<a href="http://www.efficios.com" target="_blank">http://www.efficios.com</a></div>
</div>
</div>
</div></div></div>
</div>
</div>
</blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature">Jérémie Galarneau<br>EfficiOS Inc.<br><a href="http://www.efficios.com" target="_blank">http://www.efficios.com</a></div>
</div>