<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Feb 20, 2017 at 7:13 AM, Dridi Boukelmoune <span dir="ltr"><<a href="mailto:dridi@varni.sh" target="_blank">dridi@varni.sh</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span class="gmail-">On Mon, Feb 20, 2017 at 1:09 PM, Andrei <<a href="mailto:lagged@gmail.com">lagged@gmail.com</a>> wrote:<br>
> Hi Dridi,<br>
><br>
> Thanks for the input. Looking over the panic I initially linked, the exact<br>
> version info was:<br>
><br>
> version = varnish-4.1.4 revision 4529ff7 ident =<br>
> Linux,2.6.32-642.6.2.el6.x86_<wbr>64,x86_64,-junix,-smalloc,-<wbr>smalloc,-hcritbit,epoll<br>
<br>
</span>Yes, I definitely need to get the hang of this "reading" thing.<br></blockquote><div> </div><div>It's overrated :)</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<span class="gmail-"><br>
> I had already upgraded to 4.1.5 before mentioning the error on the list, and<br>
> it's been smooth since. It was just odd that there were no clock changes,<br>
> yet it panicked due to a stepping, so I figured I'd bring it up.<br>
<br>
</span>There's a bug I don't remember and couldn't find after a quick search.<br>
But basically it would cause the child to not restart after a panic.<br>
<br>
Something like:<br>
<br>
- panic (child crashed)<br>
- restart<br>
- CLI timeout during restart<br>
- kill the child<br>
- varnish running without a cache process<br>
<br>
The last step is similar to the one you ran into, since you couldn't<br>
list backends via the CLI. But I couldn't find this bug after a quick<br>
search and looking at the changelog I don't see anything related. So I<br>
would say you may end up in the same situation even with the latest<br>
4.1 release. You should collect syslogs (enabled by default) and see<br>
what Varnish has to say shortly before/after a panic, it might give a<br>
clue.<br>
<span class="gmail-HOEnZb"><font color="#888888"><br>
Dridi<br></font></span></blockquote><div><br></div><div>Thanks for the details, I'll track it down from there and keep an eye on the issue(s). Nothing in /var/log/messages other than a ban sent ~6h prior:</div><div><br></div><div>Feb 12 17:09:17 aviator varnishd[15791]: CLI telnet 127.0.0.1 55284 127.0.0.1 6082 Rd auth NNN</div><div>Feb 12 17:09:17 aviator varnishd[15791]: CLI telnet 127.0.0.1 55284 127.0.0.1 6082 Wr 200 -----------------------------#012Varnish Cache CLI 1.0#012-----------------------------#012Linux,2.6.32-642.6.2.el6.x86_64,x86_64,-junix,-smalloc,-smalloc,-hcritbit#012varnish-4.1.4 revision 4529ff7#012#012Type 'help' for command list.#012Type 'quit' to close CLI session.</div><div>Feb 12 17:09:17 aviator varnishd[15791]: CLI telnet 127.0.0.1 55284 127.0.0.1 6082 Rd ping</div><div>Feb 12 17:09:17 aviator varnishd[15791]: CLI telnet 127.0.0.1 55284 127.0.0.1 6082 Wr 200 PONG 1486912157 1.0</div><div>Feb 12 17:09:17 aviator varnishd[15791]: CLI telnet 127.0.0.1 55284 127.0.0.1 6082 Rd ban req.http.Host ~ ".*"</div><div>Feb 12 17:09:17 aviator varnishd[15791]: CLI telnet 127.0.0.1 55284 127.0.0.1 6082 Wr 200 </div><div> </div></div><br></div></div>