<p dir="ltr">Let me get home and I will post releases I have. Checkout I hold about 10 FreeSWITCH using MySQL as a backbend without issues</p>
<div class="gmail_quote">Le 6 avr. 2016 6:35 PM, "Steven Ayre" <<a href="mailto:steveayre@gmail.com">steveayre@gmail.com</a>> a écrit :<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">It's within the MyODBC driver and not within the libmysqlclient library which means the driver is not thread-safe even if you're using libmysqlclient_r. Incidentally in recent versions libmysqlclient is thread-safe and libmysqlclient_r is just a symlink to libmysqlclient.</div><div class="gmail_extra"><br><div class="gmail_quote">On 6 April 2016 at 17:20, Michael Jerris <span dir="ltr"><<a href="mailto:mike@jerris.com" target="_blank">mike@jerris.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word">This sounds like a bug in the mysql driver then right? If those are not threadsafe then the driver should protect against use where it is not safe.<div><br><div><div><blockquote type="cite"><div><div><div>On Apr 6, 2016, at 5:44 AM, Steven Ayre <<a href="mailto:steveayre@gmail.com" target="_blank">steveayre@gmail.com</a>> wrote:</div><br></div></div><div><div><div><div dir="ltr">I've been doing some debugging on this this week as we're currently seeing regular crashes on our production servers. This happens with both Threading=0 and Threading=2.<div><br></div><div>It appears it's a bug in MyODBC triggered because FreeSWITCH uses a new ODBC environment handle every time it creates a connection.</div><div><br></div><div>When a environment handle is created myodbc_init is called and when it's freed it calls myodbc_end. Those functions are not thread-safe. They're protected by a reference counter but they aren't wrapped in a mutex so if the server is busy and they're both called at the same time you can result in some global variables being used after they're freed.</div><div><br></div><div>Rebuilding MyODBC with an empty myodbc_end appears to stop the crashes, but I'm not saying that's a good solution. Still looking at it.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On 22 November 2013 at 20:31, Anthony Minessale <span dir="ltr"><<a href="mailto:anthony.minessale@gmail.com" target="_blank">anthony.minessale@gmail.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">I've always seen Threading=0 as the solution to stability probs.<div>Basically if the driver already uses mutexing, its better to disable the arbitrary ones in the core of odbc.</div><div>For postgres 0 is basically mandatory.</div>
<div><br></div></div><div class="gmail_extra"><div><div><br><br><div class="gmail_quote">On Fri, Nov 22, 2013 at 2:12 AM, Steven Ayre <span dir="ltr"><<a href="mailto:steveayre@gmail.com" target="_blank">steveayre@gmail.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">No such thing in the latest versions, they're all threadsafe now (_r is a symlink to the other).<div>
<br></div><div>I use it with success. I did find stability problems in libmyodbc when upgrading from 5.0 to 5.5. My solution was to add these to odbc.ini</div>
<div><br></div><div><div>Option = 67108864</div></div><div>Threading = 2<br></div><div><br></div><div>The Threading setting is what stopped the crashes. There's a Jira on the subject and someone else said manually upgrading to a newer version of unixodbc+myodbc also fixed it.</div>
<div><br></div><div>-Steve</div><div><br></div></div><div><div><div class="gmail_extra"><br><br><div class="gmail_quote">On 21 November 2013 18:23, Jeff Leung <span dir="ltr"><<a href="mailto:jleung@v10networks.ca" target="_blank">jleung@v10networks.ca</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Try the non-thread safe MySQL library instead of the thread safe one. <u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><div style="border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt">
<div><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in"><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> <a href="mailto:freeswitch-users-bounces@lists.freeswitch.org" target="_blank">freeswitch-users-bounces@lists.freeswitch.org</a> [mailto:<a href="mailto:freeswitch-users-bounces@lists.freeswitch.org" target="_blank">freeswitch-users-bounces@lists.freeswitch.org</a>] <b>On Behalf Of </b>Vik Killa<br>
<b>Sent:</b> Thursday, November 21, 2013 10:22 AM<br><b>To:</b> FreeSWITCH Users Help<br><b>Subject:</b> Re: [Freeswitch-users] Is MySQL OK to use?<u></u><u></u></span></p></div></div><div><div><p class="MsoNormal">
<u></u> <u></u></p><div><p class="MsoNormal">short answer no.<u></u><u></u></p><div><p class="MsoNormal">use postgres<u></u><u></u></p></div></div><div><p class="MsoNormal" style="margin-bottom:12.0pt"><u></u> <u></u></p>
<div><p class="MsoNormal">On Thu, Nov 21, 2013 at 12:41 PM, Alex Lake <<a href="mailto:alex@digitalmail.com" target="_blank">alex@digitalmail.com</a>> wrote:<u></u><u></u></p><p class="MsoNormal">I find these "Error in my_thread_global_end()" messages somewhat<br>
annoying in my fs1.2stable on Ubuntu12.04 box. Is there any advice<br>(other than "don't use MySQL") for how to install it better? Might it be<br>something to do with thread-safe libraries (I'm using libmyodbc_r.so at<br>
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