Matthias,<br><br>When 2.8.2 rolled, we also got snagged by this. It was actually a bit of a mess for us. Like a lot of companies, we are lean on administrators (500+ servers per administrator) and fast moving. Rabbit is newer in our infrastructure but its been really stable, so we had classified it as "production safe" for both the application and its packaging. In our case, we've re-classified the packaging as "development" meaning that when a new version rolls, it has to be manually upgraded (sent through the QA process to test for this sort of breakage.)<br>
<br>Its getting more and more common for our machines to have large memory spaces, and more and more common that applications run almost entirely out of memory. My guess is that others see the same trend upwards in memory size... so this is probably something you'll continue to have more issues with rather than less. Given that trend, I'd recommend that the packaging check for this state (if upgrading from <2.8.2) and fail the upgrade if the appropriate values aren't set (i.e. you'll end up with a failed Rabbit at the end of the upgrade.) For people starting with 2.8.2+, you might consider re-visiting the hard failure and making this a warning state instead... seems to me there's a valid argument to throw a warning here rather than blocking (however, I could be entirely incorrect about that.)<br>
<br><div class="gmail_quote">On Mon, Jun 18, 2012 at 4:08 PM, Matthias Radestock <span dir="ltr"><<a href="mailto:matthias@rabbitmq.com" target="_blank">matthias@rabbitmq.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On 18/06/12 20:22, Philip K. Warren wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
We have encountered issues in RabbitMQ 2.8.2 and greater with the<br>
default 'disk_free_limit' monitoring. If you are running on a system<br>
with more available RAM than disk space out of the box, RabbitMQ will<br>
block consumers in its default configuration.<br>
</blockquote>
<br>
We are surprised by how many people get caught out by that.<br>
<br>
Are there perhaps some popular Amazon EC2 images that are configured with very little disk space in /var/lib?<br>
<br>
Matthias.<br>
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