Important AREDN Patch

Recently the AREDN devs found a memory leak in the Babel source code. A ticket was opened with the upstream project, and a locally-derived patch implemented.

So - if you have a node with 64 MB of RAM that's moderately busy with Babel traffic, it'll run out of memory sooner or later (possibly sooner). If the node has 128 MB of RAM and isn't especially busy you might not ever see the node run out of RAM in between reboots.

What happens when a Linux machine runs out of RAM? Before that happens, the OOM (Out Of Memory)-killer kicks in. It tries to kill off processes that it deems least impactful, but rarely succeeds. So you end up with a misbehaving or non-functional node, only restored by rebooting.

So, consider updating your nodes to the latest nightly build, in order to incorporate the patch for this memory leak.