I wrote:
In the past few weeks, we've been seeing the "Loss of session data" error message in our wiki frequently when users try to save their edited articles (and the save fails)....
We found the problem and it's worth documenting.
*One* of our memcached servers was missing an entry for itself in /etc/hosts. This meant that this one server could not connect to memcached on localhost. Since we have multiple memcached servers, the error was intermittent. Adding an IPv4 entry for the server in the bad /etc/hosts file solved the problem.
DanB
Heh. That's why Wikimedia configuration mostly uses IPs. :)
On Tue, Jun 24, 2014 at 9:25 AM, Daniel Barrett danb@vistaprint.com wrote:
I wrote:
In the past few weeks, we've been seeing the "Loss of session data" error
message in our
wiki frequently when users try to save their edited articles (and the
save fails)....
We found the problem and it's worth documenting.
*One* of our memcached servers was missing an entry for itself in /etc/hosts. This meant that this one server could not connect to memcached on localhost. Since we have multiple memcached servers, the error was intermittent. Adding an IPv4 entry for the server in the bad /etc/hosts file solved the problem.
DanB
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