[chef] Intermittent chef-expander problem

[Alex Kiernan < >]

We've an intermittent chef-expander problem... every few days it'll
get invalid JSON from rabbitmq, the pattern's always the same, 8
octets of corruption, the last 4 of which are always NUL. If we
restart rabbitmq & chef-expander the problem goes away for a few days,
then comes back... a (heavily snipped) example is:

[Thu, 25 Aug 2011 18:24:48 +0100] ERROR: cannot index object because it is 
inval
id JSON: 
{"action":"add","payload":{"enqueued_at":1314293088,"id":"92a1d57c-4579
-446c-8fda-c3331f8477d9","type":"node","database":"chef","item":{
...............
"dmi":^@<80><9E>
 @
 @{"address":"0xEA2E0","firmware_revision":"0.0",

Any ideas?

This is Chef 0.10.0 on RHEL 5.5

-- 
Alex Kiernan