EC2 AMI Linux Agent only runs 1 test, then disappears

[Roamer]

Just a bit more info, I've just seen that after running a test successfully, the agent appears as an "Idle Agent" for a very short period of time, then disappear and the number of Idle agents goes to zero.

Also, just noticed that tmp/ec2_instances.dat STILL shows:

$ more ec2-instances.dat
{"ami-a3a81dd0":{"count":1},"ami-a600d6df":{"count":1}}

... even though there are ZERO running agent instances :-S

-John.