Re: {bb} The bb_rename error problem

[Henrik Storner <henrik-bb@hswn.dk>]

In <41FA6C81.20801@bb4.com> Robert-Andre Croteau <robert@bb4.com> writes:

>brent.mccrackin@bell.ca wrote:
>> Wed Jan 26 08:56:23 2005 bbd bb_rename Could not rename 
>> /bbvar/logs/.somehost.http to /bbvar/logs/somehost.http - errno: 2

>the error occurs because /bbvar/logs/.somehost.http does not exists
>anymore.  The only reason this can happen (from my POV) is that
>another status for the same somehost.http was received and is being
>process concurrently.

>Reasons this can happen ?

>2) Overloaded BB server.  Very slow to process all incoming status
>logs in a timely fashion and actually didn't process that particular
>status in a BBSLEEP cycle.

I agree with this analysis. Does it seem possible that the BB server
cannot proces one status-message before the next status-message for
the same host+test combination arrives ? Yes, it is quite possible.

Brent mentioned in his initial posting that he was using bbgen, and
presumably also the bbgen network tester. There is an extra script
included with bbgen, which triggers a failing network test to be
repeated with 1 minute intervals for the first 30 minutes after a
failure is detected. I don't know if Brent is using this (the
"bbretest-net.sh" extension script), but if he does then the status
messages can arrive much more frequently. I use it, and if we have a
network "blip" (e.g. when a network switch reloads), BB records
outages of 30 seconds. Meaning that the time between the initial
status report and the next was 30 seconds.

Of course the problem gets worse when problems appear, because changes
in status triggers more file updates (history logs) and process
activity (alerts need to be sent) than what you see when everything is
green. So if the BB server is busy enough that processing a message
takes 1 or 2 minutes, this is a very likely reason for this problem.


Henrik
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