> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
>
> Qinxue Chen <[EMAIL PROTECTED]> wrote:
> > The problem seems to be that the new request has the same
> request ID,
> > request code, source IP, source port, but different vectors
> (what's this?)
>
> It means that the request is a new one, and different from the first
> on.
>
> The RFC's specifically allow for this.
>
> > as one of the old requests. From the problem I saw, it is
> not caused by the
> > NAS end. The freeradius didn't clear some old requests
> properly in the
> > buffer for whatever reasons. Some request IDs stayed for
> about several
> > hours. I am not quiet sure about the whole process in the
> software. If Alan
> > or Chris could explain a little bit, it will be greatly appreciated.
>
> There's not much to say. It looks like the server has a bug.
>
But in the software, the new requests are dropped. Yesterday I modified the
code (radiusd.c) a little. The whole else block for the error part was got
rid of. That means the new request would be added and processed. I run it
the whole night without problems. I only worried about possible memory leak.
I believed that some old requests were still in the request data. From my
tests with the change, memory usage was fine on the box.
The way to solve the problem cleanly is to identify two cases: 1) old
requests stayed for a long time in the request data. 2) server is not fast
enough to handle a request and a new request with the same id/code/ip/port
comes in. Case 1) can be caused by whatever reasons like threads die. For
case 1), a new request can replace the old one in the request data. For my
tests, all problems fall in case 1). For case 2), the possible solutions: a.
drop the new request b. use new request to replace the old request. From the
performance view, there is no difference between the two solutions. Then
for both case 1) and 2), we can do the same thing: replace the old request
with the new one. What do you think?
--Qinxue Chen
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