This may well not be your problem but....
I had similar symtoms once. It turned out to be a bad database
connection pool implementation. After an hour or so the database
would drop inactive connections but the cache of connections in the
pool were 'unaware'. So the first N attempts failed until the
pool was re-initialized.
Regards
Geoff
Greg Barish wrote:
>
> Hi -
>
> I have a few servlets which handle POST requests via the doPost
> handler. Usually, the system is fine. I can POST and get back
> the responses I expect.
>
> Sometimes - usually after a few hours of inactivity - clients
> requesting to execute that POST are returned HTTP 500 errors. This
> happens for the next 4 or so attempted connections, all of those
> connections finishing after 300 ms from the first attempted connection.
>
> To be more clear, I have an automated client program which issues
> several POSTs in succession. Usually, the client and Apache+JServ work
> fine, but after a few hours of inactivity, the next batch of client
> requests will have at least 4 of those requests recieve HTTP 500 errors
> from Apache. The rest of the connections after that are fine - almost
> like Apache (or JServ) "warmed up".
>
> Has anyone else seen this?
>
> So, I'm not sure if the problem is with:
> * Apache
> or
> * JServ availability (and Apache not being able to find it
> results in HTTP 500s)
>
> I noticed that there was an earlier bug report having to do with
> lockups with concurrent requests on Apache 1.3.4, but that was the
> closest thing I saw.
>
> I am running:
> - Apache 1.3.4,
> - JServ 1.0b2
> - WinNT 4.0 Wkstn Svc Pk 4
>
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--
Geoff Smith
SoftSmiths Pty. Ltd.
Server Side Solutions
ACN 056 452 683
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