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Mark,

On 4/18/13 6:30 PM, Mark Thomas wrote:
> On 18/04/2013 22:58, Christopher Schultz wrote:
>> So, this is my due diligence to determine if, in addition to the
>>  mountain of evidence we otherwise have, Tomcat does in fact log
>>  requests in the order in which they are received.
> 
> Tomcat logs requests in the order they complete (so it can log the
>  time spent processing, bytes sent, etc.).
> 
> Additionally, there is a sync block around the writing to the log 
> which is not guaranteed to use fair ordering so it is possible in a
> busy server for request A to finish before request B but for 
> request B to be logged first. If those requests are on the same 
> connection then they will always be logged in the order they were 
> made.

Okay, that definitely does help: this server is /not/ highly-loaded
(those two examples I showed were the only requests received during
that particular second of the day) and having request B complete
before request A completes (especially when they are roughly
equivalent in terms of time-to-complete at ~200ms each) clearly shows
that the client is /not/ waiting for request A to complete before
submitting request B.

Thanks,
- -chris
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