On Sun, Jul 12, 2009 at 12:54 AM, Graham
Dumpleton<[email protected]> wrote:
>
> 2009/7/10 Mike McGrath <[email protected]>:
>>
>> On Fri, Jul 10, 2009 at 5:17 AM, Graham
>> Dumpleton<[email protected]> wrote:
>>>
>>>
>>> A final thought though, if you are seeing 500 error responses, that
>>> would indicate that a request is still in the process of being handled
>>> when this problem occurs. This would mean that process shutdown or
>>> inactivity-timeout can't really be triggering, unless you actually had
>>> a single request that blocked for the timeout period and no other
>>> requests arrived in that time. If this did occur, then would also
>>> expect to see a 'Premature end of script headers' error message in
>>> logs and you have said anything about that.
>>>
>>
>> One other thing I thought I'd ask about is how shutdown-timeout
>> behaves. If a shutdown gets triggered, will apache stop sending
>> requests to that process immediately or will it wait until after it
>> actually dies?
>
> It isn't that Apache stops sending the requests, but that the process
> stops accepting any new ones. Thus, if using such a long shutdown
> timeout, is wise to run more than one process in the daemon process
> group so that have chance there is another process in the daemon
> process group still running that can accept requests while the first
> in shutting down and restarting.
>
>> Also, what happens to a process if it's been told to
>> shut down, but takes longer then the shutdown-timeout, is there
>> anything that would show up in the logs?
>
> It will be killed off at end of shutdown timeout period. In the logs
> you will see a message containing 'Aborting process'.
>
Just an FYI, moving to 1 thread / process has helped greatly. We've
still seen a 500 or two in the last few days, but nothing like we were
before so it's likely related to something else. (We were seeing 500s
a few times to several times an hour)
-Mike
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