Hi,

Upgrading to latest version of mod_jk solves the problem. As I said
before, this on Windows 2003 Server running both httpd (2.0.59) and
tomcat (6.0.13) on the same machine. We upgraded all production
machines this morning.

Problem is in mod_jk 1.2.22 and is at least and fixed in 1.2.27. We
did not do any other fixes to the environment when upgrading mod_jk.

Hopefully this will help other people experiencing the same problem.

/Jakob


On Wed, Nov 12, 2008 at 9:29 PM, Jakob Ericsson
<[EMAIL PROTECTED]> wrote:
> On Wed, Nov 12, 2008 at 12:21 PM, Rainer Jung <[EMAIL PROTECTED]> wrote:
>> Jakob Ericsson schrieb:
>>>
>>>
>>> --
>>> Jakob Ericsson
>>> +46 704 533 627
>>>
>>> 11 nov 2008 kl. 22.37 skrev Christopher Schultz
>>> <[EMAIL PROTECTED]>:
>>>
>>> Jakob,
>>>
>>> Jakob Ericsson wrote:
>>>>>> We are also experiencing this problem.
>>>>>> Our setup is running Windows 2003 Server with Apache 2.0.59 (no
>>>>>> prefork),
>>>>>> mod_jk 1.2.22 and Apache Tomcat/6.0.13.
>>>>>>
>>>>>> Will upgrading to latest mod_proxy_ajp in Apache httpd 2.2.X solve this
>>>>>> problem?
>>>
>>> If you're willing to donate some time to this, please stick with mod_jk
>>> and work with Rainer/Mladen to fix whatever might be wrong. Upgrading to
>>> the latest mod_jk is a definite requirement before you continue testing.
>>>
>>>> We are in the process of updating our system to the latest mod_jk. I
>>>> will give an update if this solves our problem.
>>>> The underlying problem is hopefully the missed multi thread flag in
>>>> mod_jk compile.
>>>> Does anyone know which issue this is in bugzilla?
>>
>> On Woindows I would not expext that to be the problem. mod_jk tries to
>> determine automatically during compile time, whether a multi-threaded
>> environment gets used and then enables thread safe mutexes.
>>
>> On some more exotic platforms like AIX this determination was broken for
>> some time, so some versions ago we decided to compile thread-safe by
>> default and add a new flag to configure to allow compiling without
>> thread support if you give the flag explicitely.
>>
>> On Windows it should have been always thread safe.
>>
>
> We have updated a couple of our machines in the production environment
> to 1.2.27 and it looks quite good.
>
> Tomorrow, we will upgrade all machines and hopefully the problem will
> disappear. I´ll keep you posted.
>
>> Nevertheless I appreciate you update first. In case you can reproduce
>> the behaviour, it would be extremely helpful to have a JK log file with
>> debug log level. Unfortunately that is a problem for production because
>> of the high log volume. So if you can reproduce it easily, or when only
>> reproducibale under load othen on a test system, a debug level JK log
>> would be extremely helpful. You can make that available also only privately.
>>
> We have tried to replicate the problem in a test environment but all
> attempts have been unsuccessful.
> As you probably understand, we can not enable debug log in the
> production environment.
>
> The thing we see is basically the same as people have said in this
> thread before. First request's response is served to the second
> request's response. :-)
> And it only happens when it is one the same thread in tomcat.
>> I took your mail as a reminder to ask Tim Redding again for his log but
>> did not yet get any response.
>>
>> Regards,
>>
>> Rainer
>>
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>
>
>
> --
> Jakob Ericsson, JAKERI AB
> Tel. +46 704 533 627
>

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