Binod.Pg wrote:
>
> Guillaume Bilodeau wrote:
>> Binod.Pg wrote:
>>
>>> Guillaume Bilodeau wrote:
>>>
>>>> Hi guys,
>>>>
>>>> We are experiencing some problems with our Glassfish server in
>>>> production.
>>>> The two applications that are installed, one WAR-packaged and another
>>>> EAR-packaged, sometimes stop responding at the same time for 10-15
>>>> minutes
>>>> and for no apparent reason, then start accepting requests again as if
>>>> nothing had happened. While both applications are stuck, the Glassfish
>>>> administration console works perfectly (correctly with no performance
>>>> degradation) and shows that both applications are installed and
>>>> enabled.
>>>>
>>>> The logs contain nothing suspicious - just normal application
>>>> exceptions
>>>> that seem to be handled correctly. Accessing the applications from the
>>>> application server itself using a http://localhost address gives the
>>>> same
>>>> results.
>>>>
>>>> The production server is running Windows 2000, Java 5 update 10, and
>>>> Sun
>>>> Java Application Server 9.0.0 PE update 1. I don't know if a firewall
>>>> is
>>>> running or not. Applications are running on port 9090 (normal HTTP,
>>>> not
>>>> secured) and the administrative console on 4848.
>>>>
>>>> Does anybody have any idea how to diagnose this problem and, hopefully,
>>>> to
>>>> solve it?
>>>>
>>>> Thanks a lot,
>>>> GB
>>>>
>>>>
>>>>
>>> http://weblogs.java.net/blog/binod/archive/2006/12/glassfish_and_w.html
>>> Do you know if you are hitting any firewall related issues mentioned in
>>> the above blog?
>>>
>>> - Binod.
>>>
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>>>
>>>
>>>
>>
>> Hi Binod,
>>
>> I found your blog entry when researching this problem - that's actually
>> why
>> I tried accessing the application using a localhost URL, but with no
>> success. Anyway I doubt that there is any firewall running on this
>> server,
>>
> Can you reconfirm that firewall settings are proper? Well, the localhost
> access was
> possible because of the particular setting we had in that machine. In
> reality, the actual
> setup may be different than what is described in the blog.
>> it's inside the DMZ and accessible only through the intranet.
>>
>> In the meantime I did find out that the Thread Count setting in the
>> AppServer > Configuration > HTTP Service > Request Processing tab had a
>> value of only 5 with an Initial Thread Count of 2 and a Thread Increment
>> of
>> 1. Sounds like this could be the cause of our problem, am I right?
>>
> Depends on the usage pattern on the website. If it is not a heavily
> loaded system, the
> current settings should be enough.
>
> Can you take a thread dump and see, if any thread is blocked anywhere?
> - Binod.
>> GB
>
Hi and thanks again for your help and time!
So I confirm that there is no firewall running on this system. There is an
instance of Norton Antivirus, but nothing else. The server seems to be
dedicated to running Glassfish.
The problem hasn't reoccurred since raising the HTTP processing threads -
but I think it's too early to tell if that was really the source of it.
We're experiencing loads between 10 and 150 simultaneous users, with a usual
load of 50. Could 5 HTTP processing threads really handle this? Why is the
default number of threads 128 then?
Thanks,
GB
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