Begin forwarded message:
> From: Orphee Sandjo <o.sandjo@...>
> Date: 29. April 2010 10:35:30 MESZ
> To: dfrolov@...
> Subject: Re: [Wonder-disc] Processes waiting on state CLOSE_WAIT
>
> Denis, you are scaring me. "Deadlock" is definitely not the word i
> want to hear
> for the moment, since we really took our time to integrate wonder in
> our application
> and trust the framework. So I hope not. Do you use wonder ?
>
> On 29.04.2010, at 10:27, Denis Frolov wrote:
>
>> We have a script on server that tracks the number of CLOSE_WAITs per
>> instance and restarts an instance if this number is above the
>> threshold. I'm not an expert in TCP/IP stack but we do see
>> CLOSE_WAITs
>> for requests that are waiting to enter RRL of an instance that is
>> busy
>> with some long running task or is stuck on a deadlock.
>>
>> On Thu, Apr 29, 2010 at 12:22 PM, Orphee Sandjo
>> <o.sandjo@...> wrote:
>>>>> Which version of WebObjects are you using. I think that WO 5.2
>>>>> had a
>>>>> bug that caused that exact problem.
>>>>>
>>>>> Chuck
>>>
>>> Chuck, I use WO Version 5.4.3. So if they fixed it in 5.2, then I
>>> will
>>> have
>>> to figure that out myself and I have no clue how to start because
>>> it is
>>> such an erratic behavior ... ;-(
>>>
>>>
>>>> Another possible reason is that instances are busy processing
>>>> requests
>>>> (e.g. waiting on a database lock). You'd probably want to make a
>>>> stack
>>>> traces dump to check this.
>>>
>>>
>>> Might be possible, since we do have some longresponsepages in our
>>> application
>>> that hit the database and then generate some graphics. I will try
>>> with a
>>> thread dump next
>>> time and see what i can get. I was just wondering what all this
>>> has to do
>>> with my tcp-connections?
>>>
>>> Thx for the reply.
>>>
>>>
>>> On 29.04.2010, at 07:12, Denis Frolov wrote:
>>>
>>>> Another possible reason is that instances are busy processing
>>>> requests
>>>> (e.g. waiting on a database lock). You'd probably want to make a
>>>> stack
>>>> traces dump to check this.
>>>>
>>>> On Thu, Apr 29, 2010 at 12:47 AM, Chuck Hill <chill@...
>>>> >
>>>> wrote:
>>>>>
>>>>> Which version of WebObjects are you using. I think that WO 5.2
>>>>> had a
>>>>> bug that caused that exact problem.
>>>>>
>>>>> Chuck
>>>>>
>>>>>
>>>>> On Apr 28, 2010, at 5:57 AM, Orphee Sandjo wrote:
>>>>>
>>>>>> Hi,
>>>>>> I have a very serious problem. Here is the thing.
>>>>>> We have an application that is deployed on linux. Now, the
>>>>>> uptime is
>>>>>> extremely inconsistent. Everytime we get a "no instance
>>>>>> available",
>>>>>> a quick look at the netstat output shows that there are around
>>>>>> a dozen
>>>>>> java processes waiting in the state CLOSE_WAIT. No specific
>>>>>> errors are
>>>>>> reported. We basically have to shut down and restart the whole
>>>>>> application for it to operate normally.
>>>>>>
>>>>>> Any idea what could be the cause?
>>>>>>
>>>>>> --
>>>>>> Orphée Sandjo Software
>>>>>> Development
>>>>>> STAR Healthcare Management GmbH, Pierstr. 8, 50997 Cologne,
>>>>>> Germany
>>>>>> Fon:+49 2236 33665-50 Fax:+49 2236 33665-90 http://www.starhealthcare.info
>>>>>> -------------------------------------------------------------------
>>>>>> Sitz der Gesellschaft: Köln, Amtsgericht Köln, Reg.Nr.: HRB 55306
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> ------------------------------------------------------------------------------
>>>>>> _______________________________________________
>>>>>> Wonder-disc mailing list
>>>>>> Wonder-disc@...
>>>>>> https://lists.sourceforge.net/lists/listinfo/wonder-disc
>>>>>
>>>>> --
>>>>> Chuck Hill Senior Consultant / VP Development
>>>>>
>>>>> Practical WebObjects - for developers who want to increase their
>>>>> overall knowledge of WebObjects or who are trying to solve
>>>>> specific
>>>>> problems.
>>>>> http://www.global-village.net/products/practical_webobjects
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> ------------------------------------------------------------------------------
>>>>> _______________________________________________
>>>>> Wonder-disc mailing list
>>>>> Wonder-disc@...
>>>>> https://lists.sourceforge.net/lists/listinfo/wonder-disc
>>>>>
>>>
>>> --
>>> Orphée Sandjo Software Development
>>> STAR Healthcare Management GmbH, Pierstr. 8, 50997 Cologne, Germany
>>> Fon:+49 2236 33665-50 Fax:+49 2236 33665-90 http://www.starhealthcare.info
>>> -------------------------------------------------------------------
>>> Sitz der Gesellschaft: Köln, Amtsgericht Köln, Reg.Nr.: HRB 55306
>>>
>>>
>>>
>
> --
> Orphée Sandjo Software Development
> STAR Healthcare Management GmbH, Pierstr. 8, 50997 Cologne, Germany
> Fon:+49 2236 33665-50 Fax:+49 2236 33665-90 http://www.starhealthcare.info
> -------------------------------------------------------------------
> Sitz der Gesellschaft: Köln, Amtsgericht Köln, Reg.Nr.: HRB 55306
>
--
Orphée Sandjo Software Development
STAR Healthcare Management GmbH, Pierstr. 8, 50997 Cologne, Germany
Fon:+49 2236 33665-50 Fax:+49 2236 33665-90 http://www.starhealthcare.info
-------------------------------------------------------------------
Sitz der Gesellschaft: Köln, Amtsgericht Köln, Reg.Nr.: HRB 55306
|