Re: [EsiGate-devel] Webassembletool-devel Digest, Vol 2, Issue 4

[Juigne, S. <ste...@ca...>]

That's exactly the fix I did, but for now test fails, I'm still investigating....

Regards

-----Message d'origine-----
De : Nicolas Richeton [mailto:nic...@gm...] 
Envoyé : mercredi 21 mars 2012 16:13
À : web...@li...
Objet : Re: Webassembletool-devel Digest, Vol 2, Issue 4

Sure, I'm sending this to Stephane (watstf) so he can make the fix and send the pached package to performance environment.
Stéphane, be sure to register to -devel list so you can reply directly :-)

Nicolas

> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Wed, 21 Mar 2012 15:23:58 +0100
> From: Fran?ois-Xavier Bonnet 	<fra...@ce...>
> Subject: Re: [EsiGate-devel] Thread locked under load
> To: web...@li...
> Message-ID: <4F6...@ce...>
> Content-Type: text/plain; charset="iso-8859-1"
> 
> OK, so we should wrap the TreeSet and HashMap used in Output class using 
> Collections.synchronizedSortedSet(...) and Collections.synchronizedMap(...)
> Nicolas, can you check that it fixes the problem ?
> 
> Le 21/03/2012 15:10, Alexis Thaveau a ?crit :
>> http://java.dzone.com/articles/concurrency-and-hashmap
>> 
>> Le 21/03/2012 15:08, Alexis Thaveau a ?crit :
>>> The main bug is that headers.put is called by several threads at same 
>>> time. As you said, thread are still runnable,  i think map is broken, 
>>> and result is a kind of infinite loop.
>>> 
>>> 
>>> 
>>> 
>>> 
>>> Le 21/03/2012 14:53, Fran?ois-Xavier Bonnet a ?crit :
>>>> This is a real problem but do you think it can explain the 100% CPU ?
>>>> Shouldn't we have some ConcurrentModificationException ?
>>>> Cordialement,
>>>> 
>>>> Fran?ois-Xavier Bonnet
>>>> Responsable de production
>>>> Smile - Open Source Solutions
>>>> www.smile.fr
>>>> T?l : +33 1 41 40 59 28
>>>> Fax : +33 1 47 30 25 61
>>>> GSM : +33 6 17 45 19 08
>>>> 
>>>> Le 21/03/2012 11:52, Alexis Thaveau a ?crit :
>>>>> Hi,
>>>>> 
>>>>> Implementation of TreeSet is not synchronized => not thread safe. 
>>>>> http://docs.oracle.com/javase/6/docs/api/java/util/TreeSet.html
>>>>> TreeSet must be wrapped with Collections.synchronizedSortedSet || 
>>>>> <http://docs.oracle.com/javase/6/docs/api/java/util/Collections.html#synchronizedSortedSet%28java.util.SortedSet%29>
>>>>> 
>>>>> 
>>>>> Le 21/03/2012 11:44, Nicolas Richeton a ?crit :
>>>>>> Hi all
>>>>>> 
>>>>>> We have an issue with with ESIGate 2.19 under load, resulting to 100% cpu usage and lock.
>>>>>> 
>>>>>> Please have a look to :
>>>>>> http://sourceforge.net/apps/mantisbt/webassembletool/view.php?id=84
>>>>>> 
>>>>>> We have the setup show the issue, but not easy to test. Problem arises after several hours.
>>>>>> 
>>>>>> This seems to be linked to the new cache system because older versions of ESIGate did not show any locking under heavy load.
>>>>>> 
>>>>>> Andreii : any idea/comments on this issue ?
>>>>>> 
>>>>>> Nicolas
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>>>>> 
>>>>> 
>>>>> -- 
>>>>> Alexis Thaveau
>>>>> Agence Nantes
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>>>>> 
>>>>> 
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>>> 
>>> 
>>> -- 
>>> Alexis Thaveau
>>> Agence Nantes
>>> Smile - Open Source Solutions
>>> http://www.smile.fr
>>> T?l :  02 40 08 68 10
>>> Mailto :ale...@sm...
>>> 
>>> 
>>> ------------------------------------------------------------------------------
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>>> _______________________________________________
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>> 
>> 
>> -- 
>> Alexis Thaveau
>> Agence Nantes
>> Smile - Open Source Solutions
>> http://www.smile.fr
>> T?l :  02 40 08 68 10
>> Mailto :ale...@sm...
>> 
>> 
>> ------------------------------------------------------------------------------
>> This SF email is sponsosred by:
>> Try Windows Azure free for 90 days Click Here
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>> 
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