[rules-users] permgen leak
adarsh.chaini at hsbcib.com
adarsh.chaini at hsbcib.com
Thu Jan 16 05:09:22 EST 2014
Mark,
Thanks for your reply.
We have been testing against 5.5.0.Final and we faced some problems .
One of the problem was that we had a quick fix to mvel component from
redhat guys (with their good will )to one of the critical concurrency
issues we faced .But it seems that fix is not part of these community
releases and there has been changes to mvel after that change.
Is there a way that we can make the same permgen fix to the 5.4.0.Final
codebase?.
Or
Is this possible to get the concurrency fix these newer versions?.
Thanks and regards,
Adarsh CHAINI
SENIOR LEAD DEVELOPMENT SPECIALIST | HSBC Bank Plc
8 Canada Square, London E14 5HQ, UK
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Email
adarsh.chaini at hsbcib.com
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Protect our environment - please only print this if you have to!
From:
Mark Proctor <mproctor at codehaus.org>
To:
Rules Users List <rules-users at lists.jboss.org>
Date:
15/01/2014 21:05
Subject:
Re: [rules-users] permgen leak
Sent by:
rules-users-bounces at lists.jboss.org
why not just update to 5.6, it?s fixed there.
http://downloads.jboss.org/drools/release/5.6.0.Final/
You can specify dialect at the top of the drl file, to be applied to all
rules in that file. But that?s about it.
Mark
On 15 Jan 2014, at 20:51, adarsh.chaini at hsbcib.com wrote:
Is this possible to set everything to MVEL Dialect as we are using
JavaDialect in all our rules.
We had this few times before and we managed to avoid it with usage of
CMSClassUnlaoadingEnabled .
But this has again comeback recently because the rate at which the classes
are produced with load,CMS is unable to collect the permgen space at same
rate so it trips
Thanks and regards,
Adarsh CHAINI
SENIOR LEAD DEVELOPMENT SPECIALIST | HSBC Bank Plc
8 Canada Square, London E14 5HQ, UK
_______________________________________________
Phone
Int: (0)79914720 Ext: +44 (0)20 79914720
Mobile
+44(0)7595530105
Email
adarsh.chaini at hsbcib.com
_______________________________________________
Protect our environment - please only print this if you have to!
From:
Mark Proctor <mproctor at codehaus.org>
To:
Rules Users List <rules-users at lists.jboss.org>
Date:
15/01/2014 18:27
Subject:
Re: [rules-users] permgen leak
Sent by:
rules-users-bounces at lists.jboss.org
You can try setting everything to the MVEL dialect, and also forcing MVEL
to reflection via the system property (turning off jit)
http://mvel.codehaus.org/Disabling+the+JIT+Compiler
Mark
On 15 Jan 2014, at 18:23, adarsh.chaini at hsbcib.com wrote:
Hi Mark/Davide
Is there a work around to this problem in 5.4?.
Thanks and regards,
Adarsh CHAINI
SENIOR LEAD DEVELOPMENT SPECIALIST | HSBC Bank Plc
8 Canada Square, London E14 5HQ, UK
_______________________________________________
Phone
Int: (0)79914720 Ext: +44 (0)20 79914720
Mobile
+44(0)7595530105
Email
adarsh.chaini at hsbcib.com
_______________________________________________
Protect our environment - please only print this if you have to!
From:
Mark Proctor <mproctor at codehaus.org>
To:
Rules Users List <rules-users at lists.jboss.org>
Date:
08/01/2014 04:46
Subject:
Re: [rules-users] permgen leak
Sent by:
rules-users-bounces at lists.jboss.org
For anyone interested. The commit involves addressing two needs.
1) Enforcing MVEL reflection mode throughout - MVEL ASM optimiser can
NEVER be used for anything (it doesn?t add much value anyway).
2) Avoiding giving the template system the root class loader(which we use
for dynamic stuff), as those templates are statically cached.
https://github.com/sotty/drools/commit/1b75d4785861e72338cc5ea1280610a7937be017
Mark
On 8 Jan 2014, at 00:53, Mark Proctor <mproctor at codehaus.org> wrote:
> The root of the perm gen leak has now be solved, thanks to some heroic
work by community developer Davide Sottara.
>
> This is just in time for the 5.6 release going out this week. You will
not need to use the kbase.dispose() work around.
>
> Mark
> On 6 Jan 2014, at 20:50, Mark Proctor <mproctor at codehaus.org> wrote:
>
>> The 5.6 approach should be considered a work around, not a fix.
Somewhere a ref is being held, that shouldn?t be - we just haven?t found
it yet.
>>
>> Mark
>>
>> On 6 Jan 2014, at 19:17, Davide Sottara <dsotty at gmail.com> wrote:
>>
>>> I have run pmander's tests, and reported in a previous email.
>>> The leak in 5.x is due to the nature of the composite classloader, and
>>> dispose()
>>> forces the memory to be released. I don't remember if that fix was in
>>> 5.6.CR1
>>> (probably not), so you may have to try 5.6.0-SNAPSHOT or wait for the
>>> end of the week.
>>> 6.x does not suffer from the same problem, but has a different issue -
>>> no way
>>> to unload kie modules once they are cached - which Mario has been
>>> working on.
>>> In either case, pmander's test works fine in both 5.6.x and 6.x after
>>> these fixes
>>> Davide
>>>
>>> On 01/06/2014 07:56 PM, Mark Proctor wrote:
>>>> I?ve been told 5.6 will be released this week. This is because the
JCR2GIT migration tool, in 5.6 is needed for our 6.0 product.
>>>>
>>>> Davide's current kbase.dispose() method, on the concrete class,
should just be considered a work around for the problem. Unless this is
fixed by someone in the community, I don?t think any core developers will
have time to address this. At least not for 5.x; we?ll continue to look
into it for 6.x.
>>>>
>>>> Mark
>>>>
>>>>
>>>> On 6 Jan 2014, at 16:14, brachi <brachi.w at sapiens.com> wrote:
>>>>
>>>>> see previous messages, pmander attached a unit test
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> View this message in context:
http://drools.46999.n3.nabble.com/permgen-leak-tp4027038p4027539.html
>>>>> Sent from the Drools: User forum mailing list archive at Nabble.com.
>>>>> _______________________________________________
>>>>> rules-users mailing list
>>>>> rules-users at lists.jboss.org
>>>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>>>
>>>> _______________________________________________
>>>> rules-users mailing list
>>>> rules-users at lists.jboss.org
>>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>>>
>>>
>>> _______________________________________________
>>> rules-users mailing list
>>> rules-users at lists.jboss.org
>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
>
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designed to ensure that the firm would give unbiased and full advice to
the corporate finance client about the valuation and pricing of the
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