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From "Lu, Wentao" <>
Subject RE: memory leak on OpenCMIS bridge?
Date Mon, 30 Jun 2014 22:15:47 GMT
Hi Florian,

We are testing under "org.apache.chemistry.opencmis.bridge.httpsession.sample"
package, so I guess it is HttpSession implementation.  Correct me if I am wrong, our current
the architecture is 1 ESB->Load Balancer->2 OpenCMIS Bridge Servers->2 CMIS Servers,
I am wondering if we enable cookies(session stickiness on LB), then all transactions could
possible go to one OpenCMIS Bridge server only. 

Our current session time is 5 minutes in web.xml, this may help to reduce the impact of "lots
of unused HTTP session". I am thinking if we should reduce Chemistry client cache TTL from
default 2 hours to shorter time or if it is possible we can disable client cache completely?


-----Original Message-----
From: Florian Müller [] 
Sent: 2014, June 30 1:16 PM
Cc: Lu, Wentao
Subject: Re: memory leak on OpenCMIS bridge?

Hi Wentao,

Are you using the HttpSession or the LruCache implementation?
If you are using the HttpSession implementation, make sure that the clients have cookies enabled.
Otherwise you are collecting a lot of unused HTTP sessions on the server side that fill up
your memory.

- Florian

> Thanks Florian for your help again.
> I've uploaded the screenshot into Google Doc  
> sharing
> Could you help to have a look?
> Wentao
> -----Original Message-----
> From: Florian Müller []
> Sent: 2014, June 30 12:38 PM
> To:
> Cc: Lu, Wentao
> Subject: Re: memory leak on OpenCMIS bridge?
> Hi Wentao,
> Attachments and images are not forwarded to this mailing list. We cannot see your screenshot.
> But we (SAP) are using the OpenCMIS Bridge in a productive environment with a lot of
requests and sessions. We haven't encountered any memory leaks, yet.
> - Florian
>> Hi,
>> We are load testing "OpenCMIS Bridge 0.10.0" but looks like it has 
>> “memory leak” issue. I am wondering if that because of the OpenCMIS 
>> client cache or something else? Here is the screenshot from IBM 
>> HeapAnalyzer.
>> Thanks
>> Wentao
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