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From David Jencks <>
Subject Re: Stateless/sessionless servlet consuming too much memory
Date Tue, 08 Feb 2011 17:23:21 GMT
Hi Morten,

I'm not sure why this is happening, it might be a bug.  Just to be sure we investigate the
right context, is this

- a servlet
- a pojo web service (if so, jaxrpc, jaxws, or something else)
- an ejb web service?

The ContextManager doesn't have anything to do with http sessions, it is more concerned with
keeping the user identity in a threadlocal during each request so it is always available for
authorization decisions.

Thanks for your investigations so far!

david jencks

On Feb 8, 2011, at 4:51 AM, Morten Svan├Žs wrote:

> Hi,
> I'm currently having memory problems with a stateless web service
> running in Geronimo 2.2.1.
> The problem is that after running for a while the server starts
> consuming more and more memory, some kind of leak or accumulation of
> unwanted objects occur.
> After analyzing the heap dumps in mat I can clearly see that the
> accumulation happens inside the
>'s subjectContexts
> IdentityHashMap.
> The login happens via http basic and a custom LoginModule looking up
> users in the database. The login module is based on the
> GenericSecurityRealm and SQLLoginModule.
> The service is a standard web servlet running on jetty. The service is
> called typically many hundred times a second by the client with stand
> http basic auth urls, so there is actually no need for sessions at
> all.
> It seems like when users log on to the service the
> credentials/siubject gets stuck in the subjectContexts hashmap even
> though the session timeout is set for 1 sec in the web.xml file.
> I've disabled session cookies by using information found here:
> I assume this is some kind of misconfiguration on our side and not the
> stand. behavior with Geronimo, anyone who can help us point out the
> direction for solving this would be greatly appreciated.
> Regards,
> Netroms Nacoma

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