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https://issues.apache.org/jira/browse/AXIS2-3011?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12516451
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Dustin Amrhein commented on AXIS2-3011:
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Jarek,
I agree with some of your observations above, but I have a few
comments/questions
With respect to #2: One observation, if you attempt to remove
ServiceDescription from the cache you must be careful that there no outstanding
requests utilizing this metadata. This will result in some strange situations
depending on what you do to that ServiceDescription reference when you remove
it from the cache.
> ServiceDescription caching leads to memory leak
> -----------------------------------------------
>
> Key: AXIS2-3011
> URL: https://issues.apache.org/jira/browse/AXIS2-3011
> Project: Axis 2.0 (Axis2)
> Issue Type: Bug
> Components: jaxws
> Reporter: Jarek Gawor
> Assignee: Ann Robinson
> Attachments: AXIS2-3011.patch
>
>
> The DescriptionFactoryImpl.createServiceDescription() function attempts to
> cache/reuse the ServiceDescription objects and that leads to memory leaks.
> First, a Hashtable is used for the cache. That means, any ServiceDescription
> created will always live in the cache and won't ever be reclaimed (and there
> is no clear cache function). Some sort of WeakHashMap could help the problem
> so that at least some unused ServiceDescription objects could be reclaimed.
> Second, the createServiceDescription() uses the
> DescriptionFactory.createClientConfigurationFactory().getClientConfigurationContext()
> to get the client configuration context. It looks like by default the
> ClientConfigurationFactory.getClientConfigurationContext() does NOT cache the
> configuration context. Therefore, each call creates a new configuration
> object. That means, that by default ServiceDescription will NOT be reused
> since the configuration context object instance is used to determine if the
> ServiceDescription should be reused or not (see DescriptionKey.equals()
> function).
> So, a simple program that calls createServiceDescription() repeatably in a
> loop (with the same arguments) will quickly run out of memory.
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