[jetty-discuss] Re: A study of Commons-logging problems...

[Yannick M. <yan...@fa...>]

Ceki Gülcü wrote:
> 
> On  Thu, 10 Feb 2005 14:30:19 +0000, Yannick Menager wrote:
> 
>  > No, actually that's the whole reason behind using the ClassLoader
>  > Factory cache, each classloader has it's own private log
>  > implementation. So two webapps can each have it's own private version
>  > of log4j, for example. In that aspect the JCL discovery system is
>  > quite good, the problem comes from the fact that they use the
>  > Hashtable to map ClassLoader to Factory, which is the root of all the
>  > JCL evils. However that is easily solved by using a WeakHashMap
>  > instead ( losing 1.1 compatibility by doing that ).
> 
> Hello Yannick,
> 
> Problems of Type-III, that is holding references to class loader
> instances, is just the tip of the iceberg. JCL's problems of Type-I
> and Type-II are more subtle, harder to spot and tend to be diffused
> throughout the code. Unless you have a JVM embedded in your brain, you
> can be staring at the bug for an hour and still not see that it is
> there.

Hmm... interesting, i thought that was the only problem... Can you point 
me to some more details on those Type-II problems