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From Berin Loritsch <>
Subject Re: Potential Classloader bug
Date Thu, 02 Aug 2001 13:30:28 GMT
Berin Loritsch wrote:
> Cocoon has a potential classloader issue.  The Excalibur that comes with
> Cocoon has support for the <driver/> entry in the JdbcDataSource--and uses
> the Context ClassLoader to load the driver's class.  The only problem is
> that even though the class is properly loaded, it is not loaded in the
> same classloader that created the JdbcDataSource.
> Now, the question becomes: Should JdbcDataSource use the context classloader,
> or should Cocoon fix the classloader issue?  If JdbcDataSource does it, that
> means the class will be loaded by the same classloader that created JdbcDataSource.
> This may or may not be a bad thing.  If JdbcDataSource is loaded by the
> Boot ClassLoader, then the driver will be loaded for the Boot ClassLoader.
> The thing is that the JdbcDataSource works fine when the ClassLoader in the
> Context ClassLoader (Thread.currentThread().getContextClassLoader()) is the
> same one or a parent of the classloader that loaded the JdbcDataSource.
> There is some wierdness with the DriverManager.getConnection() so it may be
> that the Driver class should be loaded with the the same classloader as
> JdbcDataSource.

I tried the approach of using JdbcDataSource's ClassLoader to load the class,
but that didn't work.  Hmmm.

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