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From David Jencks <>
Subject Re: JarURLConnection doesn't work "useCaches" property
Date Tue, 04 Aug 2009 16:31:20 GMT
Hi Masayoshi,

I think this is a bug, although we could try to say the javadoc lets  
us fail to get a fresh copy of the object.  Could you please open a  
jira entry for this problem?

The difficulty in fixing this is that we have several subclasses of  
JarFile, NestedJarFile and UnpackedJarFile,   I haven't reviewed the  
behavior of clone() recently but wonder if we can make it work here.   
If you would like to experiment and provide a patch that would be great.

While it is not a desirable solution you might be able to modify your  
program to open new URL connections for each use of the jar file.

david jencks

On Aug 4, 2009, at 7:04 AM, Masayoshi Yamashita wrote:

> Hello Jack,
> I want to achieve handling JarFile and JarEntry in some programs.
> Each program gets JarFile with false "useCaches", and calls
> JarFile#getInputStream and JarFile#close methods.
> However, when JarFile instances are same, first program closes tha
> JarFile, so second program can't handle the JarFile.
> Therefore I hope to get different instances.
> Also, it is described in the javadoc of "useCaches" field as follows.
> "If false, the protocol must always try to get a fresh copy of the  
> object."
> I think that getJarFile method of
> "org.apache.geronimo.kernel.classloader.JarFileUrlConnection" must
> return a different instance, when "useCaches" is false.
> I'm using Geronimo in Windows XP.
> Best regards,
> --------------------
> Masayoshi Yamashita

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