On 22/04/2019 06:41, Akram Hussain wrote:
> Hi Mark,
> 
> Actually, I am declaring a Loader in tomcat\conf\context.xml file as

Don't do that.

> for Tomcat 7.0.68, It was working fine.

<snip/>

> -----------------------------------------------------------------------------------------------------------------------
> 
> After upgrade to tomcat 9.0.17.
> 
> The start method of SharedClassLoader.java is expecting resources variable
> needs to be populated.
> 
> How can I pass the Resources to above SharedClassLoader?

With difficulty and an awful lot of work. The resources implementation
was completely re-written for Tomcat 8 onwards.

> Any idea?

Follow the advice in my previous mail.

<snip/>

> On Fri, Apr 19, 2019 at 4:09 AM Mark Thomas <ma...@apache.org> wrote:
>> The OP is trying to load JARs so the /path/to/your/shared/libraries
>> directory needs to be mounted at WEB-INF/lib, not WEB-INF/classes.
>>
>> We (OK I since I wrote this stuff) should probably have better
>> documented which implementation to pick.
>>
>> You pick the implementation based on where the files you want to insert
>> are located.
>>
>> If you want to insert a single file, use FileResourceSet
>> If you want to insert a directory tree, use DirResourceSet
>> If you want to insert files from inside an archive (JAR) then use a
>> JarResourceSet.
>>
>> Note: Using a JarResourceSet effectively unpacks the archive as far as
>> Tomcat is concerned so Tomcat sees directories and files, not a single
>> JAR file.
>>
>> In this case you have a directory of JAR files so you want a
>> DirResourceSet.
>>
>> Assuming you want those JAR files to be treated as if they were placed
>> in WEB-INF/lib then you want:
>>
>> <Resources>
>>   <PostResources
>>       webAppMount="/WEB-INF/lib"
>>       base="/path/to/your/shared/libraries"
>>       className="org.apache.catalina.webresources.DirResourceSet"
>>   />
>> </Resources>
>>
>> That has the same effect as copying the entire contents of
>> /path/to/your/shared/libraries to WEB-INF/lib.
>>
>> If you want this to apply to every web application you deploy then add
>> the above to global context.xml in CATALINA_BASE/conf/context.xml

Mark

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