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https://issues.apache.org/jira/browse/JCR-4957?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17746785#comment-17746785
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Woonsan Ko commented on JCR-4957:
---------------------------------

Hi [~reschke],

I recall somethings on why/how commons-vfs2 relies on the standalone-components 
(not standalone itself).
As described in JCR-4401 (and discussed [1]), Jackrabbit has split the old 
standalone module into two: standalone (a demo) and standalone-components (a 
library). To help commons-vfs2 be able to verify its VFS2 over WebDAV, we moved 
some public classes originally in the demo project to the library project, at 
least for commons-vfs2 as of JCR-4401.
I'm not sure if it is feasible to bring it back easily, but it would be great 
to see commons-VFS2 being verified with JR webdav server.

Woonsan

[1] https://lists.apache.org/thread/87rdszdzx4nqc7x0o9x4y10p338doc1p

> Jackrabbit 2.21.18 breaks binary compatiblity with 2.21.17
> ----------------------------------------------------------
>
>                 Key: JCR-4957
>                 URL: https://issues.apache.org/jira/browse/JCR-4957
>             Project: Jackrabbit Content Repository
>          Issue Type: Bug
>    Affects Versions: 2.21.18
>            Reporter: Gary D. Gregory
>            Priority: Major
>
> We see this break in Apache Commons VFS when trying to update from 2.21.17 to 
> 2.21.18:
> {quote}[INFO] -------------------------------------------------------------
> [ERROR] COMPILATION ERROR :
> [INFO] -------------------------------------------------------------
> [ERROR] 
> /C:/Users/ggregory/git/a/commons-vfs/commons-vfs2-jackrabbit2/src/test/java/org/apache/commons/vfs2/provider/webdav4/test/Webdav4ProviderTestCase.java:[231,27]
>  incompatible types: java.lang.String[] cannot be converted to 
> org.apache.commons.cli.CommandLine
> [ERROR] 
> /C:/Users/ggregory/git/a/commons-vfs/commons-vfs2-jackrabbit2/src/test/java/org/apache/commons/vfs2/provider/webdav4/test/Webdav4ProviderTestCase.java:[231,18]
>  cannot find symbol
> symbol: constructor (java.lang.String[])
> [ERROR] 
> /C:/Users/ggregory/git/a/commons-vfs/commons-vfs2-jackrabbit2/src/test/java/org/apache/commons/vfs2/provider/webdav4/test/Webdav4ProviderTestCase.java:[235,15]
>  method run in class org.apache.jackrabbit.standalone.Main cannot be applied 
> to given types;
> required: java.io.File,java.io.File,java.io.File
> found: no arguments
> reason: actual and formal argument lists differ in length
> [INFO] 3 errors
> {quote}
> Breaking BC in a non-major release should not be allowed IMO.



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