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https://issues.apache.org/jira/browse/VFS-558?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14281954#comment-14281954
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Bernd Eckenfels commented on VFS-558:
-------------------------------------
Hm, what version of VFS you are using? 2.0 has only 1855 lines in
AbstractFileObject and 2.1 (trunk) does not align with the line numbers. Do you
maybe have an older trunk version? Can you try a newer trunk version?
> java.lang.UnsupportedOperationException in FtpFileObject
> --------------------------------------------------------
>
> Key: VFS-558
> URL: https://issues.apache.org/jira/browse/VFS-558
> Project: Commons VFS
> Issue Type: Bug
> Affects Versions: 2.0
> Reporter: L
>
> I am getting the following exception in my code:
> java.lang.UnsupportedOperationException
> at java.util.Collections$UnmodifiableMap.remove(Collections.java:1345)
> at
> org.apache.commons.vfs2.provider.ftp.FtpFileObject.onChildrenChanged(FtpFileObject.java:271)
> at
> org.apache.commons.vfs2.provider.AbstractFileObject.childrenChanged(AbstractFileObject.java:240)
> at
> org.apache.commons.vfs2.provider.AbstractFileObject.notifyParent(AbstractFileObject.java:1931)
> at
> org.apache.commons.vfs2.provider.AbstractFileObject.handleCreate(AbstractFileObject.java:1577)
> at
> org.apache.commons.vfs2.provider.AbstractFileObject.moveTo(AbstractFileObject.java:1866)
> at
> org.apache.commons.vfs2.impl.DecoratedFileObject.moveTo(DecoratedFileObject.java:241)
> at
> org.apache.commons.vfs2.cache.OnCallRefreshFileObject.moveTo(OnCallRefreshFileObject.java:184)
> ...
> I guess it is caused by the fact that children field is set to
> EMPTY_FTP_FILE_MAP at the moment onChildrenChanged() is invoked.
> I also do not like line 1866 in AbstractFileObject.java. To me it looks like
> it might be the real cause of the problem:
> FileObjectUtils.getAbstractFileObject(destFile).handleCreate(getType());
> Must it not be destFile.getType()?
> But even if I am right about AbstractFileObject.java:1866,
> FtpFileObject.onChildrenChanged() must be corrected as well.
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