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https://issues.apache.org/jira/browse/VFS-175?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16477545#comment-16477545
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Gary Gregory commented on VFS-175:
----------------------------------
[~arbfranklin],
Thank you for you report.
Would you rather the software throw a {{FileSystemException}} instead of a
{{NullPointerException}}?
Please feel free to submit a PR [https://github.com/apache/commons-vfs/]
Gary
> NullPointerException in AbstractFileSystem.resolveFile
> ------------------------------------------------------
>
> Key: VFS-175
> URL: https://issues.apache.org/jira/browse/VFS-175
> Project: Commons VFS
> Issue Type: Bug
> Affects Versions: 1.0
> Reporter: Andrew Franklin
> Priority: Trivial
>
> 1. Prepare a large file that will take a while to transfer (> 2GB).
> 2. Start an ftp file transfer.
> 3. Once the transfer begins and you see the file start to grow on the
> destination side, delete it.
> If you try to transfer again after it fails, you can get the following
> exception...
> {noformat}
> Caused by: org.apache.commons.vfs.FileSystemException: Could not determine
> the type of file "ftp://anonymous:password@server/";.
> at
> org.apache.commons.vfs.provider.AbstractFileObject.attach(AbstractFileObject.java:1345)
> at
> org.apache.commons.vfs.provider.AbstractFileObject.getType(AbstractFileObject.java:443)
> at
> org.apache.commons.vfs.provider.AbstractFileObject.exists(AbstractFileObject.java:433)
> at
> org.apache.commons.vfs.provider.AbstractFileObject.findFiles(AbstractFileObject.java:1055)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:585)
> at
> com.company.vfs.RetryRemoteFileSystemProxy.invoke(RetryRemoteFileSystemProxy.java:70)
> at $Proxy1.findFiles(Unknown Source)
> at
> com.company.vfs.VfsFileSource.findMatchingSourceFiles(VfsFileSource.java:216)
> at com.company.vfs.VfsFileSource.discover(VfsFileSource.java:191)
> ... 5 more
> Caused by: java.lang.NullPointerException
> at
> org.apache.commons.vfs.provider.AbstractFileSystem.resolveFile(AbstractFileSystem.java:272)
> at
> org.apache.commons.vfs.provider.AbstractFileSystem.resolveFile(AbstractFileSystem.java:267)
> at
> org.apache.commons.vfs.provider.AbstractFileObject.getParent(AbstractFileObject.java:543)
> at
> org.apache.commons.vfs.provider.ftp.FtpFileObject.getInfo(FtpFileObject.java:182)
> at
> org.apache.commons.vfs.provider.ftp.FtpFileObject.doAttach(FtpFileObject.java:174)
> at
> org.apache.commons.vfs.provider.AbstractFileObject.attach(AbstractFileObject.java:1331)
> ... 16 more
> {noformat}
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