[jira] [Created] (VFS-813) NullPointerException in SftpClientFactory when connect with private key

["Andrey Turbanov (Jira)" <ji...@apache.org>]

Andrey Turbanov created VFS-813:
-----------------------------------

             Summary: NullPointerException in SftpClientFactory when connect with private key
                 Key: VFS-813
                 URL: https://issues.apache.org/jira/browse/VFS-813
             Project: Commons VFS
          Issue Type: Bug
    Affects Versions: 2.9.0
            Reporter: Andrey Turbanov


I'm trying to use common-vfs2 to load files from sftp server.
Got NPE inside SftpClientFactory, when trying to connect to server.

{noformat}
W 211222 162440.053 [ST3-Def] DxReconciliationFileLoader -
org.apache.commons.vfs2.FileSystemException: Could not connect to SFTP server at "sftp://sftp.myhost.com/".
	at org.apache.commons.vfs2.provider.sftp.SftpFileProvider.createSession(SftpFileProvider.java:72) ~[commons-vfs2-2.9.0.jar:2.9.0]
	at org.apache.commons.vfs2.provider.sftp.SftpFileProvider.doCreateFileSystem(SftpFileProvider.java:92) ~[commons-vfs2-2.9.0.jar:2.9.0]
	at org.apache.commons.vfs2.provider.AbstractOriginatingFileProvider.getFileSystem(AbstractOriginatingFileProvider.java:92) ~[commons-vfs2-2.9.0.jar:2.9.0]
	at org.apache.commons.vfs2.provider.AbstractOriginatingFileProvider.findFile(AbstractOriginatingFileProvider.java:71) ~[commons-vfs2-2.9.0.jar:2.9.0]
	at org.apache.commons.vfs2.provider.AbstractOriginatingFileProvider.findFile(AbstractOriginatingFileProvider.java:55) ~[commons-vfs2-2.9.0.jar:2.9.0]
	at org.apache.commons.vfs2.impl.DefaultFileSystemManager.resolveFile(DefaultFileSystemManager.java:788) ~[commons-vfs2-2.9.0.jar:2.9.0]
	at org.apache.commons.vfs2.impl.DefaultFileSystemManager.resolveFile(DefaultFileSystemManager.java:835) ~[commons-vfs2-2.9.0.jar:2.9.0]
	at com.tools.DxReconciliationFileLoader.downloadFiles(DxReconciliationFileLoader.java:118) ~[classes/:?]
Caused by: org.apache.commons.vfs2.FileSystemException: Could not connect to SFTP server at "sftp.myhost.com".
	at org.apache.commons.vfs2.provider.sftp.SftpClientFactory.createConnection(SftpClientFactory.java:228) ~[commons-vfs2-2.9.0.jar:2.9.0]
	at org.apache.commons.vfs2.provider.sftp.SftpFileProvider.createSession(SftpFileProvider.java:65) ~[commons-vfs2-2.9.0.jar:2.9.0]
	... 16 more
Caused by: java.lang.NullPointerException
	at java.lang.String.<init>(String.java:251) ~[?:?]
	at org.apache.commons.vfs2.provider.sftp.SftpClientFactory.createConnection(SftpClientFactory.java:159) ~[commons-vfs2-2.9.0.jar:2.9.0]
	at org.apache.commons.vfs2.provider.sftp.SftpFileProvider.createSession(SftpFileProvider.java:65) ~[commons-vfs2-2.9.0.jar:2.9.0]
	... 16 more
{noformat}
{{char[] username}} is *null*.
Looks like I should specify username somewhere.
I think if username is required for key-based auth, then library should handle it better, than throwing NPE.



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