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https://issues.apache.org/jira/browse/VFS-618?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15385926#comment-15385926
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J. Baier edited comment on VFS-618 at 8/11/16 8:34 AM:
-------------------------------------------------------
Actually this might happen on two locations. The one I stated in my previous
comment and in addition to that here (stack trace is based on VFS 2.0):
{quote}
org.apache.commons.vfs2.FileSystemException: Could not read from
"sftp://user:***@192.168.0.1/folder/file"; because it is a not a file.
at
org.apache.commons.vfs2.provider.sftp.SftpFileObject.doGetInputStream(SftpFileObject.java:502)
at
org.apache.commons.vfs2.provider.AbstractFileObject.getInputStream(AbstractFileObject.java:1307)
at
org.apache.commons.vfs2.provider.DefaultFileContent.getInputStream(DefaultFileContent.java:396)
{quote}
In VFS 2.1, the code probably fixing the problem above is in line 617 of
SftpFileObject.doGetInputStream() in the finally block, but this code is
commented out.
was (Author: johnm):
Actually this might happen on two locations. The one I stated in my previous
comment and in addition to that here (stack trace is based on VFS 2.0):
{quote}
org.apache.commons.vfs2.FileSystemException: Could not read from
"sftp://user:***@192.168.0.1/folder/file"; because it is a not a file.
at
org.apache.commons.vfs2.provider.sftp.SftpFileObject.doGetInputStream(SftpFileObject.java:502)
at
org.apache.commons.vfs2.provider.AbstractFileObject.getInputStream(AbstractFileObject.java:1307)
at
org.apache.commons.vfs2.provider.DefaultFileContent.getInputStream(DefaultFileContent.java:396)
at com.mitxp.tools.filehandler.FileSystemsWatchDir.a(Unknown Source)
at com.mitxp.tools.filehandler.WatchDir.run(Unknown Source)
at java.lang.Thread.run(Thread.java:745)
{quote}
In VFS 2.1, the code probably fixing the problem above is in line 617 of
SftpFileObject.doGetInputStream() in the finally block, but this code is
commented out.
> sftp consumes channels on each cd when directory does not exist
> ---------------------------------------------------------------
>
> Key: VFS-618
> URL: https://issues.apache.org/jira/browse/VFS-618
> Project: Commons VFS
> Issue Type: Bug
> Affects Versions: 2.1
> Environment: all platforms
> Reporter: J. Baier
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> While resolving a FileObject on an sftp target for a directory that does not
> exist on the target, SftpFileSystem.getChannel() is called and while trying
> to cd to the workingDirectory, an SftpException is thrown but the channel
> object is not released.
> This leads to many sftp channels kept opoen on the target system and consumes
> unnecessary resources.
> A simple patch of releasing the channel in the caught SftpException in
> SftpFileSystem line 125 would solve this issue.
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