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https://issues.apache.org/jira/browse/VFS-120?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12485984
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Mario Ivankovits commented on VFS-120:
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As a workaround you can do it that way, as long as you do not use this manager
instance as singleton I see no side-effects.
Still, I (or we? :-) ) should try to fix it.
Ciao,
Mario
> SFTP-Exception: "com.jcraft.jsch.JSchException: session is down" if the
> SFTP-Server was killed and restarted (a normal shutdown of the SFTP-Server
> occured no Exception after restart.)
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: VFS-120
> URL: https://issues.apache.org/jira/browse/VFS-120
> Project: Commons VFS
> Issue Type: Bug
> Affects Versions: 1.0
> Environment: Tomcat 5.5
> JDK 6.0 (build with JDK 5)
> commons-vfs-1.0.jar:
> Specification-Title: Commons VFS
> Implementation-Version: 1.0
> JSCH: jsch-0.1.31.jar
> Reporter: Harald Brabenetz
> Priority: Critical
>
> The error occured after restarting if the SFTP-Server was KILLed!!.
> With a normal shutdown of the SFTP-Server, no exception after restarting
> occured.
> I found no function to force the reset of the session in SftpFileSystem.java
> There is a function:
> DefaultFileSystemManager manager =
> (DefaultFileSystemManager)VFS.getManager();
> manager.freeUnusedResources();
> But this works only if AbstractFileSystem.isReleaseable() returns true.
> And this this function return only true if all SFTP-FileObject are removed
> from the GarbageCollection (finally()-Methode).
> I cannot force a GarbageCollection.
> So there is no way to handle this Error! I must restart the VM
> (ServletContainer).
> org.apache.commons.vfs.FileSystemException: Could not copy
> "file:///C:/TEMP/....." to "sftp://......";.
> at
> org.apache.commons.vfs.provider.AbstractFileObject.copyFrom(AbstractFileObject.java:902)
> at
> com.bearingpoint.orf.chat.core.service.ExportManagerImpl.exportChatMessages(Unknown
> Source)
> at
> com.bearingpoint.orf.chat.core.service.ExportManagerImpl.startExportNow(Unknown
> Source)
> at
> com.bearingpoint.orf.chat.core.service.ExportManagerImpl$ExportManagerRunnable.run(Unknown
> Source)
> at java.lang.Thread.run(Thread.java:595)
> Caused by: org.apache.commons.vfs.FileSystemException: Could not write to
> "sftp://chat:[EMAIL PROTECTED]/home/chat/chatfile_12.zip".
> at
> org.apache.commons.vfs.provider.AbstractFileObject.getOutputStream(AbstractFileObject.java:1227)
> at
> org.apache.commons.vfs.provider.DefaultFileContent.getOutputStream(DefaultFileContent.java:373)
> at
> org.apache.commons.vfs.provider.DefaultFileContent.getOutputStream(DefaultFileContent.java:356)
> at org.apache.commons.vfs.FileUtil.copyContent(FileUtil.java:100)
> at
> org.apache.commons.vfs.provider.AbstractFileObject.copyFrom(AbstractFileObject.java:893)
> ... 4 more
> Caused by: org.apache.commons.vfs.FileSystemException: Could not connect to
> SFTP server at "sftp://chat:[EMAIL PROTECTED]/".
> at
> org.apache.commons.vfs.provider.sftp.SftpFileSystem.getChannel(SftpFileSystem.java:144)
> at
> org.apache.commons.vfs.provider.sftp.SftpFileObject.doGetOutputStream(SftpFileObject.java:402)
> at
> org.apache.commons.vfs.provider.AbstractFileObject.getOutputStream(AbstractFileObject.java:1219)
> ... 8 more
> Caused by: com.jcraft.jsch.JSchException: session is down
> at com.jcraft.jsch.Session.openChannel(Session.java:756)
> at
> org.apache.commons.vfs.provider.sftp.SftpFileSystem.getChannel(SftpFileSystem.java:122)
> ... 10 more
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