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From "vikas (JIRA)" <j...@apache.org>
Subject [jira] Commented: (VFS-120) 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.)
Date Thu, 05 Jul 2007 15:28:04 GMT

    [ https://issues.apache.org/jira/browse/VFS-120?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12510385
] 

vikas commented on VFS-120:
---------------------------

I am facing this problem also.
When i stop the ftp-server and restarted it.My activity become hang and i am not receiving
any error message.
2007-07-05 20:44:51,078 INFO  [Flow Thread(192168001166118364849065600301)] service     com.adeptia.indigo.services.AbstractService.execute(AbstractService.java:452)
- Process_Flow_For_SecureFTP|FTP_Source_Secure_Test|FtpSource|Running|administrators|192168001166118294134403100005|192168001166118364849037500300|192168001166118294076370300003|192168001166118364849068700307|admin|Execute|wshost
2007-07-05 20:45:24,140 ERROR [Flow Thread(192168001166118364849065600301)]  flow     com.adeptia.indigo.jelly.ActivityTag.runSync(ActivityTag.java:369)
- Process_Flow_For_SecureFTP|FTP_Source_Secure_Test|FtpSource|Failed|administrators|192168001166118294134403100005|192168001166118364849037500300|192168001166118294076370300003||admin|Error
in execution for activity FtpSource:FTP_Source_Secure_Test:192168001166118294076370300003[inputstream
is closed]|wshost


java.io.IOException: inputstream is closed
	at com.jcraft.jsch.ChannelSftp.fill(Unknown Source)
	at com.jcraft.jsch.ChannelSftp.header(Unknown Source)
	at com.jcraft.jsch.ChannelSftp.access$700(Unknown Source)
	at com.jcraft.jsch.ChannelSftp$2.read(Unknown Source)
	at java.io.BufferedInputStream.read1(Unknown Source)
	at java.io.BufferedInputStream.read(Unknown Source)
	at org.apache.commons.vfs.util.MonitorInputStream.read(MonitorInputStream.java:88)
	at java.io.BufferedInputStream.read1(Unknown Source)
	at java.io.BufferedInputStream.read(Unknown Source)
	at org.apache.commons.vfs.util.MonitorInputStream.read(MonitorInputStream.java:88)
	at java.io.FilterInputStream.read(Unknown Source)
	at com.adeptia.indigo.services.transport.support.AbstractStreamSource.writeOutputStreamCallback(AbstractStreamSource.java:112)
rethrown as 
rethrown as 
com.adeptia.indigo.services.ServiceException: inputstream is closed
	at com.adeptia.indigo.services.transport.support.AbstractStreamSource.execute(AbstractStreamSource.java:91)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.apache.commons.modeler.BaseModelMBean.invoke(BaseModelMBean.java:483)
	at com.sun.jmx.mbeanserver.DynamicMetaDataImpl.invoke(Unknown Source)
	at com.sun.jmx.mbeanserver.MetaDataImpl.invoke(Unknown Source)
	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(Unknown Source)
	at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(Unknown Source)
	at com.adeptia.indigo.utils.RemoteMBeanProxy$LocalHandler.invokeOperation(RemoteMBeanProxy.java:441)
	at com.adeptia.indigo.utils.RemoteMBeanProxy$Handler.invoke(RemoteMBeanProxy.java:294)
	at $Proxy2.execute(Unknown Source)
	at com.adeptia.indigo.jelly.ActivityTag.runSync(ActivityTag.java:363)
	at com.adeptia.indigo.jelly.ActivityTag.doTag(ActivityTag.java:250)
	at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:278)
	at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:133)
	at com.werken.blissed.jelly.JellyActivity.perform(JellyActivity.java:120)
	at com.werken.blissed.ProcessEngine.enterState(ProcessEngine.java:391)
	at com.werken.blissed.ProcessEngine.followTransition(ProcessEngine.java:509)
	at com.werken.blissed.ProcessEngine.checkTransitions(ProcessEngine.java:458)
	at com.werken.blissed.ProcessEngine.startProcess(ProcessEngine.java:366)
	at com.werken.blissed.ProcessEngine.spawn(ProcessEngine.java:299)
	at com.adeptia.indigo.processflow.BlissedProcessFlow.execute(BlissedProcessFlow.java:159)
	at com.adeptia.indigo.transaction.IndigoTransaction.execute(IndigoTransaction.java:423)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.apache.commons.modeler.BaseModelMBean.invoke(BaseModelMBean.java:483)
	at com.sun.jmx.mbeanserver.DynamicMetaDataImpl.invoke(Unknown Source)
	at com.sun.jmx.mbeanserver.MetaDataImpl.invoke(Unknown Source)
	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(Unknown Source)
	at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(Unknown Source)
	at javax.management.remote.rmi.RMIConnectionImpl.doOperation(Unknown Source)
	at javax.management.remote.rmi.RMIConnectionImpl.access$100(Unknown Source)
	at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(Unknown Source)
	at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(Unknown Source)
	at javax.management.remote.rmi.RMIConnectionImpl.invoke(Unknown Source)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
	at sun.rmi.transport.Transport$1.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at sun.rmi.transport.Transport.serviceCall(Unknown Source)
	at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
	at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)
2007-07-05 20:45:24,171 INFO  [Flow Thread(192168001166118364849065600301)] service     com.adeptia.indigo.services.AbstractService.dispose(AbstractService.java:232)
- Process_Flow_For_SecureFTP|FTP_Source_Secure_Test|FtpSource|Aborted|administrators|192168001166118294134403100005|192168001166118364849037500300|192168001166118294076370300003|192168001166118364849068700307|admin|Activity
disposed. Start Time:2007-07-05 20:44:50 End Time:2007-07-05 20:45:24 Run Time:33 second(s)
453 ms. Operation count:10846208  Bytes Average:324222.28 operations/sec|wshost
2007-07-05 20:45:24,203 ERROR [Flow Thread(192168001166118364849065600301)]  flow     com.adeptia.indigo.jelly.ActivityTag.runSync(ActivityTag.java:410)
- Process_Flow_For_SecureFTP|FTP_Source_Secure_Test|FtpSource|Failed|administrators|192168001166118294134403100005|192168001166118364849037500300|192168001166118294076370300003||admin|Error
in disposing activity FtpSource:FTP_Source_Secure_Test:192168001166118294076370300003[Could
not close the input stream for file "sftp://maan:maan@vikas/transport/source/text_100mb.txt".]|wshost
org.apache.commons.vfs.FileSystemException: Could not close the input stream for file "sftp://maan:maan@vikas/transport/source/text_100mb.txt".
	at org.apache.commons.vfs.provider.DefaultFileContent$FileContentInputStream.close(DefaultFileContent.java:565)
	at com.adeptia.indigo.services.transport.ftp.FtpSource.dispose(FtpSource.java:201)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.apache.commons.modeler.BaseModelMBean.invoke(BaseModelMBean.java:483)
	at com.sun.jmx.mbeanserver.DynamicMetaDataImpl.invoke(Unknown Source)
	at com.sun.jmx.mbeanserver.MetaDataImpl.invoke(Unknown Source)
	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(Unknown Source)

> 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
>         Attachments: SftpFileSystem-patch.txt
>
>
> 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:chat@10.1.5.130/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:chat@10.1.5.130/".
>         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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