Overview
Contains multiple Smart Services for interacting with a remote file server via SFTP, FTP, or SCP. Using these services, an Appian application can be configured to send and receive files, folders, and metadata in a process. Features support for zlib compression.
Key Features & Functionality
Smart Services included:
Functions:
Hi team!
Using 'Get Remote Directory Contents Over SFTP' smart service we´re seeing the following error:
2023-01-24 10:06:45,716 [ajp-nio-0.0.0.0-8009-exec-2111] ERROR com.appiancorp.process.engine.UnattendedJavaActivityRequest - An error occurred while executing activity: id=7559, classname=com.appian.ps.plugins.sftpsmartservices.GetRemoteDirectoryContentsOverSFTP com.appiancorp.suiteapi.process.exceptions.SmartServiceException: userMsg[error.sftp_conn=Error establishing SFTP connection. Confirm your hostname, username and password. See application server log for more details. Error Message: Session.connect: java.io.IOException: End of IO Stream Read] at com.appiancorp.suiteapi.process.exceptions.SmartServiceException$Builder.build(SmartServiceException.java:145) at com.appian.ps.plugins.sftpsmartservices.GetRemoteDirectoryContentsOverSFTP.createException(GetRemoteDirectoryContentsOverSFTP.java:203) ...................... Caused by: com.jcraft.jsch.JSchException: Session.connect: java.io.IOException: End of IO Stream Read at com.jcraft.jsch.Session.connect(Session.java:565) at com.jcraft.jsch.Session.connect(Session.java:183) at com.appian.ps.plugins.sftpsmartservices.SFTPConfig.connect(SFTPConfig.java:179) at com.appian.ps.plugins.sftpsmartservices.GetRemoteDirectoryContentsOverSFTP.run(GetRemoteDirectoryContentsOverSFTP.java:66)
Could you help us to identify the error?
This communication has been in working until last week, so we know that its not a problem with hostname/username/pw.
Thanks in advance.
Hi.
At the end we have detected the problem, and we think it could be a bug on the plugin.
The key is in the error "Caused by: com.jcraft.jsch.JSchException: Session.connect: java.io.IOException: End of IO Stream Read"
The problem is with the java library JSch. it seems that it does not follow the SSH protocol version exchange correctly.
In the following link you can see more detailed documentation:
https://support.solarwinds.com/SuccessCenter/s/article/SFTP-connection-not-established-for-legacy-Java-clients?language=en_US
Is it reasonable to expect an upgrade of the affected client's JSch library to an RFC-compliant version in new releases?