SFTP Smart Services

Hi Author,

Has recently there been changes to the 'Send File Over SFTP' smart service with the latest version of the plugin?

When I upgraded the plugin from 1.6.2 to 2.2.2 then the 'Send File Over SFTP' smart service started failing for no reason. And the interesting thing is smart service node passes without any error and the file is not placed onto the SFTP location.

And when I check logs the following is the error:

[Appian Work Item - 16520 - WorkID 208 - execution00 - process 169537 - model 10914 : UnattendedJavaActivityRequest] ERROR com.appian.ps.plugins.sftpsmartservices.SendFileOverSFTP - Error transferring file to SFTP server 2: The system cannot find the path specified.     at com.jcraft.jsch.ChannelSftp.throwStatusError(ChannelSftp.java:2873)

Hi jvandenbranden - we are experiencing this issue as well where files are being copied over at "0" size when there is actual data in appian. We are being returned with "Input stream is closed" error. Your issue seems to be similar with out findings. Can you confirm if you were able to find a solution to this? We are currently on 2.2.1 version of SFTP Functions

Hi Ivan, 

We have been experiencing similar issues regarding small files being transferred, and if we have larger files, long wait times before "input stream is closed" errors being returned. Did you happen to find a solution to this? 

Thank you kindly for your help in advanced. 

Hello Team - We are using "Send file over SFTP" node and it's returning following errors.. FYI, on same environment with different SFG gateway ID we are using "Receive file over SFTP" which is working fine.. however with sending file it's an error. Any help and pointer in right direction would be much appreciated.. Something changed with latest version?

2022-10-20 05:15:26,584 [Appian Work Item - 148246 - WorkID 226 - execution01 - process 268492854 - model 10687 : UnattendedJavaActivityRequest] ERROR com.appian.ps.plugins.sftpsmartservices.SendFileOverSFTP - Error connecting to remote SFTP server
com.jcraft.jsch.JSchException: java.io.IOException: channel is broken
	at com.jcraft.jsch.ChannelSftp.start(ChannelSftp.java:315)
	at com.jcraft.jsch.Channel.connect(Channel.java:152)
	at com.jcraft.jsch.Channel.connect(Channel.java:145)
	at com.appian.ps.plugins.sftpsmartservices.SFTPConfig.connect(SFTPConfig.java:182)
	at com.appian.ps.plugins.sftpsmartservices.SendFileOverSFTP.run(SendFileOverSFTP.java:141)
	at com.appiancorp.process.runtime.framework.DefaultActivityExecutor$1.lambda$call$0(DefaultActivityExecutor.java:136)
	at com.appiancorp.plugins.PluginUsageLogger.runWithPluginInformation(PluginUsageLogger.java:52)
	at com.appiancorp.process.runtime.framework.DefaultActivityExecutor$1.call(DefaultActivityExecutor.java:136)
	at com.appiancorp.process.runtime.framework.DefaultActivityExecutor$1.call(DefaultActivityExecutor.java:130)
	at com.appiancorp.common.ContextClassLoaderSwitcher.runInContext(ContextClassLoaderSwitcher.java:27)
	at com.appiancorp.process.runtime.framework.DefaultActivityExecutor.execute(DefaultActivityExecutor.java:130)
	at com.appiancorp.process.engine.UnattendedJavaActivityRequest.execute(UnattendedJavaActivityRequest.java:88)
	at com.appiancorp.process.engine.UnattendedJavaActivityRequestResponseCreator.getJavaActivityResultResponse(UnattendedJavaActivityRequestResponseCreator.java:21)
	at com.appiancorp.process.engine.UnattendedJavaActivityRequest.getJavaActivityResultResponse(UnattendedJavaActivityRequest.java:67)
	at com.appiancorp.process.engine.UnattendedJavaActivityRequest.execute0(UnattendedJavaActivityRequest.java:55)
	at com.appiancorp.common.persistence.data.AppianDataUserContextProvider.executeWithConsistentDataReads(AppianDataUserContextProvider.java:143)
	at com.appiancorp.process.engine.ProcessContinuationRequest.executeOuter(ProcessContinuationRequest.java:68)
	at com.appiancorp.process.engine.ContinuationRequest.execute(ContinuationRequest.java:129)
	at com.appiancorp.process.workpoller.UnattendedRequestHandlerBean.onMessage(UnattendedRequestHandlerBean.java:36)
	at com.appiancorp.process.workpoller.WorkItem.run(WorkItem.java:110)
	at org.springframework.jca.work.SimpleTaskWorkManager$DelegatingWorkAdapter.run(SimpleTaskWorkManager.java:239)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:750)
Caused by: java.io.IOException: channel is broken
	at com.jcraft.jsch.Session.write(Session.java:1289)
	at com.jcraft.jsch.ChannelSftp.sendINIT(ChannelSftp.java:2499)
	at com.jcraft.jsch.ChannelSftp.start(ChannelSftp.java:258)
	... 23 more
2022-10-20 05:15:26,585 [Appian Work Item - 148246 - WorkID 226 - execution01 - process 268492854 - model 10687 : UnattendedJavaActivityRequest] ERROR com.appian.ps.plugins.sftpsmartservices.SendFileOverSFTP - Error transferring file to SFTP server
4: java.io.IOException: Pipe closed
	at com.jcraft.jsch.ChannelSftp.put(ChannelSftp.java:551)
	at com.jcraft.jsch.ChannelSftp.put(ChannelSftp.java:492)
	at com.appian.ps.plugins.sftpsmartservices.SendFileOverSFTP.run(SendFileOverSFTP.java:151)
	at com.appiancorp.process.runtime.framework.DefaultActivityExecutor$1.lambda$call$0(DefaultActivityExecutor.java:136)
	at com.appiancorp.plugins.PluginUsageLogger.runWithPluginInformation(PluginUsageLogger.java:52)
	at com.appiancorp.process.runtime.framework.DefaultActivityExecutor$1.call(DefaultActivityExecutor.java:136)
	at com.appiancorp.process.runtime.framework.DefaultActivityExecutor$1.call(DefaultActivityExecutor.java:130)
	at com.appiancorp.common.ContextClassLoaderSwitcher.runInContext(ContextClassLoaderSwitcher.java:27)
	at com.appiancorp.process.runtime.framework.DefaultActivityExecutor.execute(DefaultActivityExecutor.java:130)
	at com.appiancorp.process.engine.UnattendedJavaActivityRequest.execute(UnattendedJavaActivityRequest.java:88)
	at com.appiancorp.process.engine.UnattendedJavaActivityRequestResponseCreator.getJavaActivityResultResponse(UnattendedJavaActivityRequestResponseCreator.java:21)
	at com.appiancorp.process.engine.UnattendedJavaActivityRequest.getJavaActivityResultResponse(UnattendedJavaActivityRequest.java:67)
	at com.appiancorp.process.engine.UnattendedJavaActivityRequest.execute0(UnattendedJavaActivityRequest.java:55)
	at com.appiancorp.common.persistence.data.AppianDataUserContextProvider.executeWithConsistentDataReads(AppianDataUserContextProvider.java:143)
	at com.appiancorp.process.engine.ProcessContinuationRequest.executeOuter(ProcessContinuationRequest.java:68)
	at com.appiancorp.process.engine.ContinuationRequest.execute(ContinuationRequest.java:129)
	at com.appiancorp.process.workpoller.UnattendedRequestHandlerBean.onMessage(UnattendedRequestHandlerBean.java:36)
	at com.appiancorp.process.workpoller.WorkItem.run(WorkItem.java:110)
	at org.springframework.jca.work.SimpleTaskWorkManager$DelegatingWorkAdapter.run(SimpleTaskWorkManager.java:239)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:750)
Caused by: java.io.IOException: Pipe closed
	at java.io.PipedInputStream.read(PipedInputStream.java:307)
	at com.jcraft.jsch.Channel$MyPipedInputStream.updateReadSide(Channel.java:362)
	at com.jcraft.jsch.ChannelSftp.put(ChannelSftp.java:515)
	... 21 more

Hello. 

Have you had the opportunity to look into this issue? Seems to be a common item among many Plug-In users. Please advise if so, thank you. 

Hi,

We are using 'Receive File Over SFTP' node as MNI and it is showing error intermittently as connection timeout, few files are getting transferred  but for one of file it fails, even though SFTP application is up and not having any connection issue.

Below is the error:

com.jcraft.jsch.JSchException: java.net.ConnectException: Connection timed out (Connection timed out)
	at com.jcraft.jsch.Util.createSocket(Util.java:349)
	at com.jcraft.jsch.Session.connect(Session.java:215)
	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)
	at com.appiancorp.process.runtime.framework.DefaultActivityExecutor$1.lambda$call$0(DefaultActivityExecutor.java:136)
	at com.appiancorp.plugins.PluginUsageLogger.runWithPluginInformation(PluginUsageLogger.java:52)
	at com.appiancorp.process.runtime.framework.DefaultActivityExecutor$1.call(DefaultActivityExecutor.java:136)
	at com.appiancorp.process.runtime.framework.DefaultActivityExecutor$1.call(DefaultActivityExecutor.java:130)
	at com.appiancorp.common.ContextClassLoaderSwitcher.runInContext(ContextClassLoaderSwitcher.java:27)
	at com.appiancorp.process.runtime.framework.DefaultActivityExecutor.execute(DefaultActivityExecutor.java:130)
	at com.appiancorp.process.engine.UnattendedJavaActivityRequest.execute(UnattendedJavaActivityRequest.java:88)
	at com.appiancorp.process.engine.UnattendedJavaActivityRequestResponseCreator.getJavaActivityResultResponse(UnattendedJavaActivityRequestResponseCreator.java:21)
	at com.appiancorp.process.engine.UnattendedJavaActivityRequest.getJavaActivityResultResponse(UnattendedJavaActivityRequest.java:67)
	at com.appiancorp.process.engine.UnattendedJavaActivityRequest.execute0(UnattendedJavaActivityRequest.java:55)
	at com.appiancorp.common.persistence.data.AppianDataUserContextProvider.executeWithConsistentDataReads(AppianDataUserContextProvider.java:143)
	at com.appiancorp.process.engine.ProcessContinuationRequest.executeOuter(ProcessContinuationRequest.java:68)
	at com.appiancorp.process.engine.ContinuationRequest.execute(ContinuationRequest.java:129)
	at com.appiancorp.process.workpoller.UnattendedRequestHandlerBean.onMessage(UnattendedRequestHandlerBean.java:36)
	at com.appiancorp.process.workpoller.WorkItem.run(WorkItem.java:110)
	at org.springframework.jca.work.SimpleTaskWorkManager$DelegatingWorkAdapter.run(SimpleTaskWorkManager.java:239)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:750)
Caused by: java.net.ConnectException: Connection timed out (Connection timed out)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.VPNSocketImpl.connect(VPNSocketImpl.java:50)
	at java.net.Socket.connect(Socket.java:607)
	at java.net.Socket.connect(Socket.java:556)
	at java.net.Socket.<init>(Socket.java:452)
	at java.net.Socket.<init>(Socket.java:229)
	at com.jcraft.jsch.Util.createSocket(Util.java:343)
	... 23 more
2022-12-08 15:42:12,240 [Appian Work Item - 21 - WorkID 62 - execution02 - process 53970 - model 226 : UnattendedJavaActivityRequest] ERROR com.appiancorp.process.engine.UnattendedJavaActivityRequest - An error occurred while executing activity: id=536872158, 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: java.net.ConnectException: Connection timed out (Connection timed out)]

Hi All,

We are getting the Error while using Receive File Over SFTP (Basic Credentials)

Hi Sourabh,

This issue might happen when the provided path is not available or the path doesn't have any file within it. Kindly check with the input path provided and also the folder.

Thanks.

Hello there, Can somebody please share some more documentation on connecting through ssh. How to generate ssh keys, etc. I generated keys in PuttyGen, and I am passing the ppk file while connecting, but it complains of having an invalid private key. 
Any help is much appreciated