I am using Director 4.7.0
I have been getting intermittent errors on connecting to SFTP server:
I am able to recover on the next run, but it is annoying. Is there any fix for it?

3/8/16 9:20:16 AM ERROR [8098 - List Files at source] channel is not opened.
com.linoma.dpa.runtime.JobFailedException: [8098 - List Files at source] channel is not opened.
at com.linoma.dpa.runtime.Job.run(Unknown Source)
at com.linoma.dpa.util.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at com.linoma.dpa.util.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: com.linoma.dpa.ExecutionException: [8098 - List Files at source] channel is not opened.
at com.linoma.dpa.ProjectUtilities.getExecutionException(Unknown Source)
at com.linoma.dpa.tasks.ftp.AbstractFTPTask.createFTPConnection(Unknown Source)
at com.linoma.dpa.tasks.ftp.AbstractFTPTask.execute(Unknown Source)
at com.linoma.dpa.Module.execute(Unknown Source)
at com.linoma.dpa.Project.execute(Unknown Source)
at com.linoma.dpa.runtime.Job.executeProject(Unknown Source)
... 4 more
Caused by: com.linoma.dpa.tasks.ftp.FTPInterfaceException: channel is not opened.
at com.linoma.dpa.tasks.ftp.SFTPImpl.connect(Unknown Source)
at com.linoma.dpa.tasks.ftp.SFTPImpl.connectAndLogin(Unknown Source)
... 9 more
Caused by: com.jcraft.jsch.JSchException: channel is not opened.
at com.jcraft.jsch.Channel.sendChannelOpen(Unknown Source)
at com.jcraft.jsch.Channel.connect(Unknown Source)
at com.jcraft.jsch.Channel.connect(Unknown Source)
at com.linoma.dpa.tasks.ftp.SFTPImpl.establishSFTPConnection(Unknown Source)
... 11 more


Thank you,
Ken

You can look at modifying your retries and retry intervals. Also, look at your time out value. You could possibly increase that value as well.