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https://issues.apache.org/jira/browse/NIFI-5764?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16667931#comment-16667931
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Koji Kawamura commented on NIFI-5764:
-------------------------------------
For reference about what ControlMaster is, from $ man ssh_config:
{quote}
ControlMaster
Enables the sharing of multiple sessions over a single network connection.
When set to yes, ssh(1) will listen for connections on a control socket
specified using the ControlPath argument. Additional sessions can connect to
this socket using the same ControlPath with ControlMaster set to no (the
default). These sessions will try to reuse the master instance's network
connection rather than initiating new ones, but will fall back to connecting
normally if the control socket does not exist, or is not listening.
Setting this to ask will cause ssh(1) to listen for control connections, but
require confirmation using ssh-askpass(1). If the ControlPath cannot be
opened, ssh(1) will continue without connecting to a master instance.
X11 and ssh-agent(1) forwarding is supported over these multiplexed
connections, however the display and agent forwarded will be the one belonging
to the master connec- tion i.e. it is not possible to forward multiple displays
or agents.
Two additional options allow for opportunistic multiplexing: try to use a
master connection but fall back to creating a new one if one does not already
exist. These options are: auto and autoask. The latter requires confirmation
like the ask option.
{quote}
> Allow ListSftp connection parameter
> -----------------------------------
>
> Key: NIFI-5764
> URL: https://issues.apache.org/jira/browse/NIFI-5764
> Project: Apache NiFi
> Issue Type: Wish
> Components: Extensions
> Affects Versions: 1.6.0
> Reporter: dav
> Priority: Critical
> Labels: SFTP, customization, sftp
>
> ListSftp and other Sftp processors should be able to add parameters
> (like [-B buffer_size] [-b batchfile] [-c cipher]
> [-D sftp_server_path] [-F ssh_config] [-i identity_file] [-l limit]
> [-o ssh_option] [-P port] [-R num_requests] [-S program]
> [-s subsystem | sftp_server] host
> sftp [user@]host[:file ...]
> sftp [user@]host[:dir[/]]
> sftp -b batchfile [user@]host)
> in order to edit the type of connection on Sftp Server.
> For instance, I have this error on nifi:
> 2018-10-29 11:06:09,462 ERROR [Timer-Driven Process Thread-5]
> SimpleProcessLogger.java:254
> ListSFTP[id=766ac418-27ce-335a-5b13-52abe3495592] Failed to perform listing
> on remote host due to java.io.IOException: Failed to obtain connection to
> remote host due to com.jcraft.jsch.JSchException: Auth fail: {}
> java.io.IOException: Failed to obtain connection to remote host due to
> com.jcraft.jsch.JSchException: Auth fail
> at
> org.apache.nifi.processors.standard.util.SFTPTransfer.getChannel(SFTPTransfer.java:468)
> at
> org.apache.nifi.processors.standard.util.SFTPTransfer.getListing(SFTPTransfer.java:192)
> at
> org.apache.nifi.processors.standard.util.SFTPTransfer.getListing(SFTPTransfer.java:156)
> at
> org.apache.nifi.processors.standard.ListFileTransfer.performListing(ListFileTransfer.java:105)
> at
> org.apache.nifi.processor.util.list.AbstractListProcessor.onTrigger(AbstractListProcessor.java:401)
> at
> org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:27)
> at
> org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1147)
> at
> org.apache.nifi.controller.tasks.ConnectableTask.invoke(ConnectableTask.java:175)
> at
> org.apache.nifi.controller.scheduling.QuartzSchedulingAgent$2.run(QuartzSchedulingAgent.java:140)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
> 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:748)
> Caused by: com.jcraft.jsch.JSchException: Auth fail
> at com.jcraft.jsch.Session.connect(Session.java:519)
> at com.jcraft.jsch.Session.connect(Session.java:183)
> at
> org.apache.nifi.processors.standard.util.SFTPTransfer.getChannel(SFTPTransfer.java:448)
> ... 15 common frames omitted
> This can be avoided by connect to Sftp server with this string:
> *sftp -o “controlmaster auto” username@sftp_server*
>
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