[NIFI-7243] SFTP Processors - Exhausted available authentication methods

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 1.10.0, 1.11.0, 1.11.1, 1.11.3
• Fix Version/s: 1.13.0
• Component/s: Extensions
• Labels: SFTP listsftp
• Environment: PRO
• Assignee: David Handermann
• Reporter: Raúl
• Created: 10/Mar/20 15:43
• Updated: 11/Sep/23 16:52
• Resolved: 21/Jan/21 17:24

Description

In version 1.8 this works correctly. In superiors no.

 

Any of the processors: ListSFTP, FetchSFTP, GetSFTP, PutSFTP when connecting to an sftp shows the error:

2020-03-10 15:12:51,596 ERROR [Timer-Driven Process Thread-3] o.a.nifi.processors.standard.ListSFTP ListSFTP[id=af72555e-0170-1000-c80d-7e992c9de544] Failed to perform listing on remote host due to Exhausted available authentication methods: net.schmizz.sshj.userauth.UserAuthException: Exhausted available authentication methods
net.schmizz.sshj.userauth.UserAuthException: Exhausted available authentication methods
at net.schmizz.sshj.SSHClient.auth(SSHClient.java:230)

 

These tests that I commented have been made from nifi, both in windows and linux environment and fails in both.

   1 - Strict Host Key Checking: false

   2 - Strict Host Key Checking: true

        Host Key File: C:\Users\usuario\.ssh\known_hosts --> (ssh-rsa, ssh-dss and ecdsa-sha2-nistp256)

 

From the machines, both in windows and in linux, if an sftp is made from the command line it connects without problems. But with Nifi he fails to connect.

 

Any idea about how can I resolve this error? 

 

Thank you in advance,

-------------------------------------------- log -------------------------------------------------

2020-03-10 15:12:51,596 ERROR [Timer-Driven Process Thread-3] o.a.nifi.processors.standard.ListSFTP ListSFTP[id=af72555e-0170-1000-c80d-7e992c9de544] Failed to perform listing on remote host due to Exhausted available authentication methods: net.schmizz.sshj.userauth.UserAuthException: Exhausted available authentication methods2020-03-10 15:12:51,596 ERROR [Timer-Driven Process Thread-3] o.a.nifi.processors.standard.ListSFTP ListSFTP[id=af72555e-0170-1000-c80d-7e992c9de544] Failed to perform listing on remote host due to Exhausted available authentication methods: net.schmizz.sshj.userauth.UserAuthException: Exhausted available authentication methodsnet.schmizz.sshj.userauth.UserAuthException: Exhausted available authentication methods at net.schmizz.sshj.SSHClient.auth(SSHClient.java:230) at org.apache.nifi.processors.standard.util.SFTPTransfer.getSFTPClient(SFTPTransfer.java:606) at org.apache.nifi.processors.standard.util.SFTPTransfer.getListing(SFTPTransfer.java:233) at org.apache.nifi.processors.standard.util.SFTPTransfer.getListing(SFTPTransfer.java:196) at org.apache.nifi.processors.standard.ListFileTransfer.performListing(ListFileTransfer.java:106) at org.apache.nifi.processors.standard.ListSFTP.performListing(ListSFTP.java:146) at org.apache.nifi.processor.util.list.AbstractListProcessor.listByTrackingTimestamps(AbstractListProcessor.java:472) at org.apache.nifi.processor.util.list.AbstractListProcessor.onTrigger(AbstractListProcessor.java:414) at org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:27) at org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1176) at org.apache.nifi.controller.tasks.ConnectableTask.invoke(ConnectableTask.java:213) at org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:117) at org.apache.nifi.engine.FlowEngine$2.run(FlowEngine.java:110) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) 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)2020-03-10 15:12:51,601 DEBUG [Timer-Driven Process Thread-3] o.a.nifi.processors.standard.ListSFTP ListSFTP[id=af72555e-0170-1000-c80d-7e992c9de544] has chosen to yield its resources; will not be scheduled to run again for 1000 milliseconds2020-03-10 15:12:51,603 TRACE [Timer-Driven Process Thread-3] o.a.n.c.r.StandardProcessSession StandardProcessSession[id=0] checkpointed, but no events were performed by this ProcessSession

Issue Links

• is duplicated by: NIFI-7451 SFTP is failing to connect to Remote host
• links to: GitHub Pull Request #4774