[NIFI-7443] SFTP KeepAlive not working

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.10.0, 1.11.0, 1.12.0, 1.13.0, 1.14.0
• Fix Version/s: 1.15.0
• Component/s: Extensions
• Labels: security
• Assignee: David Handermann
• Reporter: Truong Duc Kien
• Created: 13/May/20 08:41
• Updated: 20/Dec/21 16:43
• Resolved: 19/Jul/21 18:28

Description

Since NiFi switch to use SSHJ for its SFTP client implementation, the Keep Alive feature stop working.

In order to start the KeepAlive thread, SSHJ requires the user to set a keep alive interval. NiFi currently doesn't do this.

Issue Links

• fixes: NIFI-7455 FetchSFTP failed to close SFTPClient
• relates to: NIFI-9507 FetchSFTP spawns multiple keep-alive threads on failed connections
• links to: GitHub Pull Request #5223