Koji Kawamura created NIFI-4160:
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Summary: SFTPTransfer should specify connection timeout
Key: NIFI-4160
URL: https://issues.apache.org/jira/browse/NIFI-4160
Project: Apache NiFi
Issue Type: Bug
Components: Extensions
Affects Versions: 1.0.0
Reporter: Koji Kawamura
Assignee: Koji Kawamura
For FTP/SFTP, we use com.jcraft.jsch library. When XXXSFTP processor make use
of the library, there are two occasions to set connection timeout. One is
connecting a session (Socket), and the other is opening a SFTP channel.
Currently we set a connection timeout which can be specified via processor
property for connecting a session, but not for opening an SFTP channel.
Then the library uses default 10ms x 2000 retry to open the channel. With slow
SFTP servers it's possible that opening channel takes longer than 10ms, which
can cause following error:
{code}
java.io.IOException: Failed to obtain connection to remote host due to
com.jcraft.jsch.JSchException: channel is not opened
{code}
We should specify connection timeout for opening channel as well.
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