MykhailoVlakh created CAMEL-12631:
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Summary: SFTP: Socket timeout overwrites Server Alive Interval
Key: CAMEL-12631
URL: https://issues.apache.org/jira/browse/CAMEL-12631
Project: Camel
Issue Type: Bug
Components: camel-sftp
Affects Versions: 2.14.3, 2.22.0
Reporter: MykhailoVlakh
If SFTP connection settings include both soTimeout and serverAliveInterval the
connection keep alive feature does not work as instead of sending keep alive
message every serverAliveInterval milliseconds it waits soTimeout milliseconds
which is usually much longer delay. As a result server may close the connection
as idle and it is unclear why this happened.
h4. Issue details
When we set serverAliveInterval JSCH uses that setting as socket timeout (see
com.jcraft.jsch.Session.setServerAliveInterval) in order to get IO exception
and send a keep alive message on regular basis (see
com.jcraft.jsch.Session.run()). The problem is that when an sftp session is
created
(org.apache.camel.component.file.remote.SftpOperations.createSession(RemoteFileConfiguration))
camel first sets serverAliveInterval and then sets socket timeout that
overwrites the value set by serverAliveInterval setter.
In order to fix this issue it is required to make sure that if
serverAliveInterval is set socket timeout is not changed even if provided or
as an alternative at least a warning should be logged to clarify what is going
on.
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