Potential bug in sFTP (jSCH)?

Hi,

I am using Camel 2.12.0.
I have a route that establishes a sFTP connection.
I have set the route so that it will attempt to re-connect every 15 minutes
and then disconnect.
This is set up because the sFTP service provider has explicitly requested
not to keep connection open and poll at regular intervals.

<route id="emir_sftpDTCCToReform5" reform:name="Emir Messages from DTCC
SFTP5" reform:systemName="Emir Messages from DTCC SFTP5">
<from
uri=ꫪ;sftp://${emir.dtcc.sftp.user}@${emir.dtcc.sftp.url}///DTS4.DOWN.G5${emir.gtr.OriginatorId}?filter=#sftpFilter橪;amp;disconnect=true橪;amp;idempotent=true橪;amp;idempotentRepository=#jpaStore橪;amp;password=${emir.dtcc.sftp.password}橪;amp;binary=true橪;amp;delay=900000橪;amp;stepwise=false橪;amp;;i>maximumReconnectAttempts=0"/>
<setHeader headerName="messageType">
<simple>SFTPDTCC</simple>
</setHeader>

<to uri="jms:queue:queue.incomingEvents"/>
</route>

The connection works fine as expected but I see the following in the log
every time the route disconnects

[2014-06-24 18:57:25,300 Camel (camel) thread #133 -
sftp://F7DGTLRW [ at ] 207.45.41.162:22///DTS4.DOWN.G5TLR] SftpConsumer
INFO Connecte
d and logged in to: sftp://F7DGTLRW [ at ] 207.45.41.162:22
[2014-06-24 18:57:25,707 Camel (camel) thread #133 -
sftp://F7DGTLRW [ at ] 207.45.41.162:22///DTS4.DOWN.G5TLR] SftpOperations
INFO JSCH ->
Disconnecting from 207.45.41.162 port 22
[2014-06-24 18:57:25,708 Connect thread 207.45.41.162 session]
SftpOperations INFO JSCH -> Caught an exception, leaving
main loop due
to socket closed

I am trying to set the log to debug level - but I am unable to change the
log level for jSCH component to get debug.

I have tried setting
log4j.logger.org.apache.camel.component.jsch=DEBUG
But this has no effect.

Has anyone else had this problem - I do not see this as a show stopper -
since the route reconnects as expected but I am concerned that there could
be stale ssh sessions left open.

Can some one advise on how to tackle this?

regards