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From YunHee Kang <yunh.k...@gmail.com>
Subject Re: The problem occurred when downloading a file by using a protocol "sftp" in pushpull
Date Mon, 06 Aug 2012 08:28:00 GMT
Hi Brian,

I just have fixed  the problem I had related with sftp protocol in
pushpull framework.
To fix it, I just added the following statement in the method
connect() in the file JschSftpProtocol.java.
session.setConfig("StrictHostKeyChecking", "no");

You can get more details about the above statement  in the following:
http://www.mail-archive.com/jsch-users@lists.sourceforge.net/msg00393.html

Thanks,
Yunhee




2012/8/6 YunHee Kang <yunh.kang@gmail.com>:
> Hi Brian,
>
> I tried to download a file with sftp protocol in pushpull framework
> and got two warnings and a severe error message as follows:
> WARNING: Error occurred while connecting to RemoteSite: alias =
> 'SCPTESL2CO2'  url = 'sftp://agent.bu.ac.kr'  username = 'yhkang'
> cdTestDir = 'null' maxConnections = '-1' : Failed to connect to host
> agent.bu.ac.kr : reject HostKey: agent.bu.ac.kr
> Aug 6, 2012 2:13:48 PM
> org.apache.oodt.cas.pushpull.protocol.ProtocolHandler
> getAppropriateProtocolBySite
> WARNING: ProtocolFactory
> org.apache.oodt.cas.protocol.sftp.JschSftpProtocolFactory is not
> compatible with server at sftp://agent.bu.ac.kr
> Aug 6, 2012 2:13:48 PM
> org.apache.oodt.cas.pushpull.retrievalsystem.RetrievalSetup
> retrieveFiles
> SEVERE: Failed to finish downloading per property files
> /home/yhkang/oodt-0.5/cas-pushpull/etc/examples/DirStructXmlParserFiles/SCPTESL2CO2.xml
> : Failed to get appropriate protocol for RemoteSite: alias =
> 'SCPTESL2CO2'  url = 'sftp://agent.bu.ac.kr'  username = 'yhkang'
> cdTestDir = 'null' maxConnections = '-1'
> org.apache.oodt.cas.protocol.exceptions.ProtocolException: Failed to
> get appropriate protocol for RemoteSite: alias = 'SCPTESL2CO2'  url =
> 'sftp://agent.bu.ac.kr'  username = 'yhkang' cdTestDir = 'null'
> maxConnections = '-1'
>         at org.apache.oodt.cas.pushpull.protocol.ProtocolHandler.getAppropriateProtocolBySite(ProtocolHandler.java:166)
>         at org.apache.oodt.cas.pushpull.retrievalsystem.FileRetrievalSystem.changeToDir(FileRetrievalSystem.java:304)
>         at org.apache.oodt.cas.pushpull.retrievalmethod.RemoteCrawler.processPropFile(RemoteCrawler.java:104)
>         at org.apache.oodt.cas.pushpull.retrievalsystem.RetrievalSetup.retrieveFiles(RetrievalSetup.java:109)
>         at org.apache.oodt.cas.pushpull.daemon.Daemon$1.run(Daemon.java:218)
>         at java.lang.Thread.run(Thread.java:662)
> Aug 6, 2012 2:13:48 PM org.apache.oodt.cas.pushpull.daemon.Daemon$1 run
> INFO: Daemon with ID = 90121 on RMI registry port 9012 is shutting down
>
> I think the warning message is related with an exception occurred in
> the method  connect() of  JschSftpClient.java:
> protected void connect(String host, final String username,
>       final String password) throws ProtocolException {
>     try {
>       System.out.println(System.getProperty("user.home") + "/.ssh/known_hosts");
>       jsch.setKnownHosts(System.getProperty("user.home") + "/.ssh/known_hosts");
>       session = jsch.getSession(username, this.getRemoteSite().getURL()
>           .getHost(), 22);
>       session.setPassword(password);
>       session.connect();
>       sftpChannel = (ChannelSftp) session.openChannel("sftp");
>       sftpChannel.connect();
>     } catch (Exception e) {
>       throw new ProtocolException("Failed to connect to host " + host + " : "
>           + e.getMessage());
>     }
>   }
>
> I make sure that there is no problem  when downloading  a file by  scp
> command  without any password as follows:
> scp yhkang@agent.bu.ac.kr://home/yhkang/oodt-0.5/TL2CO2N.005/2004.09.20/TES-Aura_L2-CO2-Nadir_r0000002147_F06_09.he5
> .
> TES-Aura_L2-CO2-Nadir_r0000002147_F06_09.he5  100%   88MB  87.9MB/s   00:01
>
> Let me know how to fix the problem.
>
> Thanks,
> Yunhee

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