renames (to .processed) are sometimes done even if the download failed.
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                 Key: CAMEL-2817
                 URL: https://issues.apache.org/activemq/browse/CAMEL-2817
             Project: Apache Camel
          Issue Type: Bug
          Components: camel-ftp
    Affects Versions: 2.1.0
         Environment: linux, apache ftp server.
            Reporter: Karl Palsson


I have an ftp consumer endpoint URI like: 
{{ftp://conaxt...@localhost:2121/autreq/ok?passiveMode=true&password=conaxTest&move=.processed&delay=5000}}

>From my ftp server logs, I can see files being downloaded, and then renamed...
{quote}
[org.apache.ftpserver.command.impl.RETR:pool-2-thread-56] - <File downloaded 
/autreq/ok/vp006331.emm>
[org.apache.ftpserver.command.impl.RETR:pool-2-thread-56] - <File downloaded 
/autreq/ok/vp006332.emm>
[org.apache.ftpserver.impl.DefaultFtpHandler:pool-2-thread-57] - <Session idle, 
closing>
[org.apache.ftpserver.command.impl.RNTO:pool-2-thread-56] - <File rename from 
"/autreq/ok/vp006331.emm" to "/autreq/ok/.processed/vp006331.emm">
[org.apache.ftpserver.command.impl.RNTO:pool-2-thread-54] - <File rename from 
"/autreq/ok/vp006332.emm" to "/autreq/ok/.processed/vp006332.emm">
[org.apache.ftpserver.command.impl.RNTO:pool-2-thread-54] - <File rename from 
"/autreq/ok/vp006333.emm" to "/autreq/ok/.processed/vp006333.emm">
{quote}

Note, that vp006333.emm is renamed, but was never downloaded.  There's no other 
mention of the file in my logs.  On the camel ftp consumer side, I see that 
camel attempted to download the file, but ended up with a null...

{quote}
[is.vf.conan.conax.FileParser:Camel thread 7: seda://updateOk] - <handling: 
GenericFile[vp006331.emm]>
[is.vf.conan.ConanCore:Camel thread 7: seda://updateOk] - <updating operation 
txid:006331 with the results: OK>
[is.vf.conan.conax.FileParser:Camel thread 7: seda://updateOk] - <handling: 
GenericFile[vp006332.emm]>
[is.vf.conan.ConanCore:Camel thread 7: seda://updateOk] - <updating operation 
txid:006332 with the results: OK>
[is.vf.conan.conax.FileParser:Camel thread 7: seda://updateOk] - <handling: 
GenericFile[vp006333.emm]>
[is.vf.conan.conax.FileParser:Camel thread 7: seda://updateOk] - <Requested 
parse of an empty file!>
{quote}

The "requested parse of an empty file" is logged when 
{{ex.getIn().getBody(String.class)}} is empty or blank for the file object.

I had a look through the bugs fixed for 2.3.0, but I don't see anything that 
would be related to this at all.


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