SFTP producer cannot delete the exesting donefilename

Hi,

I am facing issue with Sftp producer while using done file name option with stepwise option as false. Previously it was not creating the done files in SFTP destination, I googled and found the solution to make stepwise as true and it works and created the done file

stepwise=false doesnot create done file.
stepwise=true creates the done file. File processed test.txt, in sftp destination two files created test.txt, and test.txt.done.

but when the route is restarted and same file(test.txt) is passed which processed earlier, sftp and tries to delete the existing done file(test.txt.done) but fails to delete and throws the following exception
GenericFileOperationFailedException("Cannot delete existing done file: " + doneFileName);

Below is the camel route:

from("sftp://my.comp.com:22/sftp?username=test&password=test123&idempotent=true").process(new Processor() {

@Override
public void process(Exchange exchange) throws Exception {
System.out.println("test");

}).to("sftp://my.comp.com:22/sftpDest?username=test&password=test123&doneFileName=${file:name}.done&stepwise=true&chmod=777");

Camel version used is camel-2.9.0.

Please help.

Thanks & Regards,
Shadab

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