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https://issues.apache.org/jira/browse/CAMEL-4010?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13144680#comment-13144680
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Claus Ibsen commented on CAMEL-4010:
------------------------------------
The ftp consumer is not thread safe, we should possible force the ftp consumer
to run synchronously.
> Camel FTP component fails to process multiple files at once from a specified
> folder
> -----------------------------------------------------------------------------------
>
> Key: CAMEL-4010
> URL: https://issues.apache.org/jira/browse/CAMEL-4010
> Project: Camel
> Issue Type: Bug
> Components: camel-ftp
> Affects Versions: 2.6.0
> Environment: Camel 2.6.0-fuse-0.1-0.9
> Running in ServiceMix
> Java 1.6
> Reporter: Laurentiu Trica
> Fix For: 2.9.0
>
> Attachments: test-camel-ftp.zip
>
>
> Camel FTP component fails to process multiple files at once from a specified
> folder (let's assume the folder is /in).
> When the consumer connects to a ftp account and finds a list of, let's say, 3
> files, it will try to retrieve them in parallel but this is not handled
> properly.
> As you can see from the below FTP server log, this is what Camel FTP does:
> - it changes the current directory to /in
> - retrieves the file
> - it changes the current directory to /
> - the second (probably) thread changes the directory to /in
> - retreives the second file
> - the first (probably) thread sends a delete command but it sends it as if it
> were in the root folder but it is actually in the /in folder
> - the FTP gives an error that the file doesn't exist
> - somehow the FTP Component blocks itself on the first file...
> See my comments in the following log starting with *****
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> 257 "/" is current
> directory.
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> CWD in
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> 250 CWD
> successful. "/in" is current directory.
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> PASV
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> 227 Entering
> Passive Mode (192,168,0,25,228,206)
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> RETR WS_1001_1.xml
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> 150 Connection
> accepted
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> SSL connection for
> data connection established
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> 226 Transfer OK
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> CWD /
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> 250 CWD
> successful. "/" is current directory.
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> PWD
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> 257 "/" is current
> directory.
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> CWD in
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> 250 CWD
> successful. "/in" is current directory.
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> PASV
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> 227 Entering
> Passive Mode (192,168,0,25,228,207)
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> RETR WS_1001_2.xml
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> 150 Connection
> accepted
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> DELE
> in/WS_1001_1.xml ***** The location is already /in, should be DELE
> WS_1001_1.xml
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> 550 File not found
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> PASV
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> 227 Entering
> Passive Mode (192,168,0,25,228,208)
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> NLST in
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> 550 Directory not
> found
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> PWD
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> 257 "/in" is
> current directory.
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> CWD in
> ***** Current directory is already /in
> (002386)5/20/2011 17:07:03 PM - sftp-test (192.168.0.194)> 550 CWD failed.
> "/in/in": directory not found.
> For the whole FTP server logs go here:
> http://pastie.org/private/kknnkxpbyzqmai7gsm8z5g
> For the Servicemix/Camel(Trace) log:
> http://pastie.org/private/eulookxiepan3nkjyu41a
> A workaround that seems to work is to use the maxMessagesPerPoll=1 option.
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