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From ├ľnder Sezgin (JIRA) <j...@apache.org>
Subject [jira] [Commented] (CAMEL-11754) Apache Camel FTP getting Cannot retrieve file: RemoteFile error
Date Sat, 09 Sep 2017 22:27:02 GMT

    [ https://issues.apache.org/jira/browse/CAMEL-11754?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16160090#comment-16160090
] 

├ľnder Sezgin commented on CAMEL-11754:
--------------------------------------

As an initial look SFTP uses jcraft's library and using it, as you already mentioned there
is no issue, because behind the scene jcraft works with absolute paths all the time. 
ftp and file components you may have run into such issue because they both work with absolute
and relative paths. i think here if you don't use {{recursive=true}} option, this error is
correct and if you use it, you would not expect such issue.
I'll try to look closer.
You can do PR if you can (with possible unit test.) that would be perfect.

> Apache Camel FTP getting Cannot retrieve file: RemoteFile error
> ---------------------------------------------------------------
>
>                 Key: CAMEL-11754
>                 URL: https://issues.apache.org/jira/browse/CAMEL-11754
>             Project: Camel
>          Issue Type: Bug
>          Components: camel-ftp
>    Affects Versions: 2.19.0
>         Environment: Windows 10 x64
> jdk1.8.0_131
> Camel 2.19.0
>            Reporter: dheitzer
>
> I'm receiving an error from the FTP Component when its processing files in Camel 2.19.0.
> I'm trying to retrieve files using the Camel FTP component (Camel 2.19.0):
> from("ftp://my.host.com:21/my/relative/directory?download=true&stepwise=false&delete=false")
> {code:java}
> org.apache.camel.component.file.GenericFileOperationFailedException: Cannot retrieve
file: RemoteFile[my/relative/directory/file1.txt] from: ftp://my.host.com:21/my/relative/directory?delete=false&download=true&stepwise=false
>     at org.apache.camel.component.file.GenericFileConsumer.processExchange(GenericFileConsumer.java:427)
>     at org.apache.camel.component.file.remote.RemoteFileConsumer.processExchange(RemoteFileConsumer.java:137)
>     at org.apache.camel.component.file.GenericFileConsumer.processBatch(GenericFileConsumer.java:218)
>     at org.apache.camel.component.file.GenericFileConsumer.poll(GenericFileConsumer.java:182)
>     at org.apache.camel.impl.ScheduledPollConsumer.doRun(ScheduledPollConsumer.java:174)
>     at org.apache.camel.impl.ScheduledPollConsumer.run(ScheduledPollConsumer.java:101)
>     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>     at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
>     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
>     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
>     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>     at java.lang.Thread.run(Thread.java:748)
> {code}
> From the TRACE logs, I can see that Camel is listing the files in the directory correctly:
> {code:java}
> [TRACE] 2017-09-05 11:40:49,438 org.apache.camel.component.file.remote.FtpConsumer -
Polling directory: my/relative/directory
> [TRACE] 2017-09-05 11:40:51,748 org.apache.camel.component.file.remote.FtpOperations
- listFiles(my/relative/directory)
> [TRACE] 2017-09-05 11:40:58,657 org.apache.camel.component.file.remote.FtpConsumer -
Found 3 in directory: my/relative/directory
> [TRACE] 2017-09-05 11:40:58,657 org.apache.camel.component.file.remote.FtpConsumer -
FtpFile[name=/absolute/path/to/directory/file1.txt, dir=false, file=true]
> [TRACE] 2017-09-05 11:40:58,657 org.apache.camel.component.file.remote.FtpConsumer -
FtpFile[name=/absolute/path/to/directory/file2.txt, dir=false, file=true]
> [TRACE] 2017-09-05 11:40:58,657 org.apache.camel.component.file.remote.FtpConsumer -
FtpFile[name=/absolute/path/to/directory/file3.txt, dir=false, file=true]
> {code}
> When Camel tries to process each file however, it appears to be prepending the relative
directory to the absolute directory and failing to find the resulting garbled path:
> {code:java}
> [TRACE] 2017-09-05 11:40:59,417 org.apache.camel.component.file.remote.FtpConsumer -
Processing file: RemoteFile[absolute/path/to/directory/file1.txt]
> [TRACE] 2017-09-05 11:40:59,418 org.apache.camel.component.file.remote.FtpConsumer -
Retrieving file: my/relative/directory//absolute/path/to/directory/file1.txt from: ftp://my.host.com:21/my/relative/directory?delete=false&download=true&stepwise=false
> [TRACE] 2017-09-05 11:40:59,418 org.apache.camel.component.file.remote.FtpOperations
- retrieveFile(my/relative/directory//absolute/path/to/directory/file1.txt)
> [TRACE] 2017-09-05 11:40:59,418 org.apache.camel.component.file.remote.FtpOperations
- Client retrieveFile: my/relative/directory//absolute/path/to/directory/file1.txt
> [WARN ] 2017-09-05 11:40:59,518 org.apache.camel.component.file.remote.FtpConsumer -
Error processing file RemoteFile[absolute/path/to/directory/file1.txt] due to Cannot retrieve
file: RemoteFile[absolute/path/to/directory/file1.txt] from: ftp://my.host.com:21/my/relative/directory?delete=false&download=true&stepwise=false
> {code}
> This path in the logs constructed by the FTPComponent is incorrect:
> {noformat}
> Retrieving file: my/relative/directory//absolute/path/to/directory/file1.txt
> {noformat}
> I debugged the Camel FTP consumer and it looks like
> [on line 238 is where the relative path is getting prepended to the absolute path|https://github.com/apache/camel/blob/camel-2.19.x/components/camel-ftp/src/main/java/org/apache/camel/component/file/remote/FtpConsumer.java#L238]
> Interestingly enough, [the SFTP component is doing the same thing|https://github.com/apache/camel/blob/camel-2.19.x/components/camel-ftp/src/main/java/org/apache/camel/component/file/remote/SftpConsumer.java#L208]
however it is working because 
> {code:java}
> RemoteFileOperations<ChannelSftp.LsEntry>
> {code}
>  does not set filename as an absolute path but 
> {code:java}
> RemoteFileOperations<FTPFile>
> {code}
>  does.
> Does anyone have any suggestions to work around this to get the FTP Conponent to consume
the files? or am I doing something incorrectly?
> I'm using Camel 2.19.0



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