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