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https://issues.apache.org/jira/browse/CAMEL-10440?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15711633#comment-15711633
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Claus Paludan commented on CAMEL-10440:
---------------------------------------

Any updates on this?

> ftp component: Errors during file download bypass redelivery and goes 
> directly to the deadletterchannel 
> --------------------------------------------------------------------------------------------------------
>
>                 Key: CAMEL-10440
>                 URL: https://issues.apache.org/jira/browse/CAMEL-10440
>             Project: Camel
>          Issue Type: Bug
>          Components: camel-ftp
>    Affects Versions: 2.17.3, 2.18.0
>         Environment: Behavior verified on MS Windows 7 (Spring Boot based 
> application) and MacOS (set based on "camel-example-ftp"). 
>            Reporter: Klaus Johansen
>            Priority: Minor
>         Attachments: ConsumerPollStrategy.java, MyFtpServer.java, 
> MyFtpServerRouteBuilder.java
>
>
> When the FTP consumer is hit by an error during download of a file (eg. 
> socket timeout or because of missing read permission on the file) a 
> GenericFileOperationFailedException is thrown. Unfortunately is impossible to 
> recover from this error using redelivery because the message is forced onto 
> the deadletterchannel (marked exhausted?)
> When using consumer.bridgeErrorHandler=true redelivery works fine when the 
> errors happens during the polling phase (eg. connection timeouts and missing 
> directories).  
> When the error goes directly to the deadletterchannel the rollback method of 
> the PollingConsumerPollStrategy is never called. This makes it difficult to 
> access the consumer and force a disconnect in order to recover from the error 
> situtation (like it is done by RemoteFilePollingConsumerPollStrategy). 
> [DefaultQuartzScheduler-camel-1_Worker-1] INFO 
> org.apache.camel.example.ftp.ConsumerPollStrategy - Poll starting for 
> endpoint: 
> ftp://localhost:21/testdir?autoCreate=false&consumer.bridgeErrorHandler=true&fil...
> [DefaultQuartzScheduler-camel-1_Worker-1] DEBUG 
> org.apache.camel.component.file.remote.FtpConsumer - Exception checking 
> connection status: File operation failed: null Connection is not open. Code: 0
> [DefaultQuartzScheduler-camel-1_Worker-1] DEBUG 
> org.apache.camel.component.file.remote.FtpConsumer - Not connected/logged in, 
> connecting to: ftp://testuser@localhost:21
> [DefaultQuartzScheduler-camel-1_Worker-1] DEBUG 
> org.apache.camel.component.file.remote.FtpConsumer - Connected and logged in 
> to: ftp://testuser@localhost:21
> [DefaultQuartzScheduler-camel-1_Worker-1] DEBUG 
> org.apache.camel.component.file.remote.FtpConsumer - Took 0.151 seconds to 
> poll: testdir
> [DefaultQuartzScheduler-camel-1_Worker-1] DEBUG 
> org.apache.camel.component.file.remote.FtpConsumer - Total 1 files to consume
> [DefaultQuartzScheduler-camel-1_Worker-1] DEBUG 
> org.apache.camel.processor.DeadLetterChannel - Failed delivery for 
> (MessageId: ID-Klauss-MacBook-Pro-2-local-52649-1478165172245-0-2 on 
> ExchangeId: ID-Klauss-MacBook-Pro-2-local-52649-1478165172245-0-3). On 
> delivery attempt: 0 caught: 
> org.apache.camel.component.file.GenericFileOperationFailedException: Cannot 
> retrieve file: RemoteFile[testfile.txt] from: 
> ftp://localhost:21/testdir?autoCreate=false&consumer.bridgeErrorHandler=true&fileName=testfile.txt&password=xxxxxx&pollStrategy=%23try3times&processStrategy=%23myProcessStrategy&scheduler=quartz2&scheduler.cron=15+0%2F1+*+%3F+*+*&throwExceptionOnConnectFailed=true&timeout=5000&username=testuser
> org.apache.camel.component.file.GenericFileOperationFailedException: Cannot 
> retrieve file: RemoteFile[testfile.txt] from: 
> ftp://localhost:21/testdir?autoCreate=false&consumer.bridgeErrorHandler=true&fileName=testfile.txt&password=xxxxxx&pollStrategy=%23try3times&processStrategy=%23myProcessStrategy&scheduler=quartz2&scheduler.cron=15+0%2F1+*+%3F+*+*&throwExceptionOnConnectFailed=true&timeout=5000&username=testuser
>       at 
> org.apache.camel.component.file.GenericFileConsumer.processExchange(GenericFileConsumer.java:436)
>       at 
> org.apache.camel.component.file.remote.RemoteFileConsumer.processExchange(RemoteFileConsumer.java:137)
>       at 
> org.apache.camel.component.file.GenericFileConsumer.processBatch(GenericFileConsumer.java:227)
>       at 
> org.apache.camel.component.file.GenericFileConsumer.poll(GenericFileConsumer.java:191)
>       at 
> org.apache.camel.impl.ScheduledPollConsumer.doRun(ScheduledPollConsumer.java:175)
>       at 
> org.apache.camel.impl.ScheduledPollConsumer.run(ScheduledPollConsumer.java:102)
>       at 
> org.apache.camel.pollconsumer.quartz2.QuartzScheduledPollConsumerJob.execute(QuartzScheduledPollConsumerJob.java:61)
>       at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
>       at 
> org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:573)
> [DefaultQuartzScheduler-camel-1_Worker-1] DEBUG 
> org.apache.camel.processor.SendProcessor - >>>> direct://deadletter 
> Exchange[ID-Klauss-MacBook-Pro-2-local-52649-1478165172245-0-3]
> [DefaultQuartzScheduler-camel-1_Worker-1] INFO 
> org.apache.camel.processor.interceptor.Tracer - 
> ID-Klauss-MacBook-Pro-2-local-52649-1478165172245-0-3 >>> (route1) 
> from(ftp://localhost:21/testdir?autoCreate=false&consumer.bridgeErrorHandler=true&fileName=testfile.txt&password=testpass&pollStrategy=%23try3times&processStrategy=%23myProcessStrategy&scheduler=quartz2&scheduler.cron=15+0%2F1+*+%3F+*+*&throwExceptionOnConnectFailed=true&timeout=5000&username=testuser)
>  --> log[On dead letter!!] <<< Pattern:InOnly, 
> Headers:{breadcrumbId=ID-Klauss-MacBook-Pro-2-local-52649-1478165172245-0-2}, 
> BodyType:String, Body:Error processing file RemoteFile[testfile.txt] due to 
> Cannot retrieve file: RemoteFile[testfile.txt] from: 
> ftp://localhost:21/testdir?autoCreate=false&consumer.bridgeErrorHandler=true&fileName=testfile.txt&password=xxxxxx&pollStrategy=%23try3times&processStrategy=%23myProcessStrategy&scheduler=quartz2&scheduler.cron=15+0%2F1+*+%3F+*+*&throwExceptionOnConnectFailed=true&timeout=5000&username=testuser
> [DefaultQuartzScheduler-camel-1_Worker-1] INFO route1 - On dead letter!!
> [DefaultQuartzScheduler-camel-1_Worker-1] DEBUG 
> org.apache.camel.processor.Pipeline - Message exchange has failed: so 
> breaking out of pipeline for exchange: 
> Exchange[ID-Klauss-MacBook-Pro-2-local-52649-1478165172245-0-3] Handled by 
> the error handler.
> [DefaultQuartzScheduler-camel-1_Worker-1] INFO 
> org.apache.camel.example.ftp.ConsumerPollStrategy - Commiting 1 msgs for 
> endpoint: 
> ftp://localhost:21/testdir?autoCreate=false&consumer.bridgeErrorHandler=true&fil...



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