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https://issues.apache.org/jira/browse/CAMEL-12061?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16280176#comment-16280176
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dieter von holten commented on CAMEL-12061:
-------------------------------------------
i looked through the sources along the stacktrace - what happens during the
attempted poll and the exception looks reasonable for me.
However, the restart/retry-things are a little bit unclear. One excepion claims
'will try to reconnect on next attempt..' but i have yet to find the things
which enforce a reconnect after a failed poll....
> SFTP exception-handling more problemtatic than documented
> ---------------------------------------------------------
>
> Key: CAMEL-12061
> URL: https://issues.apache.org/jira/browse/CAMEL-12061
> Project: Camel
> Issue Type: Bug
> Components: camel-sftp
> Affects Versions: 2.20.1
> Environment: java 8, windows 2008 r2,
> Reporter: dieter von holten
> Priority: Minor
> Labels: ioexception, sftp
>
> my poll-sftp-server-for-files-to-download route crashes fom time to time. i
> happend to get a stacktrace which indicates an IoException when the SFTP
> component changes the folder to inspect on the remote site. Can happen -
> however, contrary to the documentation, which says an exception produces a
> warning and is otherwise ignored, the whole application goes down.
> -------------------------------------------------------------------------
> {{
> Dez 04, 2017 3:45:34 PM
> org.apache.camel.component.file.remote.RemoteFilePolling
> ConsumerPollStrategy rollback
> WARNUNG: Trying to recover by disconnecting from remote server forcing a
> re-connect at next poll: sftp://XXXXXXXXXXXXXXXX
> Dez 04, 2017 3:45:34 PM org.apache.camel.util.CamelLogger log
> WARNUNG: Consumer
> Consumer[sftp://XXXXXXXXXXXXX/out/prod/?delay=30000&delete=true&localWorkDirectory=c%3A%2FMarta%2FHgmTkw14%2Femcs%2Ftemp%2F&password=
> xxxxxx] failed polling endpoint:
> sftp://XXXXXXXXXXXXX/out/prod/?delay=30000&delete=true&localWorkDirectory=c%3A%2FMarta%2FHgmTkw14%2Femcs%2Ftemp%2F&pas
> sword=xxxxxx. Will try again at next poll. Caused by:
> [org.apache.camel.component.file.GenericFileOperationFailedException - Cannot
> change directory to: out]
> org.apache.camel.component.file.GenericFileOperationFailedException: Cannot
> change directory to: out
> at
> org.apache.camel.component.file.remote.SftpOperations.doChangeDirectory(SftpOperations.java:609)
> at
> org.apache.camel.component.file.remote.SftpOperations.changeCurrentDirectory(SftpOperations.java:597)
> at
> org.apache.camel.component.file.remote.SftpConsumer.doPollDirectory(SftpConsumer.java:108)
> at
> org.apache.camel.component.file.remote.SftpConsumer.pollDirectory(SftpConsumer.java:80)
> at
> org.apache.camel.component.file.GenericFileConsumer.poll(GenericFileConsumer.java:124)
> 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:745)
> Caused by: 4:
> at com.jcraft.jsch.ChannelSftp.cd(ChannelSftp.java:359)
> at
> org.apache.camel.component.file.remote.SftpOperations.doChangeDirectory(SftpOperations.java:607)
> ... 13 more
> Caused by: java.io.IOException: inputstream is closed
> at com.jcraft.jsch.ChannelSftp.fill(ChannelSftp.java:2911)
> at com.jcraft.jsch.ChannelSftp.header(ChannelSftp.java:2935)
> at com.jcraft.jsch.ChannelSftp._realpath(ChannelSftp.java:2355)
> at com.jcraft.jsch.ChannelSftp.cd(ChannelSftp.java:342)
> ... 14 more
> }}
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