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https://issues.apache.org/jira/browse/CAMEL-12061?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16328550#comment-16328550
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Claus Ibsen commented on CAMEL-12061:
-------------------------------------
Okay we have improved this to do a hard/forced disconnect so the sftp client
should be fresh on next poll (before some state may have been left). You can
try the 2.21.0 release when its out, or build and try from master yourself.
> 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
> Fix For: 2.21.0
>
>
> 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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