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Posted to dev@camel.apache.org by "Tim Cull (JIRA)" <ji...@apache.org> on 2010/09/19 17:20:41 UTC
[jira] Commented: (CAMEL-3134) FTP poller seems to hang if it has
connection issues in the middle of downloading a file
[ https://issues.apache.org/activemq/browse/CAMEL-3134?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=61922#action_61922 ]
Tim Cull commented on CAMEL-3134:
---------------------------------
Wow that was fast thanks! I'll check it out
> FTP poller seems to hang if it has connection issues in the middle of downloading a file
> ----------------------------------------------------------------------------------------
>
> Key: CAMEL-3134
> URL: https://issues.apache.org/activemq/browse/CAMEL-3134
> Project: Apache Camel
> Issue Type: Improvement
> Components: camel-ftp
> Affects Versions: 2.4.0
> Environment: JDK 1.6 on windows and linux
> Reporter: Tim Cull
> Assignee: Claus Ibsen
> Priority: Minor
> Fix For: 2.5.0
>
>
> When connecting to a somewhat unstable FTP server, I occasionally have issues where the FTP poller dies (for all practical purposes because it stops polling, not sure what state it's actually in) if it encounters a connection issue in the middle of downloading a file. At the bottom of this issue is an example stack trace from when this issue occurs.
> I believe the exception is caused by a network-level issue with the connection to the remote FTP server. This belief is based on the comment by Guy Rouillier in this issue:
> https://issues.apache.org/jira/browse/NET-160
> The best fix is probably to put some retry logic in org.apache.camel.component.file.remote.FtpOperations.retrieveFileToFileInLocalWorkDirectory() such that if this line throws and exception:
> result = client.retrieveFile(onlyName, os);
> then it closes the local file output stream, deletes the local file (if there's anything there), disconnects from the FTP server, reconnects, and then tries the download again.
> [17/09/10 08:24:20:020 EDT] ERROR remote.FtpConsumer: Caused by: [org.apache.camel.component.file.GenericFileOperationFailedException - File operation failed
> : 125 Data connection open; transfer starting.
> IOException caught while copying.. Code: 125]
> org.apache.camel.component.file.GenericFileOperationFailedException: File operation failed: 125 Data connection open; transfer starting.
> IOException caught while copying.. Code: 125
> at org.apache.camel.component.file.remote.FtpOperations.retrieveFileToFileInLocalWorkDirectory(FtpOperations.java:310)
> at org.apache.camel.component.file.remote.FtpOperations.retrieveFile(FtpOperations.java:235)
> at org.apache.camel.component.file.GenericFileConsumer.processExchange(GenericFileConsumer.java:254)
> at org.apache.camel.component.file.GenericFileConsumer.processBatch(GenericFileConsumer.java:137)
> at org.apache.camel.component.file.GenericFileConsumer.poll(GenericFileConsumer.java:103)
> at org.apache.camel.impl.ScheduledPollConsumer.run(ScheduledPollConsumer.java:98)
> at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
> at java.util.concurrent.FutureTask$Sync.innerRunAndReset(Unknown Source)
> at java.util.concurrent.FutureTask.runAndReset(Unknown Source)
> at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(Unknown Source)
> at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(Unknown Source)
> at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
> at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
> at java.lang.Thread.run(Unknown Source)
> Caused by: org.apache.commons.net.io.CopyStreamException: IOException caught while copying.
> at org.apache.commons.net.io.Util.copyStream(Util.java:129)
> at org.apache.commons.net.ftp.FTPClient.retrieveFile(FTPClient.java:1286)
> at org.apache.camel.component.file.remote.FtpOperations.retrieveFileToFileInLocalWorkDirectory(FtpOperations.java:307)
> ... 14 more
> [
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