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https://issues.apache.org/jira/browse/NET-718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17698070#comment-17698070
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Sebastian Alfers commented on NET-718:
--------------------------------------
Hi [~ggregory] , thanks for your immediate response!
Please see this branch I made, containing a reproducer (unfortunately only
reproducible with an integration test):
https://github.com/apache/commons-net/compare/master...sebastian-alfers:commons-net:ftps-proxy-error
It is this contribution that introduced the problem:
[https://github.com/apache/commons-net/pull/90]
As I point out in my reproducer-branch, this lines seem to cause the problem:
https://github.com/apache/commons-net/blob/master/src/main/java/org/apache/commons/net/ftp/FTPSClient.java#L794-L796
> "Unsupported or unrecognized SSL message" for FTPS via proxy
> ------------------------------------------------------------
>
> Key: NET-718
> URL: https://issues.apache.org/jira/browse/NET-718
> Project: Commons Net
> Issue Type: Bug
> Affects Versions: 3.9.0
> Reporter: Sebastian Alfers
> Priority: Major
>
> After bumping from commons-net 3.8 to 3.9, we started to see this error.
> I happens only when using FTPS via a proxy, and it is likely that this change
> may have introduced.
>
> Any recommendation how to bring back the pre-3.9 behavior? This is the full
> stacktrace:
> {code:java}
> Start of log messages of test that failed with assertion failed:
> fishForMessage(OnNext(_) or OnComplete) found unexpected message
> OnError(javax.net.ssl.SSLException: Unsupported or unrecognized SSL message
> at
> java.base/sun.security.ssl.SSLSocketInputRecord.handleUnknownRecord(SSLSocketInputRecord.java:451)
> at
> java.base/sun.security.ssl.SSLSocketInputRecord.decode(SSLSocketInputRecord.java:175)
> at java.base/sun.security.ssl.SSLTransport.decode(SSLTransport.java:111)
> at
> java.base/sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1505)
> at
> java.base/sun.security.ssl.SSLSocketImpl.readHandshakeRecord(SSLSocketImpl.java:1420)
> at
> java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:455)
> at
> java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:426)
> at
> org.apache.commons.net.ftp.FTPSClient.openDataConnection(FTPSClient.java:278)
> at
> org.apache.commons.net.ftp.FTPClient._retrieveFileStream(FTPClient.java:915)
> at
> org.apache.commons.net.ftp.FTPClient.retrieveFileStream(FTPClient.java:2841)
> at
> akka.stream.alpakka.ftp.impl.CommonFtpOperations.$anonfun$retrieveFileInputStream$1(CommonFtpOperations.scala:71)
> at scala.util.Try$.apply(Try.scala:210) {code}
>
>
>
>
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