[NET-270] Incorrect error handling in method initiateListParsing of FTPClient

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0
• Fix Version/s: 3.0
• Component/s: FTP

Environment

XP - java version "1.5.0_09" - FileZilla server 0.9.30beta

• Assignee: Unassigned
• Reporter: Gilles Gaillard
• Created: 08/Apr/09 18:42
• Updated: 04/Jun/11 23:26
• Resolved: 03/Mar/11 00:45

Description

In method initiateListParsing of FTPClient, errors when opening the data connection are not correctly handled.
This leads to ignore message delivered by the server and further operation with the FTPClient instance are not valid.

As an example, considere the attached unit test. When such an error is met, using the sendNoOp command returns false.
Here is an output of the test:

F:\dev\jakarta\>run org.apache.commons.vfs.provider.ftp.FTPClientUnitTest 10.0.0.x 21 /GILLES/source usr pass 5500
Ignoring error when creating client at iteration: 1152
Error at iteration: 1155
java.net.SocketTimeoutException: Accept timed out
        at java.net.PlainSocketImpl.socketAccept(Native Method)
        at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:384)
        at java.net.ServerSocket.implAccept(ServerSocket.java:450)
        at java.net.ServerSocket.accept(ServerSocket.java:421)
        at org.apache.commons.net.ftp.FTPClient._openDataConnection_(FTPClient.java:489)
        at org.apache.commons.net.ftp.FTPClient.initiateListParsing(FTPClient.java:2296)
        at org.apache.commons.net.ftp.FTPClient.initiateListParsing(FTPClient.java:2269)
        at org.apache.commons.net.ftp.FTPClient.listFiles(FTPClient.java:2046)
        at org.apache.commons.vfs.provider.ftp.FTPClientUnitTest.testConnectTimeoutInList(FTPClientUnitTest.java:70)
        at org.apache.commons.vfs.provider.ftp.FTPClientUnitTest.main(FTPClientUnitTest.java:110)
Exception in thread "main" junit.framework.AssertionFailedError: NOOP failed at iteration 1155
        at junit.framework.Assert.fail(Assert.java:47)
        at junit.framework.Assert.assertTrue(Assert.java:20)
        at org.apache.commons.vfs.provider.ftp.FTPClientUnitTest.testConnectTimeoutInList(FTPClientUnitTest.java:75)
        at org.apache.commons.vfs.provider.ftp.FTPClientUnitTest.main(FTPClientUnitTest.java:110)