vijayan created FTPSERVER-435:
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Summary: FTPClient - 3.0.1 - Randomly throwing connection timed
out error during listfile / connect
Key: FTPSERVER-435
URL: https://issues.apache.org/jira/browse/FTPSERVER-435
Project: FtpServer
Issue Type: Bug
Reporter: vijayan
Priority: Critical
Previously we were using common-net-2.2 version and at sometimes we used to get
FTPconnectionclosedexception. This was resolved by upgrading to
commons-net-3.0.1 version using control keep-alive timeout feature. Now we are
facing another issue in a random time interval in our production environment.
Most of the times it works fine but at time during ftpclient.listfiles
/ftpclient.connect call we are getting the connection timed out exception.
Please see the exception stacktrace.
java.net.ConnectException: Connection timed out
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:529)
at
org.apache.commons.net.ftp.FTPClient._openDataConnection_(FTPClient.java:726)
at
org.apache.commons.net.ftp.FTPClient.initiateListParsing(FTPClient.java:2990)
at
org.apache.commons.net.ftp.FTPClient.initiateListParsing(FTPClient.java:2965)
at org.apache.commons.net.ftp.FTPClient.listFiles(FTPClient.java:2685)
================================================================
java.net.ConnectException: Connection timed out
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:529)
at org.apache.commons.net.SocketClient.connect(SocketClient.java:168)
at org.apache.commons.net.SocketClient.connect(SocketClient.java:189)
Neven seen / faced this kind of exception when using 2.2 version. This is been
occurring after the upgradation.
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