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https://issues.apache.org/jira/browse/HADOOP-11774?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14386294#comment-14386294
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Haris AL commented on HADOOP-11774:
-----------------------------------
FTPFileSystem.disconnect() internally calls FTPClient->logout() and
FTPClient->disconnect(). Both these methods throws Exceptions.If a connection
exception happens, we are likely not being able to connect with FTP Server.
calling logout() will try to connect to FTP server again and access resources.
> listStatus in FTPFileSystem fails with connection reset
> -------------------------------------------------------
>
> Key: HADOOP-11774
> URL: https://issues.apache.org/jira/browse/HADOOP-11774
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 2.3.0
> Environment: Remote FTP located in Windows NT FTP
> Reporter: Krishnamoorthy Dharmalingam
>
> Following exception trace raised when FTPFileSystem.listStatus() called in
> Passive/active mode.
> Caused by: java.net.SocketException: Connection reset
> at java.net.SocketInputStream.read(SocketInputStream.java:196)
> at java.net.SocketInputStream.read(SocketInputStream.java:122)
> at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:283)
> at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:325)
> at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:177)
> at java.io.InputStreamReader.read(InputStreamReader.java:184)
> at java.io.BufferedReader.fill(BufferedReader.java:154)
> at java.io.BufferedReader.read(BufferedReader.java:175)
> at
> org.apache.commons.net.io.CRLFLineReader.readLine(CRLFLineReader.java:58)
> at org.apache.commons.net.ftp.FTP.__getReply(FTP.java:310)
> at org.apache.commons.net.ftp.FTP.__getReply(FTP.java:290)
> at org.apache.commons.net.ftp.FTP.sendCommand(FTP.java:479)
> at org.apache.commons.net.ftp.FTP.sendCommand(FTP.java:552)
> at org.apache.commons.net.ftp.FTP.sendCommand(FTP.java:601)
> at org.apache.commons.net.ftp.FTP.quit(FTP.java:809)
> at org.apache.commons.net.ftp.FTPClient.logout(FTPClient.java:979)
> at
> org.apache.hadoop.fs.ftp.FTPFileSystem.disconnect(FTPFileSystem.java:151)
> at
> org.apache.hadoop.fs.ftp.FTPFileSystem.getFileStatus(FTPFileSystem.java:395)
> at org.apache.hadoop.fs.FileSystem.isFile(FileSystem.java:1424)
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