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  1. Commons Net
  2. NET-552

SocketTimeoutException connecting a FTP server via an HTTP Proxy

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 3.3
    • Fix Version/s: 3.4
    • Component/s: FTP
    • Environment:

      All

      Description

      Randomly, we're experiencing SocketTimoutException when we connect an FTP via an Http Proxy :

      java.io.IOException: Timed out waiting for initial connect reply
      	at org.apache.commons.net.ftp.FTP._connectAction_(FTP.java:403)
      	at org.apache.commons.net.ftp.FTPClient._connectAction_(FTPClient.java:931)
      	at org.apache.commons.net.ftp.FTPClient._connectAction_(FTPClient.java:925)
      	at org.apache.commons.net.ftp.FTPHTTPClient.connect(FTPHTTPClient.java:144)
      Caused by: java.net.SocketTimeoutException: Read timed out
      	at java.net.SocketInputStream.socketRead0(Native Method)
      	at java.net.SocketInputStream.read(SocketInputStream.java:150)
      	at java.net.SocketInputStream.read(SocketInputStream.java:121)
      	at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:284)
      	at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:326)
      	at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:178)
      	at java.io.InputStreamReader.read(InputStreamReader.java:184)
      	at java.io.BufferedReader.fill(BufferedReader.java:161)
      	at java.io.BufferedReader.read(BufferedReader.java:182)
      	at org.apache.commons.net.io.CRLFLineReader.readLine(CRLFLineReader.java:58)
      	at org.apache.commons.net.ftp.FTP.__getReply(FTP.java:315)
      	at org.apache.commons.net.ftp.FTP.__getReply(FTP.java:295)
      	at org.apache.commons.net.ftp.FTP._connectAction_(FTP.java:397)
      	... 6 more
      

      After analysis, I think the problem is that commons-net opens 2 BufferedReader on the same InputStream : first in the FTPHTTPClient.tunnelHandshake method, and the second in FTP._connectAction() method.
      If the first BufferedReader reads all datas in the socket, the second waits until SocketTimeout.

        Attachments

        1. ftp.patch
          4 kB
          Quentin Devriendt

          Activity

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            • Assignee:
              Unassigned
              Reporter:
              qdevriendt Quentin Devriendt
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              Dates

              • Created:
                Updated:
                Resolved: