I am using ftp apache's commomns net version 3.1 .
The ftp connection gets in hung state while doing listing operation INTERMITTENTLY .
The reason i feel so seems to be ftp client is kept waiting indefnitely for server response for FTP command PASV while trying to open data connection for listing operation.
How do i need to set read timeout on control connection to avoid this situation.
I have set readtimeout on data connection using setDataTimeout().
For more refer : http://commons.apache.org/proper/commons-net/apidocs/org/apache/commons/net/ftp/FTPClient.html#setDataTimeout(int)
1)Does setting setsoTimeout() after doing ftp connect() operation helps avoiding this situation on control connection?
For more refer : http://commons.apache.org/proper/commons-net/apidocs/org/apache/commons/net/SocketClient.html#setSoTimeout(int)
2)If so,what is the optimum timeout value i need to set for setsotimeout() ?
Please find stack trace below:
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:140)
at sun.nio.cs.StreamDecoder$CharsetSD.readBytes(StreamDecoder.java:464)
at sun.nio.cs.StreamDecoder$CharsetSD.implRead(StreamDecoder.java:506)
at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:234)
at java.io.InputStreamReader.read(InputStreamReader.java:188)
at java.io.BufferedReader.fill(BufferedReader.java:147)
at java.io.BufferedReader.read(BufferedReader.java:168)
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.FTPClient.openDataConnection(FTPClient.java:7
69)
at org.apache.commons.net.ftp.FTPClient.openDataConnection(FTPClient.java:6
57)
at org.apache.commons.net.ftp.FTPClient.initiateListParsing(FTPClient.java:
3097)
at org.apache.commons.net.ftp.FTPClient.initiateListParsing(FTPClient.java:
3072)
at org.apache.commons.net.ftp.FTPClient.initiateListParsing(FTPClient.java:
2972
Any help on this will be appreciated:)
Thanks.
