Rational values for timeout

Question

Do you have rational Values for the timeout? [ setTimeout(int timeout) ]
With very small values ~ 1 msec I get an Exception (obvioulsy).
I tried 1000 but sometimes get the read timeout exception and sometimes not.
What do you suggest to use for the timeout value? 10 sec? 1 minute? The documentaion does not mention it.

Another question: Does the timeout happen when downloading a very big file, too? E.g. transmission of an 1GB file would take more then 10 seconds.

Thanks in advance.

Answer 1

Timeout shouldn't be set generally but the Java default used (no timeout).

Timeout is during a read or write, i.e. if there is a delay on the socket read/write. It is irrelevant how long it takes to transfer the file. See the java.io.Socket Javadoc for more info.

Do you have rational Values for the timeout? [ setTimeout(int timeout) ]
With very small values ~ 1 msec I get an Exception (obvioulsy).
I tried 1000 but sometimes get the read timeout exception and sometimes not.
What do you suggest to use for the timeout value? 10 sec? 1 minute? The documentaion does not mention it.

Another question: Does the timeout happen when downloading a very big file, too? E.g. transmission of an 1GB file would take more then 10 seconds.

Thanks in advance.

Answer 2

Thanks for the quick reply.

Regarding the timeout value: if I use no timeout the socket would block forever which is probably not a good idea for a server process.
It would be great to have a default value for the timeout where one safely assumes that the server will not reply any more (hangs).

Timeout shouldn't be set generally but the Java default used (no timeout).

Answer 3

30 seconds is reasonable, i.e. 30000 (as it is in milliseconds)

Thanks for the quick reply.

Regarding the timeout value: if I use no timeout the socket would block forever which is probably not a good idea for a server process.
It would be great to have a default value for the timeout where one safely assumes that the server will not reply any more (hangs).

Timeout shouldn't be set generally but the Java default used (no timeout).

Answer 4

Thank you very much !
Rainer

30 seconds is reasonable, i.e. 30000 (as it is in milliseconds)

Answer 5

I'm using the FTPj library in my code, and it usually works well. I have not set a timeout value, but sometimes I see this error message:
com.enterprisedt.net.ftp.FTPException: Timeout (900 seconds): closing control co nnection.
at com.enterprisedt.net.ftp.FTPControlSocket.validateReply(FTPControlSoc
ket.java:689)
at com.enterprisedt.net.ftp.FTPClient.modtime(FTPClient.java:2109)

Is there a default timeout in FTPj?

Another question I have is that is it possible to query the size of the remote file?

Answer 6

This is the FTP server timeout.

Use size() or dirDetails() to find the size of a file.

I'm using the FTPj library in my code, and it usually works well. I have not set a timeout value, but sometimes I see this error message:
com.enterprisedt.net.ftp.FTPException: Timeout (900 seconds): closing control co nnection.
at com.enterprisedt.net.ftp.FTPControlSocket.validateReply(FTPControlSoc
ket.java:689)
at com.enterprisedt.net.ftp.FTPClient.modtime(FTPClient.java:2109)

Is there a default timeout in FTPj?

Another question I have is that is it possible to query the size of the remote file?