GeeCON Prague 2014*
The moose likes Tomcat and the fly likes Can't download large file from url by tomcat Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login


JavaRanch » Java Forums » Products » Tomcat
Bookmark "Can Watch "Can New topic
Author

Can't download large file from url by tomcat

Ori Brill
Greenhorn

Joined: Jun 12, 2011
Posts: 2
Hi all..

I have a problem that's been bothering me for a month already.

I write a code that download url file to my workspace. My code works well for any size file.
Here is my code:



But, i want to do it automaticly, so i packaged this code by Java Service. I use tomcat 7.0.12.

Now, this code works well only for small files. If i try to download large file like the second one, I get this error for "byteCount = in.read(buffer);" line:


java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(SocketInputStream.java:185)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
at java.io.BufferedInputStream.read(BufferedInputStream.java:254)
at sun.net.ftp.impl.FtpClient.readServerResponse(FtpClient.java:417)
at sun.net.ftp.impl.FtpClient.readReply(FtpClient.java:494)
at sun.net.ftp.impl.FtpClient.issueCommand(FtpClient.java:529)
at sun.net.ftp.impl.FtpClient.issueCommandCheck(FtpClient.java:540)
at sun.net.ftp.impl.FtpClient.openPassiveDataConnection(FtpClient.java:603)
at sun.net.ftp.impl.FtpClient.openDataConnection(FtpClient.java:696)
at sun.net.ftp.impl.FtpClient.getFileStream(FtpClient.java:1269)
at sun.net.www.protocol.ftp.FtpURLConnection.getInputStream(FtpURLConnection.java:427)
at java.net.URL.openStream(URL.java:1035)
at MyService.downloadFilesToWorkspace(MyService.java:137)
at MyService.doDownloadForToday(MyService.java:87)
at MyService.start(MyService.java:47)
at MyService.windowsService(MyService.java:35)
java.lang.NullPointerException
at MyService.downloadFilesToWorkspace(MyService.java:153)
at MyService.doDownloadForToday(MyService.java:87)
at MyService.start(MyService.java:47)
at MyService.windowsService(MyService.java:35)


If someone has any idea why this happens and what sould i change, i would be glad to hear them.

Thanks,

Ori
Daniel Yan
Greenhorn

Joined: Nov 24, 2011
Posts: 1
Hi Ori,

Have you got an answer?
I have exactly the same problem. I have tried different solutions but with the same result.
Goes well for small files, not for big ones.
The read() function stops until it get's connection reset after a while.

Also tried apache.commons.io.FileUtils.getURLToFile(URL ..., File ...) but with same result.

Curious, is that instead of getting an url file (http://...), I tried with the same file (downloaded by browser) already saved at my disk (file:///...). And from filesystem it works with the same code.
I suspect the problem is the connections opened.

Hope for a solution,
DnlCY
Ori Brill
Greenhorn

Joined: Jun 12, 2011
Posts: 2
Hi daniel,

Unfortunately, I did not find a solution then. It was part of my BSc's finish project and i was supposed to have it ready by the deadline.
Without a solution, I changed the project design so that the operation <file downloading> will not occur automatically by Java Servise but by the task scheduler of the operating system.

But still nice to find people who read my problems

Sorry And Tnx,

Ori
 
GeeCON Prague 2014
 
subject: Can't download large file from url by tomcat