Hi!
This is how I fixed uploading big files in Cargo. Perhaps this is what
you are looking for.
// When trying to upload large amount of data the internal
connection buffer can become
// too large and exceed the heap size, leading to a
java.lang.OutOfMemoryError.
// This was fixed in JDK 1.5 by introducing a new
setChunkedStreamingMode() method.
// As Cargo should also work with JDK versions lesser than
1.5 we use reflection to call
// setChunkedStreamingMode(). If it fails, we assume we're
running an older version of
// the JDK. In that case the solution for the user is to
increase it's heap size.
// For reference, see the following discussions about this:
//
http://www.velocityreviews.com/forums/t149076-leaking-memory-when-writin
g-to-url.html
//
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5026745
//
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4212479
try
{
connection.getClass().getMethod("setChunkedStreamingMode",
new Class[] {Integer.TYPE}).invoke(connection, new
Object[] {new Integer(0)});
}
catch (Exception e)
{
// We assume we're on an older JDK version, do nothing.
getLogger().debug("Not calling setChunkedStreamingMode()
method as JVM ["
+ System.getProperty("java.version") + "] doesn't
support it.",
getClass().getName());
}
Best regards,
Juri.
-----Original Message-----
From: Bibs L [mailto:[EMAIL PROTECTED]
Sent: Thursday, April 26, 2007 2:01 AM
To: [email protected]; [EMAIL PROTECTED]
Subject: java.lang.OutOfMemoryError - IOUtils.copy - When file size
larger than 7 MB
Hi,
I am stuck with a java.lang.OutOfMemoryError when I try to copy a file
of about 7 MB from a window server. I am using the
org.apache.commons.io.IOUtils,
IOUtils.copy(fileIn, response.getOutputStream()) with Survlet response
to get the download diaglog to pop up.
This is working fine when I run it locally - (download file larger
than 7MB), but when I deploy the code to Shaed Environment- (download
the SAME file larger than 7MB), it is throwing
java.lang.OutOfMemoryError Exception. And evertime it throw the
OutOfMemoryError, it creates a heapdump<dateTimestamp>.phd file and a
javacore<dateTimeStamp> File on the shared environemnt's profile
location.
Does anyone know what I need to do to fix this issue?
The only thing I could think of is that the memory is low on the
server, do we need to increase the JVM heap? What's the down side to
that?
Is it something I am doing wring in my Code below? I could download
file size less than 7MB.
A few notes about our shared envirnment:
- We are running WebSphere 6.0 on Window server
- It is a Virtual Machine
- 4 GBs on server, but is split to 4 server instance, so we have about
1 GB
- The code below is executed on WebSphere, but the file that need to
be downloaded is on a different window server - shared server -
"//serverName/somedir/file.doc"
I would greatly appreciate any help you could offer!!!!
THANKS!!!!!!!!!!!!!!!!!
Here's my code:
FileInputStream fileIn = null;
File file = null;
URL url = null;
URLConnection urlConn = null;
InputStream in = null;
PrintWriter pw = null;
try{
file = new File("\\serverPath\download\documents\test.doc");
if(file.exists() == true){
LOG.debug("file exists...");
//generate URL for file
url = file.toURL();
urlConn = url.openConnection();
in = url.openStream();
fileIn = new FileInputStream(file);
response.setContentType(urlConn.getContentType());
response.setHeader("Content-Disposition","inline; filename=\"" +
file.getName() + "\"");
LOG.debug("urlConn.getContentType() = " + urlConn.getContentType());
long startTime = System.currentTimeMillis();
IOUtils.copy(fileIn, response.getOutputStream());
response.setStatus(response.SC_OK);
response.flushBuffer();
LOG.debug("Total Time Taken to download: "+(System.currentTimeMillis()
- startTime) + " ms"); renderFileFlag = true;
}else{
LOG.debug("file not found...");
}
} catch (FileNotFoundExceptione) {
LOG.error("FileNotFoundExceptione: download - " + e.getMessage(), e);
} catch (IOExceptione) {
LOG.error("IOException: download - " + e.getMessage(), e);
} catch (Exception e) {
LOG.error("Exception : download - " + e.getMessage(), e);
} finally {
if (facesContext != null) facesContext = null;
if (fileIn != null) fileIn.close();
if (file != null) file = null;
if (url != null) url = null;
if (urlConn != null) urlConn = null;
if (in != null) in.close();
if (pw != null) pw.close();
}
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