JavaMail POP Issue - memory leak

[Jeff]

I'm finding that as I loop through a large pop store and reading each
message into an input stream that the JVM is running out of memory for the
case where the pop store is large (several thousand messages). I've run
this code through JProbe and found that InternetHeaders seems to be the
culprit as the memory heap grows over time for this class but for the life
of me I can't figure out how to get the objects freed up for garbage
collection.

Any hints as to how to avoid this problem? I'm currently using
j2sdk1.4.0_02, javamail-1.3, and jaf-1.0.2

Code follows:
import java.io.*;
import java.util.*;
import javax.mail.*;
import java.sql.*;

public class popParse {

private static String host;
private static String mailAccountName ;
private static String mailAccountPass ;
private static Session mSession;

public static void main (String args[]){
host = args[0];
mailAccountName = args[1];
mailAccountPass = args[2];

// Get session
mSession = Session.getInst ance(new Properties(), null);

checkAccount(ma ilAccountName,m ailAccountPass) ;

}
private static void checkAccount(St ring aUserName, String aPassword){

try{

// Get the store
Store store = mSession.getSto re("pop3");
store.connect(h ost, aUserName, aPassword);

// Get folder
Folder folder = store.getFolder ("INBOX");
folder.open(Fol der.READ_WRITE) ;

for (int i=0; i<len; i++) {
Message msg = folder.getMessa ge(i+1);
try{
InputStream is = msg.getInputStr eam();

// rest of parsing routine goes here... truncated for
example only

is.close();
is = null;
msg = null;

}catch(IOExcept ion e){
System.out.prin tln(e.getMessag e());
}catch(Messagin gException e){
System.out.prin tln(e.getMessag e());
}catch(Exceptio n e){
System.out.prin tln(e.getMessag e());
}
} // end of for loop over all messages

}catch(NoSuchPr oviderException e){
System.out.prin tln(e.getMessag e());
}catch(Messagin gException e){
System.out.prin tln(e.getMessag e());
}
}
}

[Simon Hawkins]

Perhaps the wrong way of looking at the problem but you could always
allocate more memory to the Virtual Machine as you execute your program. I
think it's an option setting for the command line that points to your class.

//Simon
"Jeff" <ju*********@co x.net> skrev i meddelandet
news:RQ6Vc.5537 $016.2332@fed1r ead01...

I'm finding that as I loop through a large pop store and reading each
message into an input stream that the JVM is running out of memory for the
case where the pop store is large (several thousand messages). I've run
this code through JProbe and found that InternetHeaders seems to be the
culprit as the memory heap grows over time for this class but for the life
of me I can't figure out how to get the objects freed up for garbage
collection.

Any hints as to how to avoid this problem? I'm currently using
j2sdk1.4.0_02, javamail-1.3, and jaf-1.0.2

Code follows:
import java.io.*;
import java.util.*;
import javax.mail.*;
import java.sql.*;

public class popParse {

private static String host;
private static String mailAccountName ;
private static String mailAccountPass ;
private static Session mSession;

public static void main (String args[]){
host = args[0];
mailAccountName = args[1];
mailAccountPass = args[2];

// Get session
mSession = Session.getInst ance(new Properties(), null);

checkAccount(ma ilAccountName,m ailAccountPass) ;

}
private static void checkAccount(St ring aUserName, String aPassword){

try{

// Get the store
Store store = mSession.getSto re("pop3");
store.connect(h ost, aUserName, aPassword);

// Get folder
Folder folder = store.getFolder ("INBOX");
folder.open(Fol der.READ_WRITE) ;

for (int i=0; i<len; i++) {
Message msg = folder.getMessa ge(i+1);
try{
InputStream is = msg.getInputStr eam();

// rest of parsing routine goes here... truncated for
example only

is.close();
is = null;
msg = null;

}catch(IOExcept ion e){
System.out.prin tln(e.getMessag e());
}catch(Messagin gException e){
System.out.prin tln(e.getMessag e());
}catch(Exceptio n e){
System.out.prin tln(e.getMessag e());
}
} // end of for loop over all messages

}catch(NoSuchPr oviderException e){
System.out.prin tln(e.getMessag e());
}catch(Messagin gException e){
System.out.prin tln(e.getMessag e());
}
}
}