Tomcat application undeploy problem

Question

Hi all,
I have a problem using JavaMail in a web application using Tomcat 5.5.9 under Windows XP SP2. I can correctly send mails, both with and without attachments, but when I try to undeploy the app the mail.jar library remains "occupied" and Tomcat is unable to delete the app folder and undeploy it cleanly. The result is that I can't deploy new versions of the app until I stop the web server, delete the folder manually, and restart the server.
The library is located in the WEB-INF/lib folder of the application (togheter with the activation.jar library).
Doing some tests I noticed the problem is when I call the saveChanges() on a MimeMessage object, but only when I call the setText() method or the setContent() method adding a Multipart content to the message. If I only set recipients, subject and from field of the MimeMessage all goes well. I also tried to call the writeTo() method and save the message to a file instead of sending it, but the behaviour is the same.
Here is the piece of code I use to send e-mails...if anyone has any suggestion or solution it is very appreciated :) Thanks for any help!
Properties props = System.getProperties();
props.put("mail.smtp.host", smtp);
if(smtpAuth) props.put("mail.smtp.auth","true");
Session session;
Authenticator pwdAuth = null;
if(smtpAuth)
     pwdAuth = new SMTPAuthenticator(user,pwd);
session = Session.getInstance(props, pwdAuth);               
Address[] rec = new Address[recipients.size()];
int i = 0;
for(Iterator it = recipients.iterator();it.hasNext();) {
     String d = (String)it.next();
     try {
          rec[i++] = new InternetAddress(d);                         
     } catch(AddressException e) {
try {
     Transport tran = session.getTransport("smtp");
     if(smtpAuth)
          tran.connect(smtp,user,pwd);
     else
          tran.connect();
     MimeMessage message = new MimeMessage(session);
     String mitt = this.emailAddress;
     if(nick!=null)
          message.setFrom(new InternetAddress(sender,nick));
     else
          message.setFrom(new InternetAddress(sender,senderAddress));
     message.addRecipients(MimeMessage.RecipientType.TO,dest);
     message.addHeader("X-Mailer","RT E-Mailer");
     message.addHeader("X-Priority",priority);
     message.setSubject(subject);
     if(attach == null) {
          message.setText(text);
     } else {
          Multipart multipart = new MimeMultipart();
          MimeBodyPart messageBodyPart = new MimeBodyPart();
          messageBodyPart.setText(text);
          multipart.addBodyPart(messageBodyPart);
          for(int j = 0; j < attach.length; j++) {
               Attachment a = attach[j];
               messageBodyPart = new MimeBodyPart();
               DataSource source = new FileDataSource(a.getFilename());
               messageBodyPart.setDataHandler(new DataHandler(source));
               messageBodyPart.setFileName(new File(a.getFilename()).getName());
               multipart.addBodyPart(messageBodyPart);
          message.setContent(multipart);
     message.saveChanges();
     tran.sendMessage(message,dest);
     tran.close();
     ret = true;
} catch(SendFailedException e) {
     ret = false;
} catch (Exception e) {
     ret = false;
}

Answer 1

Hi,
I have also the same problem. please help me if you find any way to resolve this issue.
Thanks,
Prasad.N