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Java Forum / General / April 2006JavaMail API Closing folder causes OutOfMemory
Hello I am getting an OutOfMemory error when I try to call close on Folder with expunge set to true. This is happening when I am having a large a number of e-mails with large attachments to be expunged. Any one else experienced this error? There are some postings that indicate that there might be a possible leak in JavaMail API, but nothing seems to be conclusive. I will be using a memory profiler to try to figure out what exactly is causing the leak, but any hints will be helpful. Thanks Harsh hagarwal@tamaleresearch.com wrote in news:1144334300.712910.164650 @e56g2000cwe.googlegroups.com: > I am getting an OutOfMemory error when I try to call close on Folder > with expunge set to true. Source code? Which version of JavaMail? Which subtype of Folder? javax.mail.Folder is an abstract class that has at least two concrete subclasses, com.sun.mail.imap.IMAPFolder and com.sun.mail.pop3.POP3Folder. You might also have better success asking this question on a JavaMail- specific forum, such as the mailing list that is run by Sun for JavaMail. See <http://java.sun.com/products/javamail/community/mailinglists/index.htm l> for details. This mailing list is also gatewayed to the new group gmane.comp.java.sun.javamail.general at the news server news.gmane.com. Cheers GRB Allright, so its not closing the folder. It seems that Sun's implementation of Javamail API hold messages in memory (isn't that stupid). So my applciation was throwing Outofmemory when there were many messages with huge attachments. For anyone interested, I had to re-architect my mail processor to dynamically figure out whether it has enough memory to process the next message. If it does not, it closes the folder thus making all the messages available for garbage collection. One can argue that this is not 100% fool-proof, but I have load tested it sufficiently to be confident that the solution will work. Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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