在成功打开Pop3Folder并从中检索消息后，我有时会在folder.isOpen返回时直奔主题false。同时，Pop3Folder在调试模式下查看 's 字段时，我看到该字段opened设置为true.
有人可以给我一个提示，这里可能出了什么问题？
这是代码：
public void popMail(MessageProcessor messageProcessor) throws MessagingException {
Folder inboxFolder = null;
Store store = null;
try {
store = mailSession.getStore();
store.connect(mailSession.getProperty("mail.user"),
mailSession.getProperty("mail.password"));
// OK. Connected to POP3 Store.
inboxFolder = store.getFolder("inbox");
inboxFolder.open(Folder.READ_WRITE);
// The folder is successfully opened.
Message[] msgs = inboxFolder.getMessages();
// Messages are successfully retrieved.
if (msgs != null && msgs.length > 0) {
for (Message msg : msgs) {
if (messageProcessor != null) {
// Calling custom listener to process message
messageProcessor.processMessage(msg);
}
msg.setFlag(Flag.DELETED, true);
}
}
} finally {
// Oops, inboxFolder.isOpen returns false.
// Meanwhile I see in debug mode that inboxFolder#opened is set to true
if (inboxFolder != null && inboxFolder.isOpen()) {
try {
inboxFolder.close(true);
} catch (MessagingException e) {
log.warn("Error while closing folder");
}
} if (store != null) {
try {
store.close();
} catch (MessagingException e) {
log.warn("Error while closing store");
}
}
}
}