UIDFolder.getMessageByUID(UIDFolder.LASTUID) throws A4 BAD Could not parse

Question

I get a Folder from an imap store like this
          Properties props = System.getProperties();
          props.setProperty("mail.store.protocol", "imaps");
          Session session = Session.getDefaultInstance(props, null);
          Store store = session.getStore("imaps");
          store.connect("imap.gmail.com", USER_NAME, PASSWORD);
          Folder folder = store.getFolder(folderName);
Then I try to get the newest message in the folder:
          UIDFolder uidFolder = ((UIDFolder) folder);
          Message lastMessage = ((UIDFolder) folder).getMessageByUID(UIDFolder.LASTUID);
The last line throws this Exception:
javax.mail.MessagingException: A4 BAD Could not parse command;
nested exception is:
     com.sun.mail.iap.BadCommandException: A4 BAD Could not parse command
     at com.sun.mail.imap.IMAPFolder.getMessageByUID(IMAPFolder.java:1895)
     at com.clipper.metadata.mail.provider.Gmail.downloadRwdFilesFromLastMessage(Gmail.java:82)
     at com.clipper.metadata.mail.provider.Gmail.main(Gmail.java:281)
Caused by: com.sun.mail.iap.BadCommandException: A4 BAD Could not parse command
     at com.sun.mail.iap.Protocol.handleResult(Protocol.java:346)
     at com.sun.mail.imap.protocol.IMAPProtocol.fetchSequenceNumber(IMAPProtocol.java:1363)
     at com.sun.mail.imap.IMAPFolder.getMessageByUID(IMAPFolder.java:1883)
     ... 2 more
Google turns up nothing for this Exception message.
Has anyone else seen this?

Answer 1

Could be a Gmail bug.
What version of JavaMail are you using?
Can you add "session.setDebug(true);" and post the protocol trace showing
what command is causing the exception?
Also, be sure to read the JavaMail FAQ entries about Gmail.
Finally, you probably want to use Session.getInstance instead of Session.getDefaultInstance,
although it has nothing to do with this problem.