java - cannot append a message to a folder in javax.mail -

i managing save simple messages containing body, subject etc. however, unable save multipart messages. logged before , after appendmessages, noticed second log absent. interestingly, have no exceptions being fired @ all. have absolutely no idea going wrong here.

here java code:

    store store = null;     folder folder = null;     string foldername = "sentbox";     try {         session session = preparesession(mailprotocols.imap, kid);         store = session.getstore("imap");         store.connect(myhost, user.getlogin(), user.getpassword());         folder = store.getfolder(foldername);          if (folder == null || !folder.exists()) {             folder.create(folder.holds_messages);         }         folder.open(folder.read_write);         mimemessage mimemessage = new mimemessage(session);         address[] = null;         if(msg.getto() != null) { // msg instance of custom message class, nothing special there             int msgsize = msg.getto().size();              = new internetaddress[msgsize];             (int = 0; < msgsize; i++) {                 to[i] = new internetaddress(msg.getto().get(i));             }         }          mimemessage.setrecipients(recipienttype.to, to);         mimemessage.setsentdate(new date(system.currenttimemillis()));         mimemessage.setsubject(msg.getsubject());          if (msg.getfiles() != null) {             mimemultipart mp = new mimemultipart();             mimebodypart newpart = new mimebodypart();             newpart.settext(msg.getbody());             mp.addbodypart(newpart);             (multipartfile multipartfile : msg.getfiles()) {                 try {                     newpart = new mimebodypart(); // create new part each files                     newpart.addheader("my-file-type", multipartfile.getcontenttype());                     file tmpfile = file.createtempfile("newattachment", ".tmp");                     multipartfile.transferto(tmpfile);                     filedatasource fds = new filedatasource(tmpfile);                     newpart.setdatahandler(new datahandler(fds));                     newpart.setfilename(multipartfile.getoriginalfilename());                     newpart.setdisposition(part.attachment);                     mp.addbodypart(newpart);                     tmpfile.deleteonexit();                 } catch (ioexception e) {                     logger.debug("can not create temp file ===========>");                     e.printstacktrace();                 }             }             mimemessage.setcontent(mp);             mimemessage.savechanges();         } else {             mimemessage.settext(msg.getbody());         }          folder.appendmessages(new message[] {mimemessage});          message[] allmessages = folder.getmessages();         uidfolder uidfolder = (uidfolder) folder;         long savedmsgid = uidfolder.getuid(allmessages[allmessages.length - 1]);                     logger.info("savedmsgid",savedmsgid + "") //cannot output @      } catch (exception e) {         logger.error(e);      } {         closemailstore(store, folder); // simple method closes store     } 

i using apache james 3.0.4. approaches welcome

i using apache james 3.0.4

don't mean apach james 3.0-beta4? i.e. haven't yet reached 3.0 release, there no 3.0.4. reason you're not using stable release (2.3.2)? asking... :-)

i logged before , after appendmessages, noticed second log absent.

if never logging code after folder.appendmessages(new message[] {mimemessage});, there 3 possibilities:

1. an error (or throwable) being thrown inside javax.mail / io code.
   examples include ioerror (nasty io interfacing failure), linkageerror (incompatible jars/classes) or codermalfunctionerror (thrown charsetdecoder or charsetencoder if decoding/encoding loop throws unexpected exception).
2. thread problems cause program reach standstill - i.e. thread starvation or deadlock
3. jvm process crash

item (1) by far probable here. suggestion: change tail-end of code to:

} catch (exception e) {     logger.error(e);  } catch (throwable t) {     logger.error(t);  } {     closemailstore(store, folder); // simple method closes store } 

if logs throwable, can investigate cause in terms of app jars & configuration, os/jvm version, or data content...

if doesn't log throwable, can investigate (2) or (3).