i was testing MDL-28023 when i ran into some moodle jabber misconfiguration.

seeing this wasn't too helpful to me:

Processing module function assignment_cron ...Processing assignment submission 119

Warning: fclose() expects parameter 1 to be resource, null given in /home/aparup/mcode/m20/mysql/moodle/lib/jabber/XMPP/XMLStream.php on line 403

Call Stack:
0.0003 637232 1.

() /home/aparup/mcode/m20/mysql/moodle/admin/cron.php:0
0.1227 24470672 2. cron_run() /home/aparup/mcode/m20/mysql/moodle/admin/cron.php:79
0.3096 44281984 3. assignment_cron() /home/aparup/mcode/m20/mysql/moodle/lib/cronlib.php:87
0.3472 48582056 4. message_send() /home/aparup/mcode/m20/mysql/moodle/mod/assignment/lib.php:2627
0.3755 49419608 5. message_output_jabber->send_message() /home/aparup/mcode/m20/mysql/moodle/lib/messagelib.php:172
1.1891 49487232 6. XMPPHP_XMLStream->processUntil() /home/aparup/mcode/m20/mysql/moodle/message/output/jabber/message_output_jabber.php:75
2.7677 49502848 7. XMPPHP_XMLStream->__process() /home/aparup/mcode/m20/mysql/moodle/lib/jabber/XMPP/XMLStream.php:471
2.7678 49508696 8. xml_parse() /home/aparup/mcode/m20/mysql/moodle/lib/jabber/XMPP/XMLStream.php:420
2.7680 49513808 9. XMPPHP_XMLStream->endXML() /home/aparup/mcode/m20/mysql/moodle/lib/jabber/XMPP/XMLStream.php:0
2.7681 49515344 10. XMPPHP_XMPP->sasl_failure_handler() /home/aparup/mcode/m20/mysql/moodle/lib/jabber/XMPP/XMLStream.php:567
2.7681 49515344 11. XMPPHP_XMLStream->disconnect() /home/aparup/mcode/m20/mysql/moodle/lib/jabber/XMPP/XMPP.php:308
2.7683 49515568 12. XMPPHP_XMLStream->processUntil() /home/aparup/mcode/m20/mysql/moodle/lib/jabber/XMPP/XMLStream.php:358
3.0390 49507784 13. XMPPHP_XMLStream->__process() /home/aparup/mcode/m20/mysql/moodle/lib/jabber/XMPP/XMLStream.php:471
3.0392 49510800 14. fclose() /home/aparup/mcode/m20/mysql/moodle/lib/jabber/XMPP/XMLStream.php:403

i eventually found out that the jabber server and the jabber host was setup incorrectly.

it would be nice to have either a better explanation of the terms used there or atleast a quick connection test.

it would also be nice to clarify that messaging profile page : Jabber ID - should have a format akin to userid@moodleisticdomain.org