[jboss-jira] [JBoss JIRA] Resolved: (JGRP-393) NAKACK/UNICAST: headers are removed from message when passing the message up; retransmit will fail

NAKACK/UNICAST: headers are removed from message when passing the message up; retransmit will fail --------------------------------------------------------------------------------------------------- Key: JGRP-393 URL: http://jira.jboss.com/jira/browse/JGRP-393 Project: JGroups Issue Type: Bug Affects Versions: 2.4 Reporter: Bela Ban Assigned To: Bela Ban Fix For: 2.5 Issue appears with UNICAST or NAKACK, example below uses NAKACK: - Message M1 is received and placed into received_msgs. M1 has a FragHeader attached (FRAG2 was somewhere above NAKACK) - M1 is retrieved from received_msgs and passed up - FRAG2 *removes* the FragHeader - A retransmission request is received for M1 - M1 is retrieved from received_msgs and passed down. Problem: the FragHeader is missing ! The receiver will not recognize M1 as a fragment and FRAG2 will *not* handle M1 ! SOLUTION 1: all protocols (maybe only the ones above UNICAST/NAKACK) should *never* remove headers. We could ensure this is the case by simply making removeHeader() a no-op SOLUTION 2: investigate into who owns the message and who is allowed to modify it. Look into sealing techniques