[jboss-jira] [JBoss JIRA] Commented: (JGRP-934) NAKACK/UNICAST: atomic boolean vars might lead to message not getting processed immediately

[ https://jira.jboss.org/jira/browse/JGRP-934?page=com.atlassian.jira.plugi... ] Bela Ban commented on JGRP-934: ------------------------------- Actually, not true !!! The NakReceiverWindow.remove(processing) method removes a message and set 'processing' to false if msg == null *atomically* with respect to NakReceiverWindow.add(). Therefore we have the atomic blocks [ T1 adds message M1 and checks 'processing'] and [T2 removes a message msg If msg is null --> sets 'processing' to false If msg is not null --> continue and remove next message] If block 1 comes first and then block2 (remove() is blocked until add() is done): - Block 2 will 'see' M1 and remove and process it, T1 will terminate If block 2 comes first and then block 1 (add() is blocked by remove()): - T2 terminates and processing is false - T1 can set processing to true and removes M1 and processes it -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira