[jboss-jira] [JBoss JIRA] Commented: (JGRP-610) Problems with large return value and FC

[ http://jira.jboss.com/jira/browse/JGRP-610?page=comments#action_12385326 ] Bela Ban commented on JGRP-610: ------------------------------- Detailed explanation: - A unicast is received. This acquires a (sender-based) lockin UNICAST on its way up - When the message is received, the RpcDispatcher sends the large return value back *on the same thread* (the lock in UNICAST is not released) - FRAG2 splits the return message into many smaller messages - All messages are sent down, but when max_credits is exceeded, FC.down() blocks. This means the lock in UNICAST is *still* not released - On the receiver side (sender == receiver), incoming calls cannot reach FC due to the lock in UNICAST (because FC is somewhere above UNICAST), therefore FC will not send new credits (via OOB) to unblock the sender - The only way credits will be received is for the sender to periodically (max_block_time ms) send an OOB credit request and unblock when it receives the credit response - However, even OOB messages will not get processed when the default thread pool in TP has the queue *disabled* and all threads are *busy* ! -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.jboss.com/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira