[jboss-jira] [JBoss JIRA] (JGRP-1732) UNICAST/NAKACK: threads from the internal thread pool should not do work stealing

[Bela Ban (JIRA)]

Bela Ban created JGRP-1732:
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             Summary: UNICAST/NAKACK: threads from the internal thread pool should not do work stealing
                 Key: JGRP-1732
                 URL: https://issues.jboss.org/browse/JGRP-1732
             Project: JGroups
          Issue Type: Enhancement
            Reporter: Bela Ban
            Assignee: Bela Ban
             Fix For: 3.4.1, 3.5


In NAKACK\{2\} and UNICAST\{2,3\}, threads from all thread pools (regular, OOB and internal) add messages to the table, then grab as many (ordered) messages as possible from the table and pass them up.
This could lead to the case where an internal thread passes up regular or OOB messages, which might block. There's a (small) chance that this exhausts the internal thread pool.
Internal threads should therefore never block, and never steal work from other thread pools.
SOLUTION:
* An internal thread only adds the message to the table and passes it up if in order
* If the internal message is OOB, it is passed up and then the thread returns


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