[jboss-jira] [JBoss JIRA] Resolved: (JGRP-509) backoff-restart flush algorithm has a bug

[Vladimir Blagojevic (JIRA)]

     [ http://jira.jboss.com/jira/browse/JGRP-509?page=all ]

Vladimir Blagojevic resolved JGRP-509.
--------------------------------------

    Resolution: Done

Affected files:
FLUSH.java 1.54-->1.55

> backoff-restart flush algorithm has a bug
> -----------------------------------------
>
>                 Key: JGRP-509
>                 URL: http://jira.jboss.com/jira/browse/JGRP-509
>             Project: JGroups
>          Issue Type: Bug
>            Reporter: Michael Newcomb
>         Assigned To: Vladimir Blagojevic
>             Fix For: 2.5
>
>
> Consider FLUSH.startFlush():
> If the timeout expires on the flush_promise, the backoff-sleep algorithm kicks in. This sleeps for a random time and then tries calls startFlush again. The problem is that between the time that the flush_promise times out and startFlush is re-issued, the flush could have completed successfully, but it would go unnoticed, because after Util.sleep completes, the flush_promise is reset.
> Recommend using the flush_promise.getResultWithTimeout(timeout) alone and not Util.sleep(). The group is just as operational during flush_promise.getResultWithTimeout(timeout) as in Util.sleep().

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