[jboss-jira] [JBoss JIRA] (JGRP-1514) RELAY2: store-and-forward inter-site messages to prevent message loss when site master crashes

[Bela Ban (JIRA)]

Bela Ban created JGRP-1514:
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             Summary: RELAY2: store-and-forward inter-site messages to prevent message loss when site master crashes
                 Key: JGRP-1514
                 URL: https://issues.jboss.org/browse/JGRP-1514
             Project: JGroups
          Issue Type: Feature Request
            Reporter: Bela Ban
            Assignee: Bela Ban
             Fix For: 3.2


JGRP-1401 deals with crashes of the site master *within* the current site, and developed FORWARD_TO_COORD to deal with those temporary losses (a new coord will take over), to prevent message loss.

*This* JIRA is about preventing message loss caused by the site master of a *remote site* crashing. The general idea is to store-and-forward a message for a certain time and/or a certain number of attempts to forward.
The most frequent use case is probably that the site master of a remote site left (or crashed) and the new site master hasn't yet opened the bridge, so the message would be lost. Store-and-forward should help here.

If we still cannot forward the message for a (configurable) time and/or number of tries, we'll send a SITE_UNREACHABLE message back to the original sender of the message, which will then have to deal with it.

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