[infinispan-dev] X-Site: Site Unreachable vs. Site Down

Hi all, For the X-Site pull request, Bela, Mircea and I had a design review. One of the items that came up was the ability to mark a site as being “down” – where a site has been unreachable for a period of time. This mostly applies to the synchronous replication case where the backup failure policy has been configured as “FAIL”, i.e: <namedCache name="importantCache">  <sites>   <backups> <backup site="NYC" strategy="SYNC" backupFailurePolicy="FAIL" timeout="16000 0"/> </backups> </sites> </namedCache> The current implementation would be to fail all requests until a SA realizes the site is offline and mark it through a JMX operation (provided in this release?). Since I cannot afford a 100% failure rate until somebody gets called, I think we need to take it a step further and add an element to mark a site as offline after a period of time. (Note, though, a site can only be brought back online manually.) Mircea talked about adding an element in the configuration for a custom callback implementation. However, I think this is useful enough -- not only for me -- but for other ISPN/JDG users as well. (Not to mention we can't add configuration for callbacks) Comments? Thanks, Erik