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Andrew Purtell commented on HBASE-9864: --------------------------------------- bq. You try to do "grant user" and it fails because one node is not responding within N seconds. by using the "heartbeat" everyone will be updated as soon as they can I'm a lot more concerned about a "revoke user" that doesn't get applied for hours because someone was napping. > Notifications bus for use by cluster members keeping up-to-date on changes > -------------------------------------------------------------------------- > > Key: HBASE-9864 > URL: https://issues.apache.org/jira/browse/HBASE-9864 > Project: HBase > Issue Type: Brainstorming > Reporter: stack > Priority: Blocker > Fix For: 1.0.0 > > > In namespaces and acls, zk callbacks are used so all participating servers > are notified when there is a change in acls/namespaces list. > The new visibility tags feature coming in copies the same model of using zk > with listeners for the features' particular notifications. > Three systems each w/ their own implementation of the notifications all using > zk w/ their own feature-specific watchers. > Should probably unify. > Do we have to go via zk? Seems like all want to be notified when an hbase > table is updated. Could we tell servers directly rather than go via zk? -- This message was sent by Atlassian JIRA (v6.2#6252)