* Disallow join requests when already part of a cluster
* Remove wipe state when joining, since join can only be
performed from empty state
* When trying to join, only accept gossip from that member
* Ignore gossips from unknown (and unreachable) members
* Make sure received gossip contains selfAddress
* Test join of fresh node with same host:port
* Remove JoinTwoClustersSpec
* Welcome message as reply to Join
* Retry unsucessful join request
* AddressUidExtension
* Uid in cluster Member identifier
To be able to distinguish nodes with same host:port
after restart.
* Ignore gossip with wrong uid
* Renamed Remove command to Shutdown
* Use uid in vclock identifier
* Update sample, Member apply is private
* Disabled config duration syntax and cleanup of io settings
* Update documentation
* Config of node roles cluster.role
* Cluster router configurable with use-role
* RoleLeaderChanged event
* Cluster singleton per role
* Cluster only starts once all required per-role node
counts are reached,
role.<role-name>.min-nr-of-members config
* Update documentation and make use of the roles in the examples
* Problem may occur when joining member with same hostname:port again,
after downing.
* Reproduced with StressSpec exerciseJoinRemove with fixed port that
joins and shutdown several times.
* Real solution for this will be covered by ticket #2788 by adding
uid to member identifier, but as first step we need to support
this scenario with current design.
* Use unique node identifier for vector clock to avoid mixup of
old and new member instance.
* Support transition from Down to Joining in Gossip merge
* Don't gossip to unknown or unreachable members.
* When a def starts with if and is not a oneliner the if
should be on a new line.
* The reason is that it might be easy to miss the if when
reading the code.
* Renamed isRunning to isTerminated (with negation of course)
* Removed Running from JMX API, since the mbean is deregistered anyway
* Cleanup isAvailable, isUnavailbe
* Misc minor
* MBeanSpec
* Added Members and Unreachable to JMX API
* Removed Convergence from JMX API, because it will
not be exposed when ticket #2692 is merged
* Updated documentation and akka-cluster script
* Defined the domain events in ClusterEvent.scala file
* Produce events from diff and publish publish to event bus
from separate actor, ClusterDomainEventPublisher
* Adjustments of tests
