- Asynchronous lockless remoting
- Pluggable transport drivers
- Multiple transport support
- Simplified lifecycle events
- Support for netty based TCP, SSL+TCP and UDP support
- Updated Akka protocol with soft-state connections and failure detection
- Refactored failure detectors (currently duplicated from cluster)
* Previously heartbeat messages was sent to all other members, i.e.
each member was monitored by all other members in the cluster.
* This was the number one know scalability bottleneck, due to the
number of interconnections.
* Limit sending of heartbeats to a few (5) members. Select and
re-balance with consistent hashing algorithm when new members
are added or removed.
* Send a few EndHeartbeat when ending send of Heartbeat messages.
- also remove resetReceiveTimeout and change receiveTimeout() to return
a Duration (which may be Undefined)
- also move akka.actor.{cell -> dungeon}, because that is
+ an adequate name
+ and does not coincide with the lowercase version of a class name
* Added publishCurrentClusterState and sendCurrentClusterState
* Removed Ping/Pong that was used for some tests, since awaitCond is
now needed anyway, since publish to eventStream is done afterwards
* Major refactoring to remove the need to use special
Cluster instance for testing. Use default Cluster
extension instead. Most of it is trivial changes.
* Used failure-detector.implementation-class from config
to swap to Puppet
* Removed FailureDetectorStrategy, since it doesn't add any value
* Added Cluster.joinSeedNodes to be able to test seedNodes when Addresses
are unknown before startup time.
* Removed ClusterEnvironment that was passed around among the actors,
instead they use the ordinary Cluster extension.
* Overall much cleaner design
* Gossip is not exposed in user api
* Better and more events
* Snapshot event sent to new subscriber
* Updated tests
* Periodic publish only for internal stats
* Trying to simultaneously resolving conflicts at several nodes creates new conflicts.
Therefore the leader resolves conflicts to limit divergence. To avoid overload there
is also a configurable rate limit of how many conflicts that are handled by second.
* Netty blocks when sending to broken connections. ClusterHeartbeatSender actor
isolates sending to different nodes by using child workers for each target
address and thereby reduce the risk of irregular heartbeats to healty
nodes due to broken connections to other nodes.
* Essentially as already described in cluster specification,
but now fully implemented and tested with LargeClusterSpec
* Gossip to nodes with different view (using seen table)
with certain probability
* Gossip chat, gossip back to sender
* Immediate gossip to joining node
* Updated some tests to reflect current implementation
