raboof/pekko
1
0
Fork 0
Code Issues Pull requests Projects Releases 6 Packages Wiki Activity Actions 10

Promote WeaklyUp and enable by default, #22197

Browse source
This commit is contained in:
Patrik Nordwall 2017-01-24 12:31:32 +01:00
parent d1ba2c1aae
commit 1700cdaebc
14 changed files with 41 additions and 64 deletions
Download patch file Download diff file Expand all files Collapse all files

24
akka-docs/rst/scala/cluster-usage.rst
View file

@ -202,31 +202,19 @@ If a node is ``unreachable`` then gossip convergence is not possible and therefo
``leader`` actions are also not possible. However, we still might want new nodes to join
the cluster in this scenario.
.. warning::
The WeaklyUp feature is marked as **“experimental”** as of its introduction in Akka 2.4.0. We will continue to
improve this feature based on our users’ feedback, which implies that while we try to keep incompatible
changes to a minimum the binary compatibility guarantee for maintenance releases does not apply this feature.
This feature is disabled by default. With a configuration option you can allow this behavior::
akka.cluster.allow-weakly-up-members = on
When ``allow-weakly-up-members`` is enabled and there is no gossip convergence,
``Joining`` members will be promoted to ``WeaklyUp`` and they will become part of the
cluster. Once gossip convergence is reached, the leader will move ``WeaklyUp``
``Joining`` members will be promoted to ``WeaklyUp`` and become part of the cluster if
convergence can't be reached. Once gossip convergence is reached, the leader will move ``WeaklyUp``
members to ``Up``.
This feature is enabled by default, but it can be disabled with configuration option::
akka.cluster.allow-weakly-up-members = off
You can subscribe to the ``WeaklyUp`` membership event to make use of the members that are
in this state, but you should be aware of that members on the other side of a network partition
have no knowledge about the existence of the new members. You should for example not count
``WeaklyUp`` members in quorum decisions.
.. warning::
This feature is only available from Akka 2.4.0 and cannot be used if some of your
cluster members are running an older version of Akka.
.. _cluster_subscriber_scala: