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new 971ab0e [Doc]--Update documents for support consumer priority level
in failover mode (#7136)
971ab0e is described below
commit 971ab0e2777900b2e8cf9d11c60e60bfd8842ffc
Author: HuanliMeng <[email protected]>
AuthorDate: Thu Jun 4 21:09:44 2020 +0800
[Doc]--Update documents for support consumer priority level in failover
mode (#7136)
This doc is updated for the Pulsar 2.4.0 released PR: #2954.
The doc is updated for the master right now. once it is reviewed and
approved, it will be added to the previous releases.
---
site2/docs/concepts-messaging.md | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/site2/docs/concepts-messaging.md b/site2/docs/concepts-messaging.md
index 919bd34..5805971 100644
--- a/site2/docs/concepts-messaging.md
+++ b/site2/docs/concepts-messaging.md
@@ -207,11 +207,11 @@ In the diagram below, only **Consumer A-0** is allowed to
consume messages.
### Failover
-In *failover* mode, multiple consumers can attach to the same subscription.
The consumers will be lexically sorted by the consumer's name and the first
consumer will initially be the only one receiving messages. This consumer is
called the *master consumer*.
+In *failover* mode, multiple consumers can attach to the same subscription. In
failover mode, the broker selects the master consumer based on the priority
level and the lexicographical sorting of a consumer name. If two consumers have
an identical priority level, the broker selects the master consumer based on
the lexicographical sorting. If these two consumers have different priority
levels, the broker selects the consumer with a higher priority level as the
master consumer. The master [...]
-When the master consumer disconnects, all (non-acked and subsequent) messages
will be delivered to the next consumer in line.
+For partitioned topics, the broker assigns partitioned topics to the consumer
with the highest priority level. If multiple consumers have the highest
priority level, the broker evenly assigns topics to consumers with these
consumers.
-In the diagram below, **Consumer-B-0** is the master consumer while
**Consumer-B-1** would be the next in line to receive messages if
**Consumer-B-0** disconnected.
+In the diagram below, **Consumer-B-0** is the master consumer while
**Consumer-B-1** would be the next consumer in line to receive messages if
**Consumer-B-0** is disconnected.
