Hi, Pulsar Community This thread is starting a vote for PIP-282.
PIP design PR: https://github.com/apache/pulsar/pull/20776 discussion thread: https://lists.apache.org/thread/69fpb0d30y7pc02k3zvg2lpb2lj0smdg Motivation Key_Shared has a mechanism called the "recently joined consumers" to keep message ordering. However, currently, it doesn't care about some corner cases. 1. [issue-1] The race condition in the "recently joined consumers", where consumers can be added before finishing reading and dispatching messages from ledgers. 2. [issue-2] Messages could be added to messagesToRedeliver without consumer-side operations such as unacknowledgement. We should care about these cases in Key_Shared subscription. Thanks, -- Yuri Mizushima equ...@apache.org
