- [fix][c++] Fix UnknownError might be returned for a partitioned producer #15161
- [fix][c++] Fix connection is not closed when broker closes the connection to proxy #15009
- [fix][c++] Fix producer is never destructed until client is closed #14797
- [fix][c++] Fix segmentation fault when creating socket failed #14834
- [fix][c++] Fix send callback might not be invoked in key-based batching #14898
- [fix][c++] Fix single message metadata not set correctly #15072
- [fix][c++] Fix the race condition of connect timeout task #14823
- [fix][c++] Handle exception in creating socket when fd limit is reached #14587
- [fix][c++] Wait until event loop terminates when closing the Client #15316
- [fix][c++] Avoid race condition causing double callback on close #15508
- [improve][c++] Add braces around initialization of subobject #14735