Apache Qpid JMS 0.21.0 发布了，Qpid JMS 是一个使用 Qpid Proton 协议引擎的 Java Message Service 客户端。.
该版本支持 Advanced Message Queuing Protocol 1.0 (AMQP 1.0, ISO/IEC 19464,http://www.amqp.org)。
QPIDJMS-244 - Connection close does not wait for acknowledgement of in-flight message delivery with asyncronous auto-ack MessageConsumer
QPIDJMS-258 - Reduce the amount of allocation done in the consumer on async message dispatch
QPIDJMS-267 - Support discovery of failover hosts provided in a connection property of the Open frame
QPIDJMS-270 - update to proton-j 0.18.0
QPIDJMS-271 - Cache transaction state dispostions for TXN producers and consumers
QPIDJMS-231 - closing a consumer used since prior commit/rollback holds its prefetched messages until the next commit/rollback
QPIDJMS-256 - Closing a consumer that was used in a transaction does not stop message dispatching unitl next commit or rollback
QPIDJMS-257 - Messages delivered from a consume in client acknowledge mode cannot be acknowledged after the consumer is closed
QPIDJMS-266 - Race on session start and message dispatch can deliver messages in wrong order
QPIDJMS-269 - Performance regression affecting MessageProducer on transacted Sessions.
QPIDJMS-272 - fail fast when attempting connection to a server using unexpected protocol type
QPIDJMS-262 - Update ActiveMQ Dependency to latest 5.14.3
QPIDJMS-268 - Update Netty to 4.1.8.Final
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