Release Notes

2.6.6

Enhancement / New feature：

• tag route. #3065
• Use Netty4 as default Netty version. #3029
• upporting Java 8 Date/Time type when serializing with Kryo #3519
• supoort config telnet #3511
• add annotation driven in MethodConfig and ArgumentConfig #2603
• add nacos-registry module #3296
• add protocol attribute in @Rerefence #3555 *support the hierarchical interface in @Service #3251
• change the default behavior in @EnableDubboConfig.multiple() #3193
• inline source code of spring-context-support #3192
• Simplify externalized configuration of Dubbo Protocol name #3189

BugFix：

• update hessian-lite to 2.3.5, fix unnecessary class load #3538
• Fix unregister when client destroyed（referenceconfig#destroy) #3502
• SPI entires dup by 3 times #3315
• fix Consumer throws RpcException after RegistryDirectory notify in high QPS #2016
• fix NPE in @Reference when using Junit to test dubbo service #3429
• fix consuer always catch java.lang.reflect.UndeclaredThrowableException for any exception throws in provider #3386
• fix the priority of DubboConfigConfigurationSelector #2897
• fix @Rerefence#parameters() not work #2301

2.6.5

Enhancements / Features：

• Reactor the generation rule for @Service Bean name #2235
• Introduce a new Spring ApplicationEvent for ServiceBean exporting #2251
• [Enhancement] the algorithm of load issue on Windows. #1641
• add javadoc to dubbo-all module good first issue. #2600
• [Enhancement] Reactor the generation rule for @Service Bean name type/enhancement #2235
• Optimize LeastActiveLoadBalance and add weight test case. #2540
• Smooth Round Robin selection. #2578 #2647
• [Enhancement] Resolve the placeholders for sub-properties. #2297
• Add ability to turn off SPI auto injection, special support for generic Object type injection. #2681

Bugfixes：

• @Service(register=false) is not work. #2063
• Our customized serialization id exceeds the maximum limit, now it cannot work on 2.6.2 anymore. #1903
• Consumer throws RpcException after RegistryDirectory notify in high QPS. #2016
• Annotation @Reference can't support to export a service with a sync one and an async one . #2194
• org.apache.dubbo.config.spring.beans.factory.annotation.ReferenceAnnotationBeanPostProcessor#generateReferenceBeanCacheKey has a bug. #2522
• 2.6.x Spring Event & Bugfix. #2256
• Fix incorrect descriptions for dubbo-serialization module. #2665
• A empty directory dubbo-config/dubbo-config-spring/src/test/resources/work after package source tgz. #2560
• Fixed 2.6.x branch a minor issue with doConnect not using getConnectTimeout() in NettyClient. (No issue). #2622
• Bean name of @service annotated class does not resolve placeholder. #1755

Issues and Pull Requests, check milestone-2.6.5.

2.6.4

Enhancements / Features

• Support access Redis with password, #2146
• Support char array for GenericService, #2137
• Direct return when the server goes down abnormally, #2451
• Add log for trouble-shooting when qos start failed, #2455
• PojoUtil support subclasses of java.util.Date, #2502
• Add ip and application name for MonitorService, #2166
• New ASCII logo, #2402

Bugfixes

• Change consumer retries default value from 0 to 2, #2303
• Fix the problem that attachment is lost when retry, #2024
• Fix NPE when telnet get a null parameter, #2453

UT stability

• Improve the stability by changing different port, setting timeout to 3000ms, #2501

Issues and Pull Requests, check milestone-2.6.4.

2.6.3

Enhancements / Features

• Support implicit delivery of attachments from provider to consumer, #889
• Support inject Spring bean to SPI by bean type, #1837
• Add generic invoke and attachments support for http&hessian protocol, #1827
• Get the real methodname to support consistenthash for generic invoke, #1872
• Remove validation key from provider url on Consumer side, config depedently, #1386
• Introducing the Bootstrap module as a unified entry for Dubbo startup and resource destruction, #1820
• Open TCP_NODELAY on Netty 3, #1746
• Support specify proxy type on provider side, #1873
• Support dbindex in redis, #1831
• Upgrade tomcat to 8.5.31, #1781

Bugfixes

• ExecutionDispatcher meet with user docs, #1089
• Remove side effects of Dubbo custom loggers on Netty logger, #1717
• Fix isShutdown() judge of Dubbo biz threadpool always return true, #1426
• Selection of invoker node under the critical condition of only two nodes, #1759
• Listener cann't be removed during unsubscribe when use ZK as registry, #1792
• URL parsing problem when user filed contains ‘@’, #1808
• Check null in CacheFilter to avoid NPE, #1828
• Fix potential deadlock in DubboProtocol, #1836
• Restore the bug that attachment has not been updated in the RpcContext when the Dubbo built-in retry mechanism is triggered, #1453
• Some other small bugfixes

Performance Tuning

• ChannelState branch prediction optimization. #1643
• Optimize AtomicPositiveInteger, less memory and compute cost, #348
• Introduce embedded Threadlocal to replace the JDK implementation, #1745

Hessian-lite

• Hessian deserialization optimization, #1705
• Support Locale type, #1761

Compatibilities
This release is compatible with other versions since 2.5.3, and you can upgrade smoothly.

• The RPC protocol version has been upgraded from 2.0.1 to 2.0.2, to support attachments delivery in #889, generally, the protocol version is used internally, so it should have no side effects on users.

Issues and Pull Requests, check milestone-2.6.3.

2.6.2

1. Hessian-lite serialization: revert locale serialization for compatibility, #1413
2. Asset transfer to ASF, including pom, license, DISCLAIMER and so on, #1491
3. Introduce of new dispatcher policy: EagerThreadpool, #1568
4. Separate monitor data with group and version, #1407
5. Spring Boot Enhancenment, #1611
6. Graceful shutdown enhancement
   • Remove exporter destroy logic in AnnotationBean.
   • Waiting for registry notification on consumer side by checking channel state.
7. Simplify consumer/provider side check in RpcContext, #1444.

Issues and Pull Requests, check milestone-2.6.2.