The version is updated as follows:

feature：

• [#2381] support XA transaction mode
• [#2206] support REQUIRED、REQUIRES_NEW、SUPPORTS and NOT_SUPPORTED transaction propagation
• [#2112] support batch update and delete with multiple sql
• [#2275] support hsf on TCC transaction mode
• [#2108] support zip bzip2 7z compressor
• [#2328] support for isolated loading of mysql 5.x and 8.x jdbc drivers classes
• [#2367] add permission configuration support for Nacos 1.2
• [#2359] support propagation.never, propagation.mandatory and transaction suspend and resume api
• [#2418] support fst serialization
• [#2135] support SPI scope
• [#2370] support failureHandler implement can be read from the container
• [#2481] support the max wait configuration for db
• [#2379] support custom service name when registering with Nacos
• [#2308] add switch to control whether to register branch on Saga transaction mode
• [#2301] support default expr and nextval for postgresql

bugfix：

• [#2575] fix executeBatch can not get targetSql in Statement mode
• [#2283] fix oracle get tableMeta fail
• [#2312] fix the judgement of configuration condition
• [#2309] fix timestamp deserialize lost nano
• [#2292] fix some configuration not converted to camel style
• [#2306] fix deprecated maven prerequisites
• [#2287] fix connection context can't be remove when global lock retry
• [#2361] fix the error configuration name
• [#2333] fix wrong exception information when rollback fails due to dirty data
• [#2390] fix configuration item containing spaces
• [#2408] fix missing sequence in undo_log table
• [#2391] fix configuration exceptions lead to increased CPU usage
• [#2427] fix StringUtils.toString(o) StackOverflowError
• [#2384] fix StateMachineRepository#getStateMachineById will replace the last version in cache
• [#2323] fix wrong proxy of datasource bean
• [#2466] fix memory visibility of active attribute in file mode
• [#2349] fix insert sql primary key value support check
• [#2479] fix postgresql schema when not use lowerCase
• [#2449] fix can't get table structure when startup
• [#2505] fix bug of session store path value judgment
• [#2456] fix server encode request error
• [#2495] fix the NPE and reduce the request when lockkey is null
• [#2490] fix RpcContext.addResource when resource is null
• [#2419] fix http testcase run failed
• [#2535] fix wrong configuration name in config.txt
• [#2524] registration service configuration missing and inconsistent
• [#2473] fix flush condition of disk in file mode
• [#2455] fix child module can't execute copyright and checkstyle inspection

optimize：

• [#2409] reduce the db and network request when undoLog or lockKey is empty
• [#2329] separate the different storage pattern processing logic
• [#2354] optimize the unsupported listener logic for spring cloud config
• [#2320] optimize protostuff and kryo serialize timestamp
• [#2307] optimize transaction context switch logic when switch transaction mode
• [#2364] optimize generated instances that were not actually used when the class was loaded
• [#2368] add zk missing configuration
• [#2351] add get local global status
• [#2529] optimize druid parameter
• [#2288] codecov.yml ignore mock test
• [#2297] remove duplicated dependency
• [#2336] add using organization logos
• [#2348] remove redundant configuration
• [#2362] optimize stackTraceLogger param
• [#2382] optimize RegistryFactory singleton pattern and RegistryType judgement
• [#2400] optimize the magic num of date at UUIDGenerator
• [#2397] fix typo
• [#2407] inaccurate judgment may be lead to NPE
• [#2402] optimize the rm and tm register log
• [#2422] add link of script in document
• [#2440] optimize contact us and startup log
• [#2445] optimize the class registration method for kryo and fst
• [#2372] refactor lock store sql with SPI
• [#2453] optimize unnecessary server configuration item
• [#2369] refactor log store sql with SPI
• [#2526] optimize spring-boot startup log
• [#2530] remove use connPool
• [#2489] optimize exceptionHandler's method signature
• [#2494] reduce the redundant code
• [#2523] optimize abnormal global transaction's output logs by frequency
• [#2549] optimize the exception log for ZookeeperConfiguration
• [#2558] optimize config and server module log
• [#2464] enhance Saga transaction editor
• [#2553] add some notes about using scripts

Thanks to these contributors for their code commits. Please report an unintended omission.

• slievrly
• a364176773
• ph3636
• lightClouds917
• l81893521
• jsbxyyx
• objcoding
• CharmingRabbit
• xingfudeshi
• lovepoem
• SevenSecondsOfMemory
• zjinlei
• ggndnn
• tauntongo
• threefish
• helloworlde
• long187
• jaspercloud
• dk-lockdown
• wxbty
• sharajava
• ppj19891020
• YuKongEr
• Zh1Cheung
• wangwei-ying
• mxszs
• q294881866
• HankDevelop

Also, we receive many valuable issues, questions and advices from our community. Thanks for you all.