Fix bug for multi path file loading. Opt code checking for multi-path commitlog path in storePathCommitLog.

change default value of org.apache.rocketmq.store.config.MessageStoreConfig#MULTI_PATH_SPLITTER to ',' and can be changed by System.getProperty("rocketmq.broker.multiPathSplitter")

Signed-off-by: Nzhangyang21 <zhangyang21@xiaomi.com>

[ISSUE 3194] [PART A] Use LongAdder instead of AtomicLong in BrokerStatsService to improve performance. (#3195)

[ISSUE 2883] Improve performance of string2messageProperties/messageProperties2String, and save 1 byte for each message.

* Remove putMessage/putMessages method in CommitLog which has too many duplicated code.

* Optimise performance of asyncPutMessage (extract some code out of putMessage lock)

* extract generation of msgId out of lock in CommitLog (now only for single message processor)

* extract generation of topicQueueTable key out of sync code

* extract generation of msgId out of lock in CommitLog (for batch)

* fix ipv6 problem introduced in commit "Optimise performance of asyncPutMessage (extract some code out of putMessage lock)"

* implement issue-690

* add unit test

* fix version

* fix wroteOffset;update version;polish

* polish

* fix wrong wroteOffset of AppendMessageResult

* move serialization out of lock in async method

* enhancement(dledger):implement asyncPutMessage in dledger commitlog

* enhancement(dledger):move serialization out of lock

* fix(dledger):fix the issue that queueOffset is overwritten

* fix(dledger):fix the issue that get wrong queueOffset

* test(dledger):add dledgerCommitlog put messages async unit test

* chore(dledger): fix the issue that cannot find symbol of variable SCHEDULE_TOPIC

* [ISSUE# 2330]store the properties of MessageBatch

* [ISSUE# 2330]fix style problem

* [ISSUE# 2330]Undo newly added property in the MessageBatch
Co-authored-by: Nwufc <wufc@viomi.com>

* feature(dledger):upgrade dledger version and support preferred leader/batch push

* feature(dledger):pass the failed UT and pass the CI

2. fix properties when store message
3. add IT for transaction
4. correct resonse code when slave down

optimization : change SYNC_MASTER flushSlave/flushDisk to pipeline to reduce produce latency and improve throughput

* Remove the useless files

* Replace PermSize with MetaspaceSize, details see http://openjdk.java.net/jeps/122

* Update DLedgerCommitLog.java (#1145)

Delete useless code

* Remove the duplicate content

* Polish the comment (#1107)

* Minor Typo fix  (#860)

* [ISSUE #1082] Fix disconnection of HA (#1083)

* fixed the text description in chinese doc (#1339)

* fix /dev/shm not found on some OSs (#1345)

* Refactor the protection logic when pulling

* change the MQVersion variable to rocketmq 4.5.2 version;

* Minor polish

* Fix the wrong package name

* [maven-release-plugin] prepare release rocketmq-all-4.5.2

* [maven-release-plugin] prepare for next development iteration

* [RIP-15]Add Ipv6 support for RocketMQ

[RIP-10]Optimize the test case for DefaultMessageStore.CleanCommitLogService and DefaultMessageStore.CleanConsumeQueueService (#939)

[RIP-10]Optimize the test case for DefaultMessageStore.CleanCommitLogService and DefaultMessageStore.CleanConsumeQueueService

[RIP-10]HA test case optimization and reduce the time spent

[RIP-10] Fix-ScheduleMessageServiceTest

[RIP-10]fix-bug: ScheduleMessageServiceTest 

[RIP-10]  Add test cases for DefaultMessageStore.CleanCommitLogService and DefaultMessageStore.CleanConsumeQueueService (#836)

[RIP-10]  Add test cases for DefaultMessageStore.CleanCommitLogService and DefaultMessageStore.CleanConsumeQueueService

* Add test case for CommitLog.handleHA

* Add one UUID parent path for RocketMQ's files

[RIP-10] Fix junit bug in ScheduleMessageServiceTest

[RIP-10] Optimize test batch send message use cases

[RIP-10] Add  test cases of  ScheduleMessageService

[RIP-10]Add test cases for DefaultMessageStore which methods read from CommitLog/ConsumeQueue (#778)

[RIP-10]Add test cases for DefaultMessageStore which methods read from CommitLog/ConsumeQueue

[RIP-10]Add test cases for DefaultMessageStore.putMessages(MessageExtBatch)