New Feature

• [IOTDB-5919]show variables add a variable timestamp_precision
• Add Python SessionPool

Improvement/Bugfix

• [IOTDB-5901] Load: load tsfile without data will throw NPE
• [IOTDB-5903] Fix cannot select any inner space compaction task when there is only unsequence data
• [IOTDB-5878] Allow ratis-client retry when gRPC IO Unavailable
• [IOTDB-5939] Correct Flusing Task Timeout Detect Thread
• [IOTDB-5905] Fix aligned timeseries data point lost after flushed in some scenario
• [IOTDB-5963] Make sure that TsBlock blocked on memory is added in queue before the next TsBlock returned by root operator
• [IOTDB-5819] Fix npe when booting net metrics
• [IOTDB-6023] Pipe: Fix load tsfile error while handling empty value chunk
• [IOTDB-5971] Fix potential QUOTE problem in iotdb reporter
• [IOTDB-5993] ConfigNode leader changing causes lacking some DataPartition allocation result in the response of getOrCreateDataPartition method
• [IOTDB-5910] Fix compaction scheduler thread pool is not shutdown when aborting compaction
• [IOTDB-6056] Pipe: Failed to load tsfile with empty pages (NPE occurs when loading)
• [IOTDB-5916]Fix exception when file is deleted during compaction selection
• [IOTDB-5896] Fix the NPE issue when taking snapshot in WAL combined with Aligned Binary
• [IOTDB-5929] Enable DataPartition inherit policy
• [IOTDB-5934] Optimize cluster partition policy
• [IOTDB-5926] Remove Useless Rater in Timer
• [IOTDB-6030] Improve efficiency of ConfigNode PartitionInfo takeSnapshot
• [IOTDB-5997] Improve efficiency of ConfigNode PartitionInfo loadSnapshot
• Fix potential deadlock when freeing memory in MemoryPool
• Release resource of FI after all drivers have been closed
• Set default degree of parallelism back to the num of CPU
• Make SequenceStrategy and MaxDiskUsableSpaceFirstStrategy are allowed in cluster mode
• Fix npe exception when invalid in metric module
• Fix CQ does not take effect in ns time_precision
• Fix storage engine memory config initialization
• Fix template related schema query
• add default charset setting in start-datanode.bat and print default charset when starting
• Fix TsfileResource error after delete device in sequence working memtable
• load TsFile bugs: Not checking whether the tsfile data loaded locally is in the same time partition during the loading process & LoadTsFilePieceNode error when loading tsfile with empty value chunks
• Fix alias query failure after restarting DataNode