Release Announcement v0.12.5 Apache IoTDB v0.12.5 已经发布，在此版本中，我们修复了一些 Bug，并对内存控制和查询线程模型进行了一些改进。此外，我们在此版本中添加了一个名为"extreme"的聚合函数，并提供了一个用于拆分 TsFile 的工具。 欢迎在我们的网站下载最新版本:https://iotdb.apache.org/Download/ Release Notes ## New Features* [IOTDB-2078] Split large TsFile tool* [IOTDB-2192] Support extreme function ## Improvements* [IOTDB-1297] Refactor the memory control when enabling time partitions* [IOTDB-2195] Control the concurrent query execution thread* [IOTDB-2475] Remove sg not ready log in batch process* [IOTDB-2502] Add query sql in error log if encountering exception* [IOTDB-2506] Refine the lock granularity of the aggregation query* [IOTDB-2534] add character support while using double quote* [IOTDB-2562] Change default value of sync mlog period parameter* Avoid too many warning logs being printed, when opening too many file handlers ## Bug Fixes * [IOTDB-1960] Fix count timeseries bug in cluster mode* [IOTDB-2174] Fix Regexp filter serializing and deserializing error* [IoTDB-2185] fix get an exception bug when parsing the header of CSV* [IOTDB-2194] Fix SHOW TIMESERIES will only display 2000 timeseries in cluster mode* [IOTDB-2197] Fix datatype conversion exception in Spark Connector* [IOTDB-2209] Fix logback CVE-2021-42550 issue* [IOTDB-2219] Fix query in-memory data is incorrect in cluster mode* [IOTDB-2222] Fix OOM and data was written in incorrectly bugs of Spark Connector* [IOTDB-2251] [IOTDB-2252] Fix Query deadlock* [IOTDB-2282] fix tag recover bug after tag update* [IOTDB-2320] MemoryLeak cause by wal Scheduled trim task thread* [IOTDB-2381] Fix deadlock caused by incorrect buffer pool size counter* [IOTDB-2400] Fix series reader bug* [IOTDB-2426] WAL deadlock caused by too many open files* [IOTDB-2445] Fix overlapped data should be consumed first bug* [IOTDB-2499] Fix division by zero error when recovering merge* [IOTDB-2507] Fix NPE when merge recover* [IOTDB-2528] Fix MLog corruption and recovery bug after killing system* [IOTDB-2532] Fix query with align by device can't get value after clear cache* [IOTDB-2533] Fix change max_deduplicated_path_num does not take effect* [IOTDB-2544] Fix tag info sync error during metadata sync* [IOTDB-2550] Avoid show timeseries error after alter tag on sync sender* [IOTDB-2567] Fix thread and ByteBuffer leak after service stopped* [IOTDB-2568] "show query processlist" is blocked* [IOTDB-2580] Fix DirectByteBuffer and thread leak when deleting storage group* [IOTDB-2584] Fix cross space compaction selector* [IOTDB-2603] Fix compaction recover* [IOTDB-2604] Fix batch size is invalid in import-csv tool* [IOTDB-2620] Unrecognizable operator type (SHOW) for AuthorityChecker* [IOTDB-2624] Fix "overlapped data should be consumed first" occurs when executing query* [IOTDB-2640] Fix cross compaction recover bug* [IOTDB-2641] Fix time range of TsFile resource overlaps after unseq compaction* [IOTDB-2642] Fix the new file has a higher compact priority than the old file in unseq compaction* Fix a logical bug in processPlanLocally in cluster mode* Throw Exception while using last query with align by device* Add a judgement to determine raft log size can fit into buffer before log appending in cluster mode* Fix grafana can't be used bug 编辑：黄继彦
