Added: release/iotdb/0.13.4/RELEASE_NOTES.md ============================================================================== --- release/iotdb/0.13.4/RELEASE_NOTES.md (added) +++ release/iotdb/0.13.4/RELEASE_NOTES.md Tue Feb 14 03:52:23 2023 @@ -0,0 +1,1392 @@ +<!-- + + Licensed to the Apache Software Foundation (ASF) under one + or more contributor license agreements. See the NOTICE file + distributed with this work for additional information + regarding copyright ownership. The ASF licenses this file + to you under the Apache License, Version 2.0 (the + "License"); you may not use this file except in compliance + with the License. You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, + software distributed under the License is distributed on an + "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + KIND, either express or implied. See the License for the + specific language governing permissions and limitations + under the License. + +--> + +# Apache IoTDB 0.13.4 + +## New Feature + +* [IOTDB-3662] Add audit log +* [IOTDB-4675] Support load mlog.bin +* [IOTDB-4767] Support get all connection info in session api +* [IOTDB-4967] Fix slidingTimeWindow stops when encounter an empty window +* [IOTDB-5133] Export schema tool +* [IOTDB-5173] Add the statistics of flush point + +## Improvements + +* [IOTDB-4230] Modify the start script for flexible startup: add iotdb.in.sh, add pid file +* [IOTDB-4741] Deprecate sessionId in all rpc requests +* [IOTDB-4776] Change default storage group to root.__system in iotdb metric reporter +* [IOTDB-4946] Show Deadband Process Info +* [IOTDB-5025] Fix tag of metric in 0.13 +* [IOTDB-5127] Separate ISession as a module +* [IOTDB-5128] Perfect the usage of `-p pid`, `-v version` feature for start-server.sh +* [IOTDB-5232] Add Schema Memory Usage metric monitor +* [IOTDB-5346] Fix log error in MemtableFlushTask when recovering + + +## Bug Fix + +* [IOTDB-3624] Fix meet error when inserting data in SQL without timestamp +* [IOTDB-4716] Fix the statistics of disk size in linux system in 0.13 +* [IOTDB-4738] Fix TsFile damaged after writing empty value pages +* [IOTDB-4781] Fix the NOT LIKE value filter does not work +* [IOTDB-4842] Fix String number inserting bug +* [IOTDB-4938] Fix data are lost when meets exception `storage group not ready` +* [IOTDB-4939] Remove unsupport compress type +* [IOTDB-5136] NPE when use a null as username in session +* [IOTDB-5184] Fix CompressionType ArrayIndexOutOfBounds +* [IOTDB-5157] Fix "Invalid ID for ZoneOffset, invalid format:" +* [IOTDB-5206] Fix when target file is deleted in Compaction exception handler and recover +* [IOTDB-5225] Fix setting chunkPointNumLowerBound in IoTDBDescriptor +* [IOTDB-5236] DeleteData Python API cannot work +* [IOTDB-5253] Fix chunkMetadata mem metric +* [IOTDB-5266] Fix seq file may be lost when selecting cross compaction task +* [IOTDB-5281] Fix selecting deleted files in compaction +* [IOTDB-5286] Fix target files should not be select to participate in other compaction task +* [IOTDB-5296] Fix close session npe when session is null +* [IOTDB-5307] Fix failed to get TsFile input of file: NoSuchFileException +* [IOTDB-5311] Fix RunTimeException and NoSuchFile Exception when selecting files causing compaction scheduled thread to get stuck + +# Apache IoTDB 0.13.3 + +## Improvements + +* [IOTDB-4525] Accelerate restart process +* [IOTDB-3164] Add compaction memory control +* [IOTDB-4364] Reduce read amplification in compaction +* [IOTDB-4424] Specify error message when time value of insert sql can not be correctly parsed +* [IOTDB-4492] Control total file size of cross space compaction task +* [IOTDB-4542] Optimize schema validate error message +* Optimize pattern matching in Regexp + +## Bug Fixes + +* [IOTDB-3988] Fix reload problem of metric module and refactor metric module +* [IOTDB-4239] fix NPE to insert a null value into a TEXT timeseries +* [IOTDB-4318] Fix RESTAPI data type conversion failed +* [IOTDB-4320] Fix insert row with null cause recover throw NPE +* [IOTDB-4343] Fix NPE when using MQTT protocol +* [IOTDB-4357] fix start in windows, IOTDB_LOG_DIR_IS_UNDEFINED folder appears +* [IOTDB-4585] Incorrect query result after deleting data for aligned timeseries +* [IOTDB-4615] TTL adapts timestamp precision +* [IOTDB-4636] IndexOutOfBoundsException when compacting aligned series +* Fix PathAlreadyExistException during concurrent auto creating aligned timeseries + +# Apache IoTDB 0.13.2 + +## Improvements + +[IOTDB-2669] Improve C++ client insertTablet performance +[IOTDB-3087] enlarge default value of avg_series_point_number_threshold +[IOTDB-3861] Enable insert null values in Session +[IOTDB-3996] REST API nonQuery support Continuous Query +[IOTDB-4120] Optimize memory allocation of Expression +[IOTDB-4190] update documents about nifi-iotdb-bundle +REST support "select into" in nonQuery API +Import-CSV supports specify data type and no need quotation for text value + +## Bug Fixes + +[IOTDB-2736] DELETE_STORAGE_GROUP can not be granted to user (reporting 401) +[IOTDB-2760] Ordinary users do not grant any permissions, but can still show operations +[IOTDB-2769] Fix auth mapping of GRANT_ROLE_PRIVILEGE and GRANT_USER_ROLE +[IOTDB-3302] Without any authorization, ordinary users still have the right to query other user information +[IOTDB-4023] The C++ interface query result returns records error +[IOTDB-4047] Query NPE after change device alignment +[IOTDB-4096] Fix the names of metric pushed to Prometheus are inconsistency in micrometer and dropwizard +[IOTDB-4194] IOException happened in Compaction +[IOTDB-4215] Fix incorrect aggregate query results due to wrong unseq file traversal order +[IOTDB-4216] Fix execute create aligned timeseries but a non-aligned timeseries created +[IOTDB-4222] DeadLock when concurrently deleting and creating storage groups +[ISSUE-6774] Connection error when using DataGrip with JDBC driver +[ISSUE-6937] After restart, the aligned series turns to non-aligned +[ISSUE-6987] Fix select error when selecting a single quotation mark + +# Apache IoTDB 0.13.1 + +## New Features + +* [IOTDB-2602] "Without null" supports filtering based on partial columns +* [IOTDB-3873] Aligned timeseries support single point fill query +* [ISSUE-6171] Support createTimeseriesOfTemplate in Session +* [IOTDB-3742] Support COUNT NODES by root.** + +## Improvements + +* [IOTDB-2820] Update UserGuide SQL about Trigger +* [IOTDB-2837] Add check and sort for NumpyTablet to make sure timestamps are ordered +* [IOTDB-2838] Check and auto correct endian type for NumpyTablet +* [IOTDB-2873] provide json template for grafana +* [IOTDB-2888] Unary expression can followed by a constant +* [IOTDB-3747] Default Paging of Schema Query with limit 10000 +* [IOTDB-3797] Print detailed info in session when connection fails +* [IOTDB-3851] C++ client method of tablet sorting optimization +* [IOTDB-3879] Modify document about the Programming-Cpp-Native-API +* [IOTDB-3901] C++ client method of insertRecordsOfOneDevice sorting optimization + +## Bug Fixes + +* [IOTDB-2753] Insert a time series with a null value and report 500 +* [IOTDB-2759] Result of "Show paths set schema template" or "using template" is not complete +* [IOTDB-2775] Fix throwing exception when query non-exist device in TsFileSequenceReader +* [IOTDB-2787] Fix aligned mem chunk concurrent problem +* [IOTDB-2826] Fix can not drop schema template +* [IOTDB-2828] Update system_version in system.properties after upgrading +* [IOTDB-2835] Fix empty page in selfcheck method of TsFileSequenceReader +* [IOTDB-2837] Add check and sort for NumpyTablet to make sure timestamps are ordered +* [IOTDB-2852] The import-csv tool can not import the data to nonaligned device +* [IOTDB-2859] Fix python tablet with None value is incorrect +* [IOTDB-2862] Fix SQL injection risks of grafana-connector +* [IOTDB-2864] Fix Read-only occurred when insert Text value to aligned timeseries +* [IOTDB-2882] Fix unary expression display bug +* [IOTDB-2902] Handling user privileges for aligned timeseries related features +* [IOTDB-2903] Fix show latest timeseries result does not sorted by time +* [IOTDB-2910] Fix count result not right after deleting storage group +* [IOTDB-2915] MLogTxtWriter error while parsing CreateAlignedTimeseriesPlan +* [IOTDB-2922] Fix NPE when compacting with files that contains zero device +* [IOTDB-2924] UDF Framework: index overflow while iterating sliding windows +* [IOTDB-2983] Serialization error in Partial insert +* [IOTDB-2999] Remove useless config and fix default value error. +* [IOTDB-3018] Fix compaction bugs on handling deleted target file +* [IOTDB-3029] The prefix path generated by the select into target sequence contains * and ** currently unchecked +* [IOTDB-3045] The query result contains some timeseries that have been deleted +* [IOTDB-3120] Print the tsfile name when meet IOException +* [IOTDB-3158] Fix NPE exception when use iotdb-reporter +* [IOTDB-3160] TsFile will be corrupted when flushing memtable appears OOM +* [IOTDB-3168] Forbid the path with * could be inserted +* [IOTDB-3171] Fix NPE when getting modification file +* [IOTDB-3219] Fix stop-server on windows +* [IOTDB-3247] Recover aligned sensors after deleting timeseries, query lost data +* [IOTDB-3301] Tag recover bug after IoTDB server restart +* [IOTDB-3364] Fix Query stucked with null valued aligned timeseries bug +* [IOTDB-3420] Fix show paths set schema template t1 error +* [IOTDB-3494] Fix TypeError in py-session +* [IOTDB-3523] Fix the count and COUNT not equal bug when querying with group by level +* [IOTDB-3645] Fix use statistics bug in aggregation query +* [IOTDB-3651] Stop compaction schedule when all compaction is disable +* [IOTDB-3709] Fix a loop occurred in TsFileResourceList, causing the query to fail and oom occurs +* [IOTDB-3730] Fix ArrayIndexOutOfBounds when flushing a memtable +* [IOTDB-3795] Remove setting read-only when handling compaction exception +* [IOTDB-3803] failed to insert data of TEXT by session +* [IOTDB-3816] Fix /zero bug in recover +* [IOTDB-3822] Fix cross compaction overlap bug +* [IOTDB-3826] Fix duplicate success when concurrent creating same timeseries +* [IOTDB-3858] IndexOutOfBoundsException: bitIndex < 0 +* [ISSUE-5482] Fix Release zip files include incorrect version of Guava +* [ISSUE-5773] Aggregation result is not complete +* [ISSUE-5964] Fix bug of aligned timeseries time duplicated aggregation + + +# Apache IoTDB 0.13.0 + +## New Features + +* [IOTDB-924] Support insert multi rows in SQL +* [IOTDB-959] Add Create Storage Group Grammar +* [IOTDB-1037] set rpc\_compression as a parameter in JDBC URL +* [IOTDB-1059] Support sql statement insert without timestamp +* [IOTDB-1143] Support Continuous query +* [IOTDB-1199] Support aligned timeseries and schema template +* [IOTDB-1319] Support Trigger +* [IOTDB-1391] Add a new Aggregation function extreme (max absolute value) +* [IOTDB-1399] Add a session interface to connect multiple nodes +* [IOTDB-1400] Support arithmetic operations in SELECT clauses +* [IOTDB-1403] Dictionary encoding for TEXT +* [IOTDB-1490] Add built-in UDTFs: sinh, conh, tanh +* [IOTDB-1514] Support null in insertTablet +* [IOTDB-1524] Support SELECT ... INTO ... clause +* [IOTDB-1647] Nested Expressions in SELECT clauses +* [IOTDB-1673] CLI upgrade to JLine3 +* [IOTDB-1739] Constant timeseries generating functions (const, pi and e) +* [IOTDB-1760] Support avg, count, extreme, first\_value, last\_value, max\_time, max\_value, min\_time, min\_value, sum aggregations in group by fill +* [IOTDB-1761] Add metric framework for IoTDB +* [IOTDB-1775] Add CAST function to convert data type +* [IOTDB-1823] Support group by multi level +* [IOTDB-1844] Query support timeseries prefix and suffix matching: root.\*sg\* +* [IOTDB-1859] Support REST API +* [IOTDB-1860] New Grafana plugin +* [IOTDB-1886] Support Constant Expressions in Select Clauses +* [IOTDB-1973] Supports aggregate queries, constants, and arithmetic nested expressions in SELECT clauses +* [IOTDB-1986] Support select UDF as alisa clauses +* [IOTDB-1989] Spark-IoTDB-connector support inserting data +* [IOTDB-2131] Support previous, linear, constant value fill funtion New fill +* [IOTDB-2593] Support using IoTDB with JDK17 +* [ISSUE-3811] Provide a data type column for the last query dataset +* add rabbitmq example + +## Improvements + +* [IOTDB-1280] Rewrite the Antlr grammar file +* [IOTDB-1372] Enhance management of TsFileResource +* [IOTDB-1428] Ask query threads to quit if query is timeout +* [IOTDB-1450] Deletion should only delete related time partitions +* [IOTDB-1463] Implement builder pattern for Session and SessionPool +* [IOTDB-1477] Optimize code logic of generateAlignByDevicePlan() +* [IOTDB-1559] Refactor the IT framework +* [IOTDB-1564] Make hearbeat and election timeout parameters be configurable +* [IOTDB-1581] Consider deletions when recovering tsFileResource of incomplete tsfile +* [IOTDB-1607] Optimize Tracing +* [IOTDB-1613] Recover mods file if write modification failed +* [IOTDB-1639] Refactoring the cluster class structure to make it consistent with the server module +* [IOTDB-1730] client-cpp, enhance session::insertTablet() etc.'s performance +* [IOTDB-1852] Accelerate queryies by using statistics +* [IOTDB-1857] Remove useless handle logic for CountPlan in executeNonQuery in cluster module +* [IOTDB-1884] Distinguish between zero and null values in sum aggregation +* [IOTDB-1924] Remove the operation of clearing the cache after the compaction is over +* [IOTDB-1950] Add Bloom Filter cache for query +* [IOTDB-2001] Remove redundant StorageGroupNotReadyException +* [IOTDB-2011] Update last cache while doing show latest timeseries query +* [IOTDB-2022] SessionDataSet implements AutoCloseable +* [IOTDB-2075] Accelerate the process of insertTablets by using thread pool +* [IOTDB-2119] IoTDB CSV export tools add timestamp accuracy setting function +* [IOTDB-2162] Simplify the recovery merge process +* [IOTDB-2176] Limit target chunk size when performing inner space compaction +* [IOTDB-2193] Reduce unnecessary lock operations of RaftLogManager to improve writing performance +* [IOTDB-2195] Control the concurrent query execution thread +* [IOTDB-2632] Set compaction_write_throughput_mb_per_sec to 16 by default +* [ISSUE-3445] New compaction strategy and compaction scheduling strategy +* [ISSUE-3856] refine exception handling logic in commitTo in RaftLogManager +* [Cluster] No need to shake hands with itself when one node restart + + +## Incompatible changes + +* [IOTDB-1026] Support wildcard \*\* in Path And Replace PrefixPath usage with PathPattern in IOTDB-SQL +* [IOTDB-1620] Support backtick (\`) character and double quotes (") to quote identifiers +* [IOTDB-1650] Rename the sql command `move` to `unload` + +## Miscellaneous changes + +* [IOTDB-1342] modify error message about LIMIT and OFFSET used in conjunction with the FILL clause +* [IOTDB-1372] delete devices field in FileTimeIndex +* [IOTDB-1531] Check tsfile creation time when recovering +* [IOTDB-1541] Change sequence of wal and memtable in insertion +* [IOTDB-1923] Separate the request unpacking and execution processing logic of TSServiceImpl +* [IOTDB-1969] Remove statistic resources of old metric framework from iotdb-server +* [IOTDB-2014] MicrometerPrometheusReporter#getReporterType return null +* [IOTDB-2043] refactor: remove haveSorted param from Session +* [IOTDB-2154] add TsFileUtils.isTsFileComplete +* [IOTDB-2206] Rename StorageGroupProcessor to VirtualStorageGroupProcessor +* [IOTDB-2208] Reconstruct the process of generating resultset header of query +* [ISSUE-4047] Generic type in Statistics extend Serializable +* Add compaction version in cache key +* Add a constructor of IoTDBDescriptorHolder to prohibit instantiation + +## Bug Fixes + +* [IOTDB-1266] Fix SHOW TIMESERIES will only display 2000 timeseries +* [IOTDB-1478] The whole IoTDB can not read/write if any one sg is not ready +* [IOTDB-1562] Fix incorrect exception processing in insertXXX() API +* [IOTDB-1583] Raft log failed to be committed in cluster version +* [IOTDB-1592] BugFix: SLimit Not effective in align by device +* [IOTDB-1736] Fix error code is not printed in TSServiceImpl's log +* [IOTDB-1749] sync-tool's lockInstance() dose not take effect +* [IOTDB-1758] sync-tool, empty uuid file cause tool can not auto-recovery +* [IOTDB-1848] Failed to initialize pool: Does not support setReadOnly in grafana-connector +* [IOTDB-1853] Fix bug about more than one TimeseriesMetadata in TsFile +* [IOTDB-2010] fix incomplete show timeseries result +* [IOTDB-2021] Fix Bloom Filter Cache doesn't take effect bug +* [IOTDB-2060] Fix NPE when using fill without a filter +* [IOTDB-2074] Fix NullPointerException when recovering compaction in MacOS +* [IOTDB-2077] Unexpected exception when executing raw data query without VF with limit clause +* [IOTDB-2088] Fix IndexOutOfBound exception in AggregationPlan.groupAggResultByLevel +* [IOTDB-2116] Fix all client connections are stuck bug caused by logback bug +* [IOTDB-2129] Wrong result returned when querying by nested expressions with aliases +* [IOTDB-2143] fix wrong precision in cluster mode +* [IOTDB-2153] [IOTDB-2157] fix incorrect path search space +* [IOTDB-2159] Fix wrong status code when inserting data to a read-only cluster +* [IOTDB-2163] Fix unexpected amount of columns in a cluster slimit query +* [IOTDB-2174] Fix Regexp filter serializing and deserializing error +* [IOTDB-2180] Fix show latest timeseries in cluster +* [IOTDB-2183] Fix the config problems in cluster mode +* [IOTDB-2185] Fix get an exception when parsing the header of CSV +* [IOTDB-2209] Fix logback CVE-2021-42550 issue +* [IOTDB-2251] [IOTDB-2252] Fix Query deadlock +* [IOTDB-2267] UDF: Error code 500 caused by user logic +* [IOTDB-2282] fix tag recovery bug after tag upsert +* [IOTDB-2290] Fix Incorrect query result in C++ client +* [IOTDB-2520] Fix `list user privilege root` returns empty +* [IOTDB-2544] Fix tag info sync error during metadata sync +* [IOTDB-2550] Avoid show timeseries error after alter tag on sync sender +* [IOTDB-2654] Fix Alias doesn't show when using group by level +* Fix CPP client could not be successfully built on windows +* Fix dead lock in setDataTTL method + +# Apache IoTDB 0.12.5 + +## 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 + +# Apache IoTDB 0.12.4 + +## New Features + +* [IOTDB-1823] group by multi level + +## Improvements + +* [IOTDB-2027] Rollback invalid entry after WAL writing failure +* [IOTDB-2061] Add max concurrent sub query parameter, read data in batches to limit max IO and add max cached buffer size configuration +* [IOTDB-2065] release TsFileSequenceReader soon when it is no longer used +* [IOTDB-2072] Remove TVListAllocator to reduce the TVList mem cost +* [IOTDB-2101] Reduce the memory footprint of QueryDataSource +* [IOTDB-2102] Push limit operator down to each reader +* [IOTDB-2123] Accelerate recovery process +* update user guide for cpp-cpi and disable compiling nodejs in cpp-cli +* Ignore too many WAL BufferOverflow log + + +## Bug Fixes +* [IOTDB-1408] Statement with 'as' executes incorrectly in mutil-path scenes +* [IOTDB-2023] Fix serializing and deserializing bugs of Filters +* [IOTDB-2025] Fix count nodes and devices incorrectly in cluster +* [IOTDB-2031] Fix incorrect result of descending query with value filter in cluster +* [IOTDB-2032] Fix incorrect result of descending query with multiple time partitions +* [IOTDB-2039] Fix data redundant after too many open files exception occurs during compaction +* [IOTDB-2047] Fix NPE when memControl is disabled and insert TEXT value to a non-TEXT series +* [IOTDB-2058] Fix Query is blocked without sub-query-threads exist bug +* [IOTDB-2063] Fix MinTimeDescAggregationResult implementation bug +* [IOTDB-2064] Fix the NPE caused by map serde +* [IOTDB-2068] Fix GZIP compressor meets ArrayIndexOutOfBoundsException +* [IOTDB-2124] the filtering condition does not take efffect for last query in cluster +* [IOTDB-2138] Fix data loss after IoTDB recover +* [IOTDB-2140] Fix merge throw NullPointerException +* [IOTDB-2152] PyClient: Override `__eq__()` of TSDataType, TSEncoding and Compressor to avoid unexpected comparation behaviour +* [IOTDB-2160] Fix cluster groupby query cross-node reference leaks +* [ISSUE-3335] Fix the bug of start-cli.sh -e mode can't work with wild card \* +* fix memory leak: replace RandomDeleteCache with Caffine CacheLoader +* Fix connection refused using session when users forget to set client ip + + +# Apache IoTDB 0.12.3 + +## Improvements + +* [IOTDB-842] Better Export/Import-CSV Tool +* [IOTDB-1738] Cache paths list in batched insert plan +* [IOTDB-1792] remove tomcat-embed dependency and make all transitive dependencies versions consistent +* [ISSUE-4072] Parallel insert records in Session +* Print the file path while meeting error in case of reading chunk + +## Bug Fixes + +* [IOTDB-1275] Fix backgroup exec for cli -e function causes an infinite loop +* [IOTDB-1287] Fix C++ class Session has 2 useless sort() +* [IOTDB-1289] fix CPP mem-leak in SessionExample.cpp insertRecords() +* [IOTDB-1484] fix auto create schema in cluster +* [IOTDB-1578] Set unsequnce when loading TsFile with the same establish time +* [IOTDB-1619] Fix an error msg when restart iotdb-cluster +* [IOTDB-1629] fix the NPE when using value fill in cluster mode +* [IOTDB-1632] Fix Value fill function fills even when the data exists +* [IOTDB-1651] add reconnect to solve out of sequence in sync module +* [IOTDB-1659] Fix Windows CLI cannot set maxPRC less than or equal to 0 +* [IOTDB-1670] Fix cli -e mode didn't fetch timestamp_precision from server +* [IOTDB-1674] Fix command interpret error causing somaxconn warning failed +* [IOTDB-1677] Fix not generate file apache-iotdb-0.x.x-client-cpp-linux-x86_64-bin.zip.sha512 +* [IOTDB-1678] Fix client-cpp session bug: can cause connection leak. +* [IOTDB-1679] client-cpp: Session descontruction need release server resource +* [IOTDB-1690] Fix align by device type cast error +* [IOTDB-1693] fix IoTDB restart does not truncate broken ChunkGroup bug +* [IOTDB-1703] Fix MManager slow recover with tag +* [IOTDB-1714] fix Could not find or load main class when start with jmx on win +* [IOTDB-1723] Fix concurrency issue in compaction selection +* [IOTDB-1726] Wrong hashCode() and equals() method in ChunkMetadata +* [IOTDB-1727] Fix Slow creation of timeseries with tag +* [IOTDB-1731] Fix sync error between different os +* [IOTDB-1733] Fix dropping built-in function +* [IOTDB-1741] Avoid double close in level compaction execution +* [IOTDB-1785] Fix Illegal String ending with . being parsed to PartialPath +* [IOTDB-1836] Fix Query Exception Bug after deleting all sgs +* [IOTDB-1837] Fix tagIndex rebuild failure after upgrade mlog from mlog.txt to mlog.bin +* [IOTDB-1838] The compacting status in SGP is always false +* [IOTDB-1846] Fix the error when count the total number of devices in cluster mode +* [IoTDB-1847] Not throw excpetion when pulling non--existent time series +* [IOTDB-1850] Fix deserialize page merge rate limiter +* [IoTDB-1865] Compaction is blocking when removing old files in Cluster +* [IOTDB-1868] Use RwLock to reduce the lock time for nodeRing +* [IOTDB-1872] Fix data increases abnormally after IoTDB restarts +* [IOTDB-1877] Fix Sync recovery and reconnection bugs in both sender and receiver +* [IOTDB-1879] Fix some Unsequence files never be merged to higher level or Sequence folder +* [IOTDB-1887] Fix importing csv data containing null throws exception +* [IOTDB-1893] Fix Can not release file lock in sync verify singleton +* [IOTDB-1895] Cache leader optimization for batch write interfaces on multiple devices +* [IOTDB-1903] Fix IndexOutOfRangeException when starting IoTDB +* [IoTDB-1913] Fix When exporting a amount of data from csv, it will report network error or OOM +* [IOTDB-1925] Fix the modification of max_select_unseq_file_num_in_each_compaction parameter does not take effect +* [IOTDB-1958] Add storage group not ready exception +* [IOTDB-1961] Cluster query memory leak +* [IOTDB-1975] OOM caused by that MaxQueryDeduplicatedPathNum doesn't take effect +* [IOTDB-1983] Fix DescReadWriteBatchData serializing bug +* [IOTDB-1990] Fix unchecked null result by calling IReaderByTimestamp.getValuesInTimestamps() +* [ISSUE-3945] Fix Fuzzy query not support multiDevices and alignByDevice Dataset +* [ISSUE-4288] Fix CI issue caused by the invalid pentaho download url +* [ISSUE-4293] SessionPool: InterruptedException is not properly handled in synchronized wait() +* [ISSUE-4308] READ_TIMESERIES privilege granted to users and roles can not take effect when quering by UDFs +* fix merge ClassCastException: MeasurementMNode +* change sync version check to major version +* init dummyIndex after restart cluster + +# Apache IoTDB 0.12.2 + +## New Features + +* [IOTDB-959] Add create storage group Grammar +* [IOTDB-1399] Add a session interface to connect multiple nodes +* [IOTDB-1466] Support device template +* [IOTDB-1491] UDTF query supported in cluster +* [IOTDB-1496] Timed flush memtable +* [IOTDB-1536] Support fuzzy query REGEXP +* [IOTDB-1561] Support fill by specific value +* [IOTDB-1565] Add sql: set system to readonly/writable +* [IOTDB-1569] Timed close TsFileProcessor +* [IOTDB-1586] Support mysql-style Like clause +* [ISSUE-3811] Provide a data type column for the last query dataset +* TTL can be set to the prefix path of storage group +* add JMX monitor to all ThreadPools in the server module + +## Improvements + +* [IOTDB-1566] Do not restrict concurrent write partitions +* [IOTDB-1585] ModificationFileâs write interface blocking +* [IOTDB-1587] SessionPool optimization: a more aggressive Session creation strategy +* Use StringCachedPool in TsFileResource to reduce the memory size +* write performance optimization when replicaNum == 1 +* Optimize Primitive Array Manager +* Function Improvement: add overlapped page rate in Tracing + +## Bug Fixes + +* [IOTDB-1282] fix C++ class SessionDataSet mem-leak +* [IOTDB-1407] fix Filtering time series based on tags query fails Occasionally +* [IOTDB-1437] Fix the TsFileSketchTool NPE +* [IOTDB-1442] Time filter & TTL do not take effect in cluster +* [IOTDB-1452] remove compaction log/ change logger to daily +* [IOTDB-1447] ClientPool is blocking other nodes when one node fails +* [IOTDB-1456] Fix Error occurred while executing delete timeseries statement +* [IOTDB-1461] Fix compaction conflicts with ttl +* [IOTDB-1462] Fix cross space compaction recover null pointer bug +* [IOTDB-1464] fix take byte array null pointer +* [IOTDB-1469] fix cross space compaction lost data bug +* [IOTDB-1471] Fix path not right in "sg may not ready" log +* [IOTDB-1475] MeasurementId check while create timeseries or template/ disable time or timestamp in timeseries path +* [IOTDB-1488] Fix metaMember's forwarding clientPool timeout in cluster module +* [IOTDB-1494] fix compaction block flush bug +* [IoTDB-1499] Remove series registration using IoTDBSink +* [IoTDB-1501] Fix compaction recover delete tsfile bug +* [IOTDB-1529] Fix mlog recover idx bug and synchronize setStorageGroup +* [IOTDB-1537] fix insertTablet permission +* [IOTDB-1539] Fix delete operation with value filter is abnormal +* [IOTDB-1540] Bug Fix: 500 when using IN operator +* [IOTDB-1541] Fix query result not right due to non-precise time index of resource +* [IOTDB-1542] Cpp client segment fault: char[] buffer overflow caused by long exception message +* [IOTDB-1545] Query dataset memory leak on server caused by cpp client +* [IOTDB-1546] Optimize the Upgrade Tool rewrite logic to reduce the temp memory cost +* [IOTDB-1552] Only allow equivalent filter for TEXT data type +* [IOTDB-1556] Abort auto create device when meet exception in setStorageGroup +* [IOTDB-1574] Deleted file handler leak +* [IOTDB-1580] Error result of order by time desc when enable time partition +* [IOTDB-1584] Doesn't support order by time desc in cluster mode +* [IOTDB-1588] Bug fix: MAX_TIME is incorrect in cluster mode +* [IOTDB-1594] Fix show timeseries returns incorrect tag value +* [IOTDB-1600] Fix InsertRowsOfOneDevicePlan being not supported in cluster mode +* [IOTDB-1610] Fix TsFileRewriteTool writing incorrect data file +* [ISSUE-3116] Bug when using natural month unit in time interval in group by query +* [ISSUE-3316] Query result with the same time range is inconsistent in group by query +* [ISSUE-3436] Fix query result not right after deleting multiple time interval of one timeseries +* [ISSUE-3458] fix load configuration does not take effect +* [ISSUE-3545] Fix Time interval value is disorder in group by month +* [ISSUE-3653] fix Max_time and last return inconsistent result +* [ISSUE-3690] Memory leaks on the server when cpp client invokes checkTimeseriesExists +* [ISSUE-3805] OOM caused by Chunk cache +* [ISSUE-3865] Meaningless connection reset issues caused by low default value for SOMAXCONN +* Fix DataMigrationExample OOM if migrate too many timeseries +* Handle false positive cases which may cause NPE of tsfile bloom filter +* Fix Windows shell error on JDK11 & fix iotdb-env.bat not working +* Fix cluster auto create schema bug when retry locally +* Fix thrift out of sequence in cluster module +* Skip non exist measurement in where clause in align by device +* fix blocking query when selecting TsFile in compaction +* Fix redundant data in compaction recover +* Fix load tsfile with time partition enable + +## Incompatible changes + +* [IOTDB-1485] Replace tsfile_size_threshold by unseq_tsfile_size/seq_tsfile_size + +## Miscellaneous changes + +* [IOTDB-1499] Remove unused exception throwing notation in IoTDBSink +* [IOTDB-1500] Remove current dynamic query memory control +* [ISSUE-3674] Disable thrift code generation for Javascript +* enable cacheLeader by default +* add audit log when execute delete and set sg for tracing +* modify nodeTool user to root + +# Apache IoTDB 0.12.1 + +## Bug Fixes + +* [GITHUB-3373] Remove the broken cached leader connection & optimize the insertRecords method in session +* [IOTDB-1433] Fix bug in getMetadataAndEndOffset when querying non-exist device +* [IOTDB-1432] fix level compaction loss data +* [IOTDB-1427] Fix compaction lock with query +* [IOTDB-1420] Fix compaction ttl bug +* [IOTDB-1419] Remove redundant clearCompactionStatus, fix continuous compaction doesn't take effect when + enablePartition +* [IOTDB-1415] Fix OOM caused by ChunkCache +* [IOTDB-1414] NPE occurred when call getStorageGroupNodeByPath() method using not exist path +* [IOTDB-1412] Unclear exception message thrown when executing empty InsertTabletPlan +* [IOTDB-1411] Fix thriftMaxFrameSize and thriftDefaultBufferSize does not in effect +* [IOTDB-1398] Do not select unseq files when there are uncompacted old unseq files +* [IOTDB-1390] Fix unseq compaction loss data bug +* [IOTDB-1384] Fix group by bug +* [ISSUE-3378] Fix NPE when clear upgrade folder; Fix some upgraded pageHeader missing statistics +* [GITHUB-3339] Try to fix sg dead lock +* [GITHUB-3329] Fix upgrade NPE and DeadLock +* [GITHUB-3319] Fix upgrade tool cannot close file reader +* [IOTDB-1212] Fix The given error message is not right when executing select sin(non_existence) from root.sg1.d1 +* [IOTDB-1219] Fix a potential NPE issue in UDF module +* [IOTDB-1286] Fix 4 C++ mem-leak points +* [IOTDB-1294] Fix delete operation become invalid after compaction +* [IOTDB-1313] Fix lossing time precision when import csv with unsupported timestamp format +* [IOTDB-1316] The importCsv tool should continue inserting if a part of insertion failed +* [IOTDB-1317] Fix log CatchUp always failed due to not check the follower's match index +* [IOTDB-1323] Fix return a success message when encounter RuntimeException during the insertion process +* [IOTDB-1325] Fix StackOverflow Exception in group by natural month query +* [IOTDB-1330] Fix the load tsfile bug when the cross multi partition's tsfile only have one page +* [IOTDB-1348] Fix Last plan not work in cluster mode +* [IOTDB-1376] Fix BatchProcessException was not correctly handled in BaseApplier +* [ISSUE-3277] Fix TotalSeriesNumber in MManager counted twice when recovering +* [ISSUE-3116] Fix bug when using natural month unit in time interval in group by query +* [ISSUE-3309] Fix InsertRecordsOfOneDevice runs too slow +* Fix the plan index is always zero when using insertRecords interface to run the cluster +* Add authority check for users create timeseries using executeBatch interface without the privilege +* Fix versionInfo NPE when query upgrading 0.11 tsfile +* Fix upgrade tool cannot load old tsfile if time partition enabled in 0.11 +* Fix import csv throw ArrayOutOfIndexError when the last value in a line is null +* Fix upgrade tool cannot close file reader + +## Improvements + +* [GITHUB-3399] Change the default primitive array size to 32 +* [IOTDB-1387] Support Without Null ALL in align by device clause, Filter RowRecord automatically if any column in it is + null or all columns are null +* [IOTDB-1385] Extract the super user to the configuration +* [IOTDB-1315] ExportCsvTool should support timestamp `yyyy-MM-dd'T'HH:mm:ss.SSSZ` +* [IOTDB-1339] optimize TimeoutChangeableTSnappyFramedTransport +* [IOTDB-1356] Separate unseq_file_num_in_each_level from selecting candidate file in unseq compaction +* [IOTDB-1357] Compaction use append chunk merge strategy when chunk is already large enough +* [IOTDB-1380] Automatically close the dataset while there is no more data +* Optimize sync leader for meta + +## New Features + +* [GITHUB-3389] TTL can be set to any path +* [GITHUB-3387] Add parameter compaction_interval=10000ms +* [IOTDB-1190] Fully support HTTP URL char set in timeseries path +* [IOTDB-1321][IOTDB-1322] Filter RowRecord automatically if any column in it is null or all columns are null +* [IOTDB-1357] Compaction use append chunk merge strategy when chunk is already large +* [ISSUE-3089] Make it possible for storage groups to have name with hyphen + +## Miscellaneous changes + +* [GITHUB-3346] upgrade netty and claim exclusion for enforcer check +* [IOTDB-1259] upgrade libthrift from 0.12.0/0.13.0 to 0.14.1 +* Uncomment the less used configurations +* Enable the configration `concurrent_writing_time_partition` + + +# Apache IoTDB 0.12.0 + +## New Features +* [IOTDB-68] New shared-nothing cluster +* [IOTDB-507] Add zeppelin-interpreter module +* [IOTDB-825] Aggregation by natural month +* [IOTDB-890] support SDT lossy compression +* [IOTDB-944] Support UDTF (User-defined Timeseries Generating Function) +* [IOTDB-965] Add timeout parameter for query +* [IOTDB-1077] Add insertOneDeviceRecords API in java session +* [IOTDB-1055] Support data compression type GZIP +* [IOTDB-1024] Support multiple aggregated measurements for group by level statement +* [IOTDB-1276] Add explain sql support and remove debug_state parameter +* [IOTDB-1197] Add iotdb-client-go as a git submodule of IoTDB repo +* [IOTDB-1230] Support spans multi time partitions when loading one TsFile +* [IOTDB-1273] Feature/restrucutre python module as well as supporting pandas dataframe +* [IOTDB-1277] support IoTDB as Flink's data source +* [PR-2605] Add level merge to "merge" command + +## Incompatible changes +* [IOTDB-1081] New TsFile Format +* [ISSUE-2730] Add the number of unseq merge times in TsFile name. + + +## Miscellaneous changes +* [IOTDB-868] Change mlog from txt to bin +* [IOTDB-1069] Restrict the flushing memtable number to avoid OOM when mem_control is disabled +* [IOTDB-1104] Refactor the error handling process of query exceptions +* [IOTDB-1108] Add error log to print file name while error happened +* [IOTDB-1152] Optimize regular data size in traversing +* [IOTDB-1180] Reset the system log file names and maximal disk-space size +* [ISSUE-2515] Set fetchsize through JDBC and Session +* [ISSUE-2598] Throw explicit exception when time series is unknown in where clause +* [PR-2944] Throw exception when device to be queried is not in TsFileMetaData +* [PR-2967] Log memory usage information in SystemInfo for better diagnosis + +## Bug Fixes +* [IOTDB-1049] Fix NullpointerException and a delete bug in Last query +* [IOTDB-1050] Fix Count timeserise column name is wrong +* [IOTDB-1068] Fix Time series metadata cache bug +* [IOTDB-1084] Fix temporary memory of flushing may cause OOM +* [IOTDB-1106] Fix delete timeseries bug +* [IOTDB-1126] Fix the unseq tsfile delete due to merge +* [IOTDB-1135] Fix the count timeseries prefix path bug +* [IOTDB-1137] Fix MNode.getLeafCount error when existing sub-device +* [ISSUE-2484] Fix creating timeseries error by using "create" or "insert" statement +* [ISSUE-2545, 2549] Fix unseq merge end time bug +* [ISSUE-2611] An unsequence file that covers too many sequence file causes OOM query +* [ISSUE-2688] LRULinkedHashMap does not work as an LRU Cache +* [ISSUE-2709, 1178] Fix cache not cleared after unseq compaction bug, Fix windows 70,10 ci bug in unseq compaction ci +* [ISSUE-2741] getObject method in JDBC should return an Object +* [ISSUE-2746] Fix data overlapped bug after unseq compaction +* [ISSUE-2758] NullPointerException in QueryTimeManager.checkQueryAlive() +* [ISSUE-2905] Fix Files.deleteIfExists() doesn't work for HDFS file +* [ISSUE-2919] Fix C++ client memory leak bug +* [PR-2613] Fix importCSVTool import directory bug & encode bug +* [PR-2409] Fix import csv which can't import time format str +* [PR-2582] Fix sync bug for tsfiles's directory changed by vitural storage group +* [ISSUE-2911] Fix The write stream is not closed when executing the command 'tracing off' + +# Apache IoTDB 0.11.4 + +## Bug Fixes + +* IOTDB-1303 Disable group by without aggregation function in select clause +* IOTDB-1306 Fix insertion blocked caused the deadlock in memory control module +* IOTDB-1308 Fix users with READ_TIMESERIES permission cannot execute group by fill queries +* IOTDB-1344 Fix cannot create timeseries caused by the timeseries count doesn't reset when deleting storage group +* IOTDB-1384 Some value will disappear while using group by query +* IOTDB-1398 Do not select unseq files when there are uncompacted old unseq files +* ISSUE-3316 Fix query result with the same time range is inconsistent in group by query +* Fix TotalSeriesNumber in MManager counted twice when recovering +* Fix unseq compaction throws a wrong exception if some paths are not in the file +* Fix overlapped data should be consumed first exception when query + +## Improvements + +* IOTDB-1356 Separate unseq_file_num_in_each_level from selecting candidate file in unseq compaction +* IOTDB-1412 Unclear exception message thrown when executing empty InsertTabletPlan +* continuous compaction in level compaction strategy when no tsfile is to be closed + +## New Features + +* support brackets with number in timeseries path + +# Apache IoTDB 0.11.3 + +## Bug Fixes +* ISSUE-2505 ignore PathNotExistException in recover and change recover error to warn +* IOTDB-1119 Fix C++ SessionDataSet bug when reading value buffer +* Fix SessionPool does not recycle session and can not offer new Session due to RunTimeException +* ISSUE-2588 Fix dead lock between deleting data and querying in parallel +* ISSUE-2546 Fix first chunkmetadata should be consumed first +* IOTDB-1126 Fix unseq tsfile is deleted due to compaction +* IOTDB-1137 MNode.getLeafCount error when existing sub-device +* ISSUE-2624 ISSUE-2625 Avoid OOM if user don't close Statement and Session manually +* ISSUE-2639 Fix possible NPE during end query process +* Alter IT for An error is reported and the system is suspended occasionally +* IOTDB-1149 print error for -e param when set maxPRC<=0 +* IOTDB-1247 Fix the insert blocked caused the bugs in mem control module +* ISSUE-2648 Last query not right when having multiple devices +* Delete mods files after compaction +* ISSUE-2687 fix insert NaN bug +* ISSUE-2598 Throw explicit exception when time series is unknown in where clause +* Fix timeseriesMetadata cache is not cleared after the TsFile is deleted by a compaction +* ISSUE-2611 An unsequence file that covers too many sequence file causes OOM query +* IOTDB-1135 Fix count timeseries bug when the paths are nested +* ISSUE-2709 IOTDB-1178 Fix cache is not cleared after compaction +* ISSUE-2746 Fix data overlapped bug after the elimination unseq compaction process +* Fix getObject method in JDBC should return an Object +* IOTDB-1188 Fix IoTDB 0.11 unable to delete data bug +* Fix when covering a tsfile resource with HistoricalVersion = null, itâll throw a NPE +* fix the elimination unseq compaction may loss data bug after a delete operation is executed +* Fix a bug of checking time partition in DeviceTimeIndex +* Throw exeception when device to be queried is not in tsFileMetaData +* Fix unseq compaction file selector conflicts with time partition bug +* Fix high CPU usage during the compaction process + +## Improvements +* IOTDB-1140 optimize regular data encoding +* Add more log for better tracing +* Add backgroup exec for cli -e function +* Add max direct memory size parameter to env.sh +* Change last cache log to debug level + +## New Features +* Add explain sql support + + +# Apache IoTDB 0.11.2 + +## Bug Fixes +* IOTDB-1049 Fix Nullpointer exception and a delete bug in Last query +* IOTDB-1060 Support full deletion for delete statement without where clause +* IOTDB-1068 Fix Time series metadata cache bug +* IOTDB-1069 restrict the flushing memtable number to avoid OOM when mem_control is disabled +* IOTDB-1077 add insertOneDeviceRecords API in java session +* IOTDB-1087 fix compaction block flush: flush do not return until compaction finished +* IOTDB-1106 Delete timeseries statement will incorrectly delete other timeseries +* Github issue-2137 fix grafana value-time position bug +* Github issue-2169 GetObject returns String for all data types +* Github issue-2240 fix Sync failed: Socket is closed by peer +* Github issue-2387 The deleteData method exists in Session but not in SessionPool. +* add thrift_max_frame_size in iotdb-engine.properties +* Fix incorrect last result after deleting all data +* Fix compaction recover block restart: IoTDB cannot restart until last compaction recover task finished +* Fix compaction ignore modification file: delete does not work after compaction +* print more insert error message in client +* expose enablePartition parameter into iotdb-engines.properpties + +# Apache IoTDB 0.11.1 + +## Bug Fixes +* IOTDB-990 cli parameter maxPRC shouldn't to be set zero +* IOTDB-993 Fix tlog bug +* IOTDB-994 Fix can not get last_value while doing the aggregation query along with first_value +* IOTDB-1000 Fix read redundant data while select with value filter with unseq data +* IOTDB-1007 Fix session pool concurrency and leakage issue when pool.close is called +* IOTDB-1016 overlapped data should be consumed first +* IOTDB-1021 Fix NullPointerException when showing child paths of non-existent path +* IOTDB-1028 add MAX\_POINT\_NUMBER format check +* IOTDB-1034 Fix Show timeseries error in Chinese on Windows +* IOTDB-1035 Fix bug in getDeviceTimeseriesMetadata when querying non-exist device +* IOTDB-1038 Fix flink set storage group bug +* ISSUE-2179 fix insert partial tablet with binary NullPointer bug +* add reject status code +* Update compaction level list delete +* Fix query result is not correct +* Fix import errors in Session.py and SessionExample.py +* Fix modules can not be found when using pypi to pack client-py +* Fix Count timeseries group by level bug +* Fix desc batchdata count bug + +# Apache IoTDB 0.11.0 + +## New Features + +* IOTDB-627 Support range deletion for timeseries +* IOTDB-670 Add raw data query interface in Session +* IOTDB-716 add lz4 compression +* IOTDB-736 Add query performance tracing +* IOTDB-776 New memory control strategy +* IOTDB-813 Show storage group under given path prefix +* IOTDB-848 Support order by time asc/desc +* IOTDB-863 add a switch to drop ouf-of-order data +* IOTDB-873 Add count devices DDL +* IOTDB-876 Add count storage group DDL +* IOTDB-926 Support reconnection of Session +* IOTDB-941 Support 'delete storage group <prefixPath>' +* IOTDB-968 Support time predicate in select last, e.g., select last * from root where time >= T +* Show alias if it is used in query +* Add level compaction strategy +* Add partialInsert + +## Incompatible changes + +* IOTDB-778 Support double/single quotation in Path +* IOTDB-870 change tags and attributes output to two columns with json values + +## Miscellaneous changes + +* IOTDB-784 Update rpc protocol to V3 +* IOTDB-790 change base_dir to system_dir +* IOTDB-829 Accelerate delete multiple timeseries +* IOTDB-839 Make Tablet api more friendly +* IOTDB-902 Optimize max_time aggregation +* IOTDB-916 Add a config entry to make Last cache configurable +* IOTDB-928 Make ENCODING optional in create time series sentence +* IOTDB-938 Re-implement Gorilla encoding algorithm +* IOTDB-942 Optimization of query with long time unsequence page +* IOTDB-943 Fix cpu usage too high +* Add query load log +* Add merge rate limiting + +## Bug Fixes + +* IOTDB-749 Avoid select * from root OOM +* IOTDB-774 Fix "show timeseries" OOM problem +* IOTDB-832 Fix sessionPool logic when reconnection failed +* IOTDB-833 Fix JMX cannot connect IoTDB in docker +* IOTDB-835 Delete timeseries and change data type then write failed +* IOTDB-836 Statistics classes mismatched when endFile ï¼delete timeseries then recreateï¼ +* IOTDB-837 ArrayIndexOutOfBoundsException if the measurementId size is not consistent with the value size +* IOTDB-847 Fix bug that 'List user privileges' cannot apply to 'root' +* IOTDB-850 a user could list others privilege bug +* IOTDB-851 Enhance failure tolerance when recover WAL (enable partial insertion) +* IOTDB-855 Can not release Session in SessionPool if RuntimeException occurs +* IOTDB-868 Can not redo mlogs with special characters like comma +* IOTDB-872 Enable setting timezone at client +* IOTDB-877 fix prefix bug on show storage group and show devices +* IOTDB-904 fix update last cache NullPointerException +* IOTDB-920 Disable insert row that only contains time/timestamp column +* IOTDB-921 When execute two query simultaneously in one statement, got error +* IOTDB-922 Int and Long can convert to each other in ResultSet +* IOTDB-947 Fix error when counting node with wildcard +* IOTDB-949 Align by device doesn't support 'T*' in path. +* IOTDB-956 Filter will be missed in group by time align by device +* IOTDB-963 Redo deleteStorageGroupPlan failed when recovering +* IOTDB-967 Fix xxx does not have the child node xxx Bug in count timeseries +* IOTDB-970 Restrict log file number and size +* IOTDB-971 More precise error messages of slimit and soffset +* IOTDB-975 when series does not exist in TsFile, reading wrong ChunkMetadataList + +# Apache IoTDB (incubating) 0.10.1 + +* [IOTDB-797] InsertTablet deserialization from WAL error +* [IOTDB-788] Can not upgrade all storage groups +* [IOTDB-792] deadlock when insert while show latest timeseries +* [IOTDB-794] Rename file or delete file Error in start check in Windows +* [IOTDB-795] BufferUnderflowException in Hive-connector +* [IOTDB-766] Do not release unclosed file reader, a small memory leak +* [IOTDB-796] Concurrent Query throughput is low +* Query result is not correct when some unsequence data exists +* Change the default fetch size to 10000 in session +* [IOTDB-798] fix a set rowLimit and rowOffset bug +* [IOTDB-800] Add a new config type for those parameters which could not be modified any more after the first start +* [IOTDB-802] Improve "group by" query performance +* [IOTDB-799] remove log visualizer tool from v0.10 +* fix license-binary +* [IOTDB-805] Fix BufferUnderflowException when querying TsFile stored in HDFS +* python session client ver-0.10.0 +* [IOTDB-808] fix bug in selfCheck() truncate +* fix doc of MeasurementSchema in Tablet +* [IOTDB-811] fix upgrading mlog many times when upgrading system.properties crashed +* Improve IoTDB restart process +* remove jol-core dependency which is introduced by hive-serde 2.8.4 +* remove org.json dependency because of license compatibility +* [ISSUE-1551] fix set historical version when loading additional tsfile + + +# Apache IoTDB (incubating) 0.10.0 + +## New Features + +* IOTDB-217 A new GROUPBY syntax, e.g., select avg(s1) from root.sg.d1.s1 GROUP BY ([1, 50), 5ms) +* IOTDB-220 Add hot-load configuration function +* IOTDB-275 allow using user defined JAVA_HOME and allow blank space in the JAVA_HOME +* IOTDB-287 Allow domain in JDBC URL +* IOTDB-292 Add load external tsfile feature +* IOTDB-297 Support "show flush task info" +* IOTDB-298 Support new Last point query. e.g, select last * from root +* IOTDB-305 Add value filter function while executing align by device +* IOTDB-309 add Dockerfiles for 0.8.1, 0.9.0, and 0.9.1 +* IOTDB-313 Add RandomOnDiskUsableSpaceStrategy +* IOTDB-323 Support insertRecords in session +* IOTDB-337 Add timestamp precision properties for grafana +* IOTDB-343 Add test method in session +* IOTDB-396 Support new query clause: disable align, e.g., select * from root disable align +* IOTDB-447 Support querying non-existing measurement and constant measurement +* IOTDB-448 Add IN operation, e.g., where time in (1,2,3) +* IOTDB-456 Support GroupByFill Query, e.g., select last_value(s1) from root.sg.d1 GROUP BY ([1, 10), 2ms) FILL(int32[previousUntilLast]) +* IOTDB-467 The CLI displays query results in a batch manner +* IOTDB-497 Support Apache Flink Connector with IoTDB +* IOTDB-558 add text support for grafana +* IOTDB-560 Support Apache Flink connecter with TsFile +* IOTDB-565 MQTT Protocol Support, disabled by default, open in iotdb-engine.properties +* IOTDB-574 Specify configuration when start iotdb +* IOTDB-588 Add tags and attributes management +* IOTDB-607 add batch create timeseries in native interface +* IOTDB-612 add limit&offset to show timeseries +* IOTDB-615 Use TsDataType + Binary to replace String in insert plan +* IOTDB-617 Support alter one time series's tag/attribute +* IOTDB-630 Add a jdbc-like way to fetch data in session +* IOTDB-640 Enable system admin sql (flush/merge) in JDBC or Other API +* IOTDB-671 Add clear cache command +* Support open and close time range in group by, e.g, [), (] +* Online upgrade from 0.9.x +* Support special characters in path: -/+&%$#@ +* IOTDB-446 Support path start with a digit, e.g., root.sg.12a +* enable rpc compression in session pool +* Make JDBC OSGi usable and added a feature file +* add printing one resource file tool +* Allow count timeseries group by level=x using default path +* IOTDB-700 Add OpenID Connect based JWT Access as alternative to Username / Password +* IOTDB-701 Set heap size by percentage of system total memory when starts +* IOTDB-708 add config for inferring data type from string value +* IOTDB-715 Support previous time range in previousuntillast +* IOTDB-719 add avg_series_point_number_threshold in config +* IOTDB-731 Continue write inside InsertPlan +* IOTDB-734 Add Support for NaN in Double / Floats in SQL Syntax. +* IOTDB-744 Support upsert alias + + +## Incompatible changes + +* IOTDB-138 Move All metadata query to usual query +* IOTDB-322 upgrade to thrift 0.12.0-0.13.0 +* IOTDB-325 Refactor Statistics in TsFile +* IOTDB-419 Refactor the 'last' and 'first' aggregators to 'last_value' and 'first_value' +* IOTDB-506 upgrade the rpc protocol to v2 to reject clients or servers that version < 0.10 +* IOTDB-587 TsFile is upgraded to version 2 +* IOTDB-593 add metaOffset in TsFileMetadata +* IOTDB-597 Rename methods in Session: insertBatch to insertTablet, insertInBatch to insertRecords, insert to insertRecord +* RPC is incompatible, you can not use client-v0.9 to connect with server-v0.10 +* TsFile format is incompatible, will be upgraded when starting 0.10 +* Refine exception code in native api + +## Miscellaneous changes + +* IOTDB-190 upgrade from antlr3 to antlr4 +* IOTDB-418 new query engine +* IOTDB-429 return empty dataset instead of throw exception, e.g., show child paths root.* +* IOTDB-445 Unify the keyword of "timestamp" and "time" +* IOTDB-450 Add design documents +* IOTDB-498 Support date format "2020-02-10" +* IOTDB-503 Add checkTimeseriesExists in java native api +* IOTDB-605 Add more levels of index in TsFileMetadata for handling too many series in one device +* IOTDB-625 Change default level number: root is level 0 +* IOTDB-628 rename client to cli +* IOTDB-621 Add Check isNull in Field for querying using session +* IOTDB-632 Performance improve for PreviousFill/LinearFill +* IOTDB-695 Accelerate the count timeseries query +* IOTDB-707 Optimize TsFileResource memory usage +* IOTDB-730 continue write in MQTT when some events are failed +* IOTDB-729 shutdown uncessary threadpool +* IOTDB-733 Enable setting for mqtt max length +* IOTDB-732 Upgrade fastjson version to 1.2.70 +* Allow "count timeseries" without a prefix path +* Add max backup log file number +* add rpc compression api in client and session module +* Continue writing the last unclosed file +* Move the vulnera-checks section into the apache-release profile to accelerate compile +* Add metaquery in python example +* Set inferType of MQTT InsertPlan to true + + + +## Bug Fixes + +* IOTDB-125 Potential Concurrency bug while deleting and inserting happen together +* IOTDB-185 fix start-client failed on WinOS if there is blank space in the file path; let start-server.bat suport jdk12,13 etc +* IOTDB-304 Fix bug of incomplete HDFS URI +* IOTDB-341 Fix data type bug in grafana +* IOTDB-346 Fix a bug of renaming tsfile in loading function +* IOTDB-370 fix a concurrent problem in parsing sql +* IOTDB-376 fix metric to show executeQuery +* IOTDB-392 fix export CSV +* IOTDB-393 Fix unclear error message for no privilege users +* IOTDB-401 Correct the calculation of a chunk if there is no data in the chunk, do not flush empty chunk +* IOTDB-412 Paths are not correctly deduplicated +* IOTDB-420 Avoid encoding task dying silently +* IOTDB-425 fix can't change the root password. +* IOTDB-459 Fix calmem tool bug +* IOTDB-470fix IllegalArgumentException when there exists 0 byte TsFile +* IOTDB-529 Relative times and NOW() operator cannot be used in Group By +* IOTDB-531 fix issue when grafana visualize boolean data +* IOTDB-546 Fix show child paths statement doesn't show quotation marks +* IOTDB-643 Concurrent queries cause BufferUnderflowException when storage in HDFS +* IOTDB-663 Fix query cache OOM while executing query +* IOTDB-664 Win -e option +* IOTDB-669 fix getting two columns bug while âshow devicesâ in session +* IOTDB-692 merge behaves incorrectly +* IOTDB-712 Meet BufferUnderflowException and can not recover +* IOTDB-718 Fix wrong time precision of NOW() +* IOTDB-735 Fix Concurrent error for MNode when creating time series automatically +* IOTDB-738 Fix measurements has blank + +* fix concurrent auto create schema conflict bug +* fix meet incompatible file error in restart +* Fix bugs of set core-site.xml and hdfs-site.xml paths in HDFS storage +* fix execute flush command while inserting bug +* Fix sync schema pos bug +* Fix batch execution bug, the following sqls will all fail after one error sql +* Fix recover endTime set bug + + +# Apache IoTDB (incubating) 0.9.3 + +## Bug Fixes +- IOTDB-531 Fix that JDBC URL does not support domain issue +- IOTDB-563 Fix pentaho cannot be downloaded because of spring.io address +- IOTDB-608 Skip error Mlog +- IOTDB-634 Fix merge caused errors for TsFile storage in HDFS +- IOTDB-636 Fix Grafana connector does not use correct time unit + +## Miscellaneous changes +- IOTDB-528 Modify grafana group by +- IOTDB-635 Add workaround when doing Aggregation over boolean Series +- Remove docs of Load External Tsfile +- Add Grafana IoTDB Bridge Artifact to distribution in tools/grafana folder + + +# Apache IoTDB (incubating) 0.9.2 + +## Bug Fixes +- IOTDB-553 Fix Return Empty ResultSet when queried series doesn't exist +- IOTDB-575 add default jmx user and password; fix issues that jmx can't be accessed remotely +- IOTDB-584 Fix InitializerError when recovering files on HDFS +- Fix batch insert once an illegal sql occurs all the sqls after that will not succeed +- Fix concurrent modification exception when iterator TsFileResourceList +- Fix some HDFS config issues +- Fix runtime exception not be catched and sync schema pos was nullpointer bug in DataTransferManager +- Fix python rpc grammar mistakes +- Fix upgrade ConcurrentModificationException + +## Miscellaneous changes +- IOTDB-332 support Chinese characters in path +- IOTDB-316 add AVG function to 4-SQL Reference.md and modify style +- improve start-server.bat by using quotes to protect against empty entries +- Add Chinese documents for chapter 4.2 +- change download-maven-plugin to 1.3.0 +- add session pool +- add insertInBatch in Session +- add insertInBatch to SessionPool +- modify 0.9 docs to fit website +- remove tsfile-format.properties +- add bloom filter in iotdb-engien.properties +- update server download doc +- typos fix in Rel/0.9 docs +- support 0.12.0 and 0.13.0 thrift + +# Apache IoTDB (incubating) 0.9.1 + +## Bug Fixes + +- IOTDB-159 Fix NullPointerException in SeqTsFileRecoverTest and UnseqTsFileRecoverTest +- IOTDB-317 Fix a bug that "flush + wrong aggregation query" causes the following queries to fail +- IOTDB-324 Fix inaccurate statistics when writing in batch +- IOTDB-327 Fix a groupBy-without-value-filter query bug caused by the wrong page skipping logic +- IOTDB-331 Fix a groupBy query bug when axisOrigin-startTimeOfWindow is an integral multiple of interval +- IOTDB-357 Fix NullPointerException in ActiveTimeSeriesCounter +- IOTDB-359 Fix a wrong-data-type bug in TsFileSketchTool +- IOTDB-360 Fix bug of a deadlock in CompressionRatio +- IOTDB-363 Fix link errors in Development-Contributing.md and add Development-Document.md +- IOTDB-392 Fix a bug in CSV export tool +- Fix apache rat header format error in some files + +## Miscellaneous changes + +- IOTDB-321 Add definitions of time expression and LEVEL in related documents +- Support pypi distribution for Python client + +# Apache IoTDB (incubating) 0.9.0 + +## New Features + +* IOTDB-143 Compaction of data file +* IOTDB-151 Support number format in timeseries path +* IOTDB-158 Add metrics web service +* IOTDB-173 Add batch write interface in session +* IoTDB-174 Add interfaces for querying device or timeseries number +* IOTDB-187 Enable to choose storage in local file system or HDFS +* IOTDB-188 Delete storage group +* IOTDB-193 Create schema automatically when inserting +* IOTDB-198 Add sync module (Sync TsFiles between IoTDB instances) +* IOTDB-199 Add a log visualization tool +* IOTDB-203 Add "group by device" function for narrow table display +* IOTDB-205 Support storage-group-level Time To Live (TTL) +* IOTDB-208 Add Bloom filter in TsFile +* IOTDB-223 Add a TsFile sketch tool +* IoTDB-226 Hive-TsFile connector +* IOTDB-239 Add interface for showing devices +* IOTDB-241 Add query and non query interface in session +* IOTDB-249 Enable lowercase in create_timeseries sql +* IOTDB-253 Support time expression +* IOTDB-259 Level query of path +* IOTDB-282 Add "show version" +* IOTDB-294 Online upgrade from 0.8.0 to 0.9.0 +* Spark-iotdb-connector +* Support quoted measurement name +* Generate cpp, go, and python thrift files under service-rpc +* Display cache hit rate through jconsole +* Support inserting data that time < 0 +* Add interface (Delete timeseries) in session +* Add a tool to print tsfileResources (each device's start and end time) +* Support watermark feature +* Add micro and nano timestamp precision + +## Incompatible changes + +* RPC is incompatible, you can not use client-0.8.0 to connect with server-0.9.0 or use client-0.9.0 to connect with server-0.8.0. +* Server is backward compatible, server-0.9.0 could run on data folder of 0.8.0. The data file will be upgraded background. +* Change map key in TsDigest from String to enum data type + +## Miscellaneous changes + +* IOTDB-144 Meta data cache for query +* IOTDB-153 Further limit fetchSize to speed up LIMIT&OFFSET query +* IOTDB-160 External sort +* IOTDB-161 Add ErrorCode of different response errors +* IOTDB-180 Get rid of JSON format in "show timeseries" +* IOTDB-192 Improvement for LRUCache +* IOTDB-210 One else if branch will never be reached in the method optimize of ExpressionOptimizer +* IOTDB-215 Update TsFile sketch tool and TsFile docs for v0.9.0 +* IOTDB-221 Add a python client example +* IOTDB-233 keep metadata plan clear +* IOTDB-251 Improve TSQueryDataSet structure in RPC +* IOTDB-257 Makes the client stop fetch when dataSize equals maxPrintRowCount and change client fetchSize less than maxPrintRowCount +* IOTDB-258 Add documents for Query History Visualization Tool and Shared Storage Architecture +* IOTDB-265 Re-adjust the threshold size of memtable +* IOTDB-267 Reduce IO operations in deserializing chunk header +* IOTDB-273 Parallel recovery +* IOTDB-276 Fix inconsistent ways of judging whether a Field is null +* IOTDB-285 Duplicate fields in EngineDataSetWithoutValueFilter.java +* IOTDB-287 Restrict users to only use domain names and IP addresses. +* IOTDB-293 Variable naming convention +* IOTDB-295 Refactor db.exception +* Reconstruct Antlr3 grammar to improve performance +* Tooling for release +* Modified Decoder and SequenceReader to support old version of TsFile +* Remove jdk constrain of jdk8 and 11 +* Modify print function in AbstractClient +* Avoid second execution of parseSQLToPhysicalPlan in executeStatement + +## Known Issues + +* IOTDB-20 Need to support UPDATE + +## Bug Fixes + +* IOTDB-168&169 Fix a bug in export-csv tool and fix compatibility of timestamp formats in exportCsv, client display and sql +* IOTDB-174 Fix querying timeseries interface cannot make a query by the specified path prefix +* IOTDB-195 Using String.getBytes(utf-9).length to replace string.length() in ChunkGroupMetadata for supporting Chinese +* IOTDB-211 Use "%IOTDB_HOME%\lib\*" to refers to all .jar files in the directory in start-server.bat +* IOTDB-240 Fix unknown time series in where clause +* IOTDB-244 Fix bug when querying with duplicated columns +* IOTDB-252 Add/fix shell and bat for TsFileSketchTool/TsFileResourcePrinter +* IOTDB-266 NullPoint exception when reading not existed devices using ReadOnlyTsFile +* IOTDB-264 Restart failure due to WAL replay error +* IOTDB-290 Bug about threadlocal field in TSServiceImpl.java +* IOTDB-291 Statement close operation may cause the whole connection's resource to be released +* IOTDB-296 Fix error when skip page data in sequence reader +* IOTDB-301 Bug Fix: executing "count nodes root" in client gets "Msg:3" +* Fix Dynamic Config when Creating Existing SG or Time-series +* Fix start-walchecker scripts for letting user define the wal folder +* Fix start script to set JAVA_HOME + +# Apache IoTDB (incubating) 0.8.2 + + This is a bug-fix version of 0.8.1 + +- IOTDB-264 lack checking datatype before writing WAL +- IOTDB-317 Fix "flush + wrong aggregation" causes failed query in v0.8.x +- NOTICE and LICENSE file update + +# Apache IoTDB (incubating) 0.8.1 + +This is a bug-fix version of 0.8.0 + +* IOTDB-172 Bug in updating startTime and endTime in TsFileResource +* IOTDB-195 Bug about 'serializedSize' in ChunkGroupMetaData.java (for Chinese string) +* IOTDB-202 fix tsfile example data type +* IOTDB-242 fix mvn integration-test failed because the files in the target folder changes +* Abnormal publishing of sequence and unsequence data folders in DirectoryManager +* Fix a bug in TimeRange's intersects function + + +# Apache IoTDB (incubating) 0.8.0 + +This is the first official release of Apache IoTDB after joining the Incubator. + +## New Features + +* IOTDB-1 Add Aggregation query +* IOTDB-4 Asynchronously force sync WAL periodically +* IOTDB-5 Support data deletion +* IOTDB-11 Support start script for jdk 11 on Windows OS +* IOTDB-18 Improve startup script compatible for jdk11 +* IOTDB-36 [TsFile] Enable recover data from a incomplete TsFile and continue to write +* IOTDB-37 Add WAL check tool script +* IOTDB-51 Update post-back module to synchronization module +* IOTDB-59 Support GroupBy query +* IOTDB-60 Support Fill function when query +* IOTDB-73 Add REGULAR encoding method for data with fixed frequency +* IOTDB-80 Support custom export file name +* IOTDB-81 Update travis for supporting JDK11 on Windows +* IOTDB-83 Add process bar for import script and show how many rows have been exported +* IOTDB-91 Improve tsfile-spark-connector to support spark-2.4.3 +* IOTDB-93 IoTDB Calcite integration +* IOTDB-109 Support appending data at the end of a completed TsFile +* IOTDB-122 Add prepared statement in JDBC +* IOTDB-123 Add documents in Chinese +* IOTDB-130 Dynamic parameters adapter +* IOTDB-134 Add default parameter for client starting script +* Add read-only mode of IoTDB +* New storage engine with asynchronously flush and close data file +* Adding english documents +* Supporting travis + window + jdk8 +* Add skipping all UTs: maven integration-test -DskipUTS=true +* Enable users define the location of their thrift compiler +* Add example module +* Add a log appender: put info, warn, error log into one file and disable log_info by default +* Recover when resource file does not exist while tsfile is complete + +## Incompatible changes + +If you use the previous unofficial version 0.7.0. It is incompatible with 0.8.0. + +## Miscellaneous changes + +* IOTDB-21 Add ChunkGroup offset information in ChunkGroupMetaData +* IOTDB-25 Add some introduction for JMX MBean Monitor in user guide +* IOTDB-29 Multiple Exceptions when reading empty measurements from TsFileSequenceReader +* IOTDB-39 Add auto repair functionality for RestorableTsFileIOWriter +* IOTDB-45 Update the license in IoTDB +* IOTDB-56 Faster getSortedTimeValuePairList() of Memtable +* IOTDB-62 Change log level from error to debug in SQL parser +* IoTDB-63 Use TsFileInput instead of FileChannel as the input parameter of some functions +* IOTDB-76 Reformat MManager.getMetadataInString() in JSON format +* IOTDB-78 Make unsequence file format more similar with TsFile +* IOTDB-95 Keep stack trace when logging or throwing an exception +* IOTDB-117 Add sync documents +* Modify ASF header for each file and add related maven plugin +* Add IoTDB env script test +* Add sync function for jdbc server to close +* Add cache directories for download jars and sonar plugin of maven in travis +* Add partition start and end offset constraints when loading ChunkGroupMetaData +* Check when creating Storage group +* Try to release memory asap in ReadOnlyMemChunk +* Add more physical plan serializer +* Move all generated tsfiles for test into the target folder +* Make TsFileWriter as AutoClosable +* Print apache-rat violation result on console +* Update multi dir avoid disk is full +* Simplify Path construction +* Separate documents into different chapter folders +* Suppress mvn log in travis +* Add mvn -B in travis + +## Known Issues + +* IOTDB-20 Need to support UPDATE +* IOTDB-124 Lost timeseries info after restart IoTDB +* IOTDB-125 [potential] a concurrency conflict may occur when a delete command and insertion command appears concurrently +* IOTDB-126 IoTDB will not be closed immediately after run 'stop-server.sh' script +* IOTDB-127 Chinese version documents problems + +## Bug Fixes + +* IOTDB-2 Maven Test failed before run mvn package -Dmaven.test.skip=true +* IOTDB-7 OpenFileNumUtilTest failed +* IOTDB-15 Fail to install IoTDB on Ubuntu 14.04 +* IOTDB-16 Invalid link on https://iotdb.apache.org/#/Documents/Quick Start +* IOTDB-17 Need to update chapter Start of https://iotdb.apache.org/#/Documents/Quick Start +* IOTDB-18 IoTDB startup script does not work on openjdk11 +* IOTDB-19 Fail to start start-server.sh script on Ubuntu 14.04/Ubuntu 16.04 +* IOTDB-22 BUG in TsFileSequenceReader when reading tsfile +* IOTDB-24 DELETION error after restart a server +* IOTDB-26 Return error when quit client +* IOTDB-27 Delete error message +* IOTDB-30 Flush timeseries cause select to returns "Msg:null" +* IOTDB-31 Cannot set float number precision +* IOTDB-34 Invalid message for show storage group +* IOTDB-44 Error message in server log when select timeseries +* IOTDB-49 Authorizer module outputs too many debug log info +* IOTDB-50 DataSetWithoutTimeGenerator's initHeap behaves wrongly +* IOTDB-52 Cli doesn't support aggregate +* IOTDB-54 Predicates doesn't take effect +* IOTDB-67 ValueDecoder reading new page bug +* IOTDB-70 Disconnect from server when logging in fails +* IOTDB-71 Improve readPositionInfo +* IOTDB-74 THe damaged log will be skipped if it is the only log +* IOTDB-79 Long term test failed because of the version control of deletion function +* IOTDB-81 Fix Windows OS environment for Travis-CI +* IOTDB-82 File not closed in PageHeaderTest and cause UT on Windows fails +* IOTDB-84 Out-of-memory bug +* IOTDB-94 IoTDB failed to start client since the required jars are not in the right folder +* IOTDB-96 The JDBC interface throws an exception when executing the SQL statement "list user" +* IOTDB-99 List privileges User <username> on <path> cannot be used properly +* IOTDB-100 Return error message while executing sum aggregation query +* IOTDB-103 Does not give a hint when encountering unsupported data types +* IOTDB-104 MManager is incorrectly recovered when system reboots +* IOTDB-108 Mistakes in documents +* IOTDB-110 Cli inserts data normally even if there is no space left on the disk +* IOTDB-118 When the disk space is full, the storage group is created successfully +* IOTDB-121 A bug of query on value columns +* IOTDB-128 Probably a bug in iotdb official website +* IOTDB-129 A bug in restoring incomplete tsfile when system restart +* IOTDB-131 IoTDB-Grafana-Connector module error when getting the timeseries list from Grafana +* IOTDB-133 Some content is mistaken for links +* System memory check failure in iotdb-env.sh +* Time zone bug in different region +* DateTimeUtilsTest UT bug +* Problem discovered by Sonar +* Openjdk11 + linux11 does not work on travis +* Start JDBC service too slowly +* JDBC cannot be closed +* Close bug in sync thread +* Bug in MManager to get all file names of a path +* Version files of different storage groups are placed into the same place +* Import/export csv script bug +* Log level and stack print in test +* Bug in TsFile-Spark-Connector +* A doc bug of QuickStart.md
