[ANNOUNCE] Apache IoTDB 0.12.3 released

[Haonan Hou <ha...@apache.org>]

The Apache IoTDB team is pleased to announce the release of Apache IoTDB
0.12.3.

Apache IoTDB (Database for Internet of Things) is an IoT native database
with high performance for data management and analysis, deployable on the
edge and the cloud.

This is a bug-fixed version of 0.12.2, which includes a number of improvements:

## 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 lo=
op
* [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 insynchronized 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


The full release note is available at:
https://raw.githubusercontent.com/apache/iotdb/v0.12.3/RELEASE_NOTES.md

The release is available for download at:
http://iotdb.apache.org/Download

Maven artifacts for JDBC driver, session SDK, TsFile SDK, Spark-connector,
Hadoop-connector, Hive-connector and Flink-connector can be found at:
https://search.maven.org/search?q=3Dg:org.apache.iotdb


Docker image of IoTDB server can be found at:
https://hub.docker.com/r/apache/iotdb

Python API package can be found at:
https://pypi.org/project/apache-iotdb/


Regards,
The Apache IoTDB team