Minor release with the following improvements and bug fixes:

Improvements:

• Core:
  • Alarm Query performance improvements;
  • Multi-root relation queries;
  • Ability to configure default null ordering in SQL requests;
  • REST API to fetch TB application version;
  • Do not persist empty stats to reducing event table size and disk IOPS;
  • Minor improvements to the thingsboard.yml comments;
  • Add password policy for white-spaces;
  • Notify IoT gateway about delete or rename of the device;
  • #5200 'IN' and 'NOT IN' conditions for the dashboard / alarm rule filters;
  • #5749 Queue factories;
  • #5760 SQL and TS batch thread count 3 for better hash distribution;
  • #5814 API to clear events using filter;
• Rule Engine:
  • Support of nested rule-chains with multiple outputs;
  • #5569 Ability to save time-series data without update of the latest values. Useful for performance improvements in case on hybrid DB setup;
  • Reduce CPU overhead for versions with in-memory cache;
  • Environment variable to configure in-memory cache;
  • #5843 Device actor session inactivity performance + memory footprint optimizations;
  • #5751 Transactional deletion of device and proper cache eviction
  • #5550 Upgrade enrichment attributes rule node;
  • Misc performance improvements: immutable structures, pre-defined protobuf objects, etc;
  • #5865 Added functionality to support 3.3.0 edge version rule chains;
  • #5762 Suffix for the "clientId" param in the MQTT rule node;
  • #5821 Add ignoreMetadataTs to 'save timeseries' rule node;
  • #5889 Reduced number of scheduled messages for session timeout;
  • #5921 Propagate alarms to Customer or Tenant without relations;
  • #5926 Use message timestamp as alarm start timestamp in the 'create alarm' rule node;
  • #5687 Self-intersecting polygons, polygons with holes, multiple polygons support;
• UI:
  • Migration to Angular 12;
  • Widget to embed different dashboard state;
  • Ability to embed dashboard states inside markdown widget;
  • #5942 Add script to generate data structures for custom widgets;
  • #5797 Separate pages for entity details;
  • #5770 Editor of markers and polygons in maps widgets;
  • #5757 Improvement of multiple attribute widget;
  • #5629 Widget to display Persistent RPC calls;
  • #5856 Persistent page link for entities pages;
  • Create nested rule chain from the selected region in the rule chain editor;
  • Add tooltip offset settings for map widgets;
  • #5655 Hide page size option on mobile view;
  • #5772 Show legend settings in time-series and latest widgets only;
  • #5795 Disable column sort if enable post-processing function;
  • #5876 Image map resize calculates center position correctly;
  • #5882 New map widget settings: "Disable zoom control";
  • #5910 Added additional condition to define showTitleIcon;
• Transport:
  • LwM2M:
    • Ability to define network configuration;
    • #5930 Updated Eclipse Leshan version to 2.0.0-M5;
    • Support of Base64 format to define client keys in RPK and X509 mode;
    • Introduce support of new commands: Read-Composite, Write-Composite. Multiple-Instance Resources Read and Write;
    • Introduce support of new content formats: SenML JSON, SenML CBOR;
    • Improvements to configuration of Bootstrap behavior via Device Profile;
    • Bootstrap server now supports: Read, Discover, Write, Delete commands;
  • CoAP:
    • #5930 Updated Californium version to 3.0.0;
  • SNMP:
    • Add Redis config for SNMP transport;
  • MQTT:
    • [5875] IP Rate limits for MQTT;
• Security:
  • Update version of log4j-core, log4j-api and log4j-to-slf4j;
  • Ability to limit alarm queries invocation count;
  • #5823 Add NO XSS validation for names of rule nodes;
• Build scripts:
  • Support of linux/arm64 docker containers;
  • SQL tests are now running on real PostgreSQL instead of HSQL;
  • Update grpc and netty versions to proper handle native windows ssl libraries;

Bug fixes:

• Core & Rule Engine:
  • Upgrade of device profiles from 3.2.2;
  • #5492 Conversion of double values in WS subscriptions;
  • #5753 Unsorted page link replaced with sort by id ASC;
  • #5744 remediation for log4shell CVE-2021-45105;
  • Link to Wiki page about UUID in REST API documentation;
  • Notification about deleted attributes in the cluster mode;
  • #5750 Notification about deleted time-series records;
  • #5657 Fix search API Swagger description;
  • #5793 Added functionality to handle pong responses on web sockets;
  • #5822 Do not update WS last activity in case of general response;
  • Removing old OTA tag if new tag is empty during OTA scheduling;
  • #5869 Don't allow system administrator to delete himself;
  • #5864 Fixed aggregation by timezone in Timescale;
  • Ignore no longer valid messages when processing strategy is completed or timed-out;
  • #5557 Fix NPE in case of incorrect partitioning name parameter;
  • #5787 Removed incorrect statistics calculation for regularQueryInvocationCnt/regularQueryInvocationTime;
  • #5659 Add rpc response error when retry attempts ended;
  • #5852 Support of double type in 'save to custom table' rule node;
  • Prevent click actions and popup open while dragging the marker in map widgets.
• UI:
  • #5755 Support of rectangles with cut area;
  • Layout for Firefox;
  • Open dashboard state in separate dialog showed a blank dialog;
  • Right layout and state name propagation in mobile app;
  • Resolve alias filter for query alias types;
  • JSON form default values handling;
  • #5529 Chinese translation for the API usage;
  • #5778 Filter forms: constant type and boolean value;
  • #5805 Help link for OTA updates;
  • #5813 Cancel event on color picker;
  • #5832 Problematic letters for different languages;
  • #5872 Error in device-profile-autocomplete and tenant-profile-autocomplete in clear;
  • #5879 Prevent saving of invalid form in the multiple input widget;
  • #5883 Fixed OTA package autocomplete;
  • #5913 Date Range Navigator: the calendar when selecting dates should be horizontal;
  • #5923 Asset models added to public api;
  • #5928 Fixed help link URL for the 'Add user' dialog;
  • #5931 The timestamp of the exception in the Rule Engine Statistics dashboard is wrong;
  • #5948 Change "snpm" directory to "snmp";
• Transport:
  • LwM2M:
    • duplicated OTA update after device awake from PSM/eDRX;
    • #5716 added ability to send LwM2M model updates after sleeping;
    • #5878 correct handling of device profile update;
    • #5953 subscription to RPC and Attributes;
    • #5955 initialization order;
    • Bugs with OTA update sequence on client reboot or reconnect;
  • MQTT:
    • Corner case when access token matches user name in credentials;
    • #5792 Invalid serialization of '=' to \u003d in JsonMqttAdaptor;
    • #5788 Reduce MQTT info logs for connect/disconnect events;
    • #5796 Response format of multiple attributes request;
• Rest Client:
  • #5566 Fixed widget type based methods in rest client;
• Edge:
  • #5922 Minor fixes and code review comments;
• Build scripts:
  • Integration test lifecycle;
  • #5672 CASSANDRA_KEYSPACE_NAME ignored during install;