v1.23-2 - New features and fixes

• Features:

  • Option in httpclient to silence error messages for PUT queries for a specified amount of time
  • New topic_filter_invert option
  • Support message expiry interval in v5 in MQTT broker
  • Set retain flag and expiry interval in MQTT client
  • Set will messages in MQTT client
  • Control subscriptions in MQTT client by sending in command messages
  • Control the tidy interval of the cacher module per configuration parameter

• Improvements:

  • Files in message database stored in a tree structure based on their hash filename for performance.
  • Asynchrounous operation in message DB for better performance with very large DBs
  • Tidy and revive intervals in cacher is calculated from the last completion of each of these processes.

• Fixes:

  • Prevent HTTP client from getting killed of if there are a lot of connection errors
  • Deadlock in mmap channel due to incorrect use of lock() instead of trylock()
  • Lockup in cmodules in high traffic situations
  • Sometimes temporary lockup in HTTP-server if there is not immediate downstream response to an h2c upgrade.
  • Poor hard timeout management in MQTT broker causing low-traffic clients to be kicked
  • Fix buffer overflow in httpclient when wide characters were given to an urlencoder function.
  • Fix random crashes in message DB when zero length files were found.

• Under the hood:

  • Cleanups in MQTT framework