diff --git a/changes/ce/fix-13216.en.md b/changes/ce/fix-13216.en.md index 2fe85c6b2..8a82de518 100644 --- a/changes/ce/fix-13216.en.md +++ b/changes/ce/fix-13216.en.md @@ -1,10 +1,10 @@ Respcet `clientid_prefix` config for MQTT bridges. -As of version 5.4.1, EMQX limits MQTT Client ID lengths to 23 bytes. -Previously, the system included the `clientid_prefix` in the hash calculation of the original, excessively long Client ID, thereby impacting the resulting shortened ID. +As of version 5.4.1, EMQX limits MQTT client ID lengths to 23 bytes. +Previously, the system included the `clientid_prefix` in the hash calculation of the original unique, but long client ID, thereby impacting the resulting shortened ID. Change Details: -- Without Prefix: Behavior remains unchanged; EMQX will hash the entire Client ID into a 23-byte space (when longer than 23 bytes). +- Without Prefix: Behavior remains unchanged; EMQX will hash the long (> 23 bytes) client ID into a 23-byte space. - With Prefix: - - Prefix no more than 19 bytes: The prefix is preserved, and the remaining suffix is hashed into a 4-byte space. - - Prefix is 20 or more bytes: EMQX no longer attempts to shorten the Client ID, respecting the configured prefix in its entirety. + - Prefix no more than 19 bytes: The prefix is preserved, and the client ID is hashed into a 4-byte space capping the length within 23 bytes. + - Prefix is 20 or more bytes: EMQX no longer attempts to shorten the client ID, respecting the configured prefix in its entirety.