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@@ -1,10 +1,10 @@
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Respcet `clientid_prefix` config for MQTT bridges.
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-As of version 5.4.1, EMQX limits MQTT Client ID lengths to 23 bytes.
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-Previously, the system included the `clientid_prefix` in the hash calculation of the original, excessively long Client ID, thereby impacting the resulting shortened ID.
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+As of version 5.4.1, EMQX limits MQTT client ID lengths to 23 bytes.
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+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.
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Change Details:
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-- Without Prefix: Behavior remains unchanged; EMQX will hash the entire Client ID into a 23-byte space (when longer than 23 bytes).
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+- Without Prefix: Behavior remains unchanged; EMQX will hash the long (> 23 bytes) client ID into a 23-byte space.
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- With Prefix:
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- - Prefix no more than 19 bytes: The prefix is preserved, and the remaining suffix is hashed into a 4-byte space.
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- - Prefix is 20 or more bytes: EMQX no longer attempts to shorten the Client ID, respecting the configured prefix in its entirety.
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+ - 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.
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+ - Prefix is 20 or more bytes: EMQX no longer attempts to shorten the client ID, respecting the configured prefix in its entirety.
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zmstone