Details
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Bug
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Resolution: Invalid
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P2: Important
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None
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5.15.1
Description
When using QtMqtt with thingsboard as a server then the fixed PUBACK header can end up with the reserved part being set to 2 which causes it to fail as it is expecting the reserved part to be set to 0. When it is set to 2 then it will fail with the message: Malformed fixed header for UNSUBACK/PUBACK/PUBREC/PUBCOMP.