Lorenz Quack created QPID-7823:
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             Summary: [Java Broker] [AMQP1.0] Contradicting message-formats on 
multi transfer deliveries should result in error
                 Key: QPID-7823
                 URL: https://issues.apache.org/jira/browse/QPID-7823
             Project: Qpid
          Issue Type: Bug
          Components: Java Broker
            Reporter: Lorenz Quack


The AMQP specification states in [section 
2.7.5|http://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-transport-v1.0-os.html#type-transfer]
 about the message-format field of the Transfer performative:
bq. This field MUST be specified for the first transfer of a multi-transfer 
message and can only be omitted for continuation transfers. It is an error if 
the message-format on a continuation transfer differs from the message-format 
on the first transfer of a delivery.

We currently do not enforce this. Currently we just take the value of the first 
transfer that specifies it and ignore all subsequent values which is not spec 
compliant. We also allow it to be unspecified (i.e., null) in which case we 
default to UnsignedInteger(0).

[AMQP-130|https://issues.oasis-open.org/browse/AMQP-130] was raised to clarify 
how to handle the error case.




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