The values of the wsa:Action element of the addressing header change according to the following conditions:

• Is the javax.xml.ws.Action annotation specified in the SEI method?
• Is the wsaw:Action attribute coded in the WSDL?

The following table lists and describes the relationship between the javax.xml.ws.Action annotation and wsaw:Action attribute and the values of the wsa:Action element:

Table 37-4 Values of the wsa:Action element

No.	Action annotation	wsaw:Action attribute	Value of the wsa:Action element
1	Specified	Coded	Value of the Action annotation
2		Not coded	Value of the Action annotation
3	Not specified	Coded	Value of the wsaw:Action attribute of WSDL
4		Not coded	Default Action value defined in the WS-Addressing 1.0 specifications

Specify the value of the wsa:Action element of the addressing header used by the Web Service for response or fault in the asynchronous communication as described above.

This point describes the precautions for receiving the request messages.

• If the value of the wsa:Action element differs in the addressing header of the received request message and the addressing header used by the Service-side JAX-WS engine, the attempt to invoke the Web Service will fail. An error occurs in the Web Service-side JAX-WS engine and a fault message containing the sub-sub code wsa:ActionNotSupported, defined in the WS-Addressing 1.0 specifications, is sent.
• If the value of the wsa:Action element of the addressing header in the received request message and the value of SOAPAction is different, an error occurs. However, if the value of SOAPAction is null (""), an error does not occur even if the value of wsa:Action element is not null. If an error occurs, the Web Service-side JAX-WS engine sends a fault message containing the sub-sub code wsa:ActionMismatch, defined in the WS-Addressing 1.0 specifications.