what is "Must Understand check failed for header"error?
my service is issuing the following error that I do not understand why.
Can someone assist me regarding why and how to resolve this please?

[ERROR] Must Understand check failed for header http://www.w3.org/2005/08/addressing : Action
org.apache.axis2.AxisFault: Must Understand check failed for header http://www.w3.org/2005/08/addressing : Action

[解决办法]
看看这个有没有帮助:http://www.mail-archive.com/axis-user@ws.apache.org/msg38992.html