Since 7.1 you can use a new webservice client framework called CXF. In the same time we have deprecated the legacy AXIS 1 and AXIS 2 frameworks. There are no known issues with the CXF stack, whereas the AXIS stack has a lot of problems.
We are planning to remove AXIS 1/2. Do you have concerns when we remove it? When it is removed, you will need to switch all existing AXIS calls to CXF.