Description
I was unwittingly using the classic RequestProcessor when attempting to use postback forms. Unfortunately, I got a NPE:
java.lang.NullPointerException
org.apache.struts.taglib.TagUtils.getActionMappingName(TagUtils.java:583)
org.apache.struts.taglib.html.FormTag.lookup(FormTag.java:834)
org.apache.struts.taglib.html.FormTag.doStartTag(FormTag.java:467)
I traced the problem back to a missing step in the classic RP. It does not set the ORIGINAL_URI key like the ComposableRequestProcessor. However, FormTag should explain this condition when a postback form is used but the key is absent.