Jan Froehlich wrote:
Can no one give me a hint with that?? All sources (google, books...) say that it is really easy to work with that interceptor...
Error messages usually have useful content:
java.lang.UnsupportedOperationException at java.util.Collections$UnmodifiableMap.put
org.apache.struts2.interceptor.ExecuteAndWaitInterceptor.doIntercept(ExecuteAndWaitInterceptor.java:250)
It's saying that the Map<String,ResultConfig> object returned by the getResults() call on the ActionConfig is Unmodifiable and therefore the put call that's trying to magically create a "wait" result is failing.
So create a "wait" page and you should be able to avoid this error. I'm not sure why this is happening, but the workaround appears clear.
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