Major Description
I suspect behaviour is related to JBOSS AS7 but may not be.
When you request a xwiki page with parameters, even if the parameters are kepts the same, you have a cache miss. So page is rendered each time. Reason is this code, in DefaultRenderingCache
private String getRequestParameters(XWikiContext context) { if (context.getRequest() != null) { Map<String, String> parameters = context.getRequest().getParameterMap(); if (parameters != null) { if (parameters.containsKey(PARAMETER_REFRESH)) { parameters = new HashMap<String, String>(parameters); parameters.remove(PARAMETER_REFRESH); } return parameters.toString(); } } return ""; }
It renders something like
{menu=[Ljava.lang.String;@3e5da853, xpage=[Ljava.lang.String;@76d60121}
which is then used in the cache key along with page name and source code.
This comes from the fact HttpServletRequest.getParameterMap() return String -> String[] association, event if parameters have only one value.
Solution is to replace method with this code:
private String getRequestParameters(XWikiContext context) { if (context.getRequest() != null) { Map<String, Object> parameters = context.getRequest().getParameterMap(); StringBuffer buffer = new StringBuffer(50); buffer.append('{'); for (Map.Entry<String,Object> item : parameters.entrySet()){ if (!PARAMETER_REFRESH.equals(item.getKey())){ buffer.append(item.getKey()).append('='); if (item.getValue() instanceof Object[]) buffer.append(Arrays.deepToString((Object[])item.getValue())); else buffer.append(item.getValue()); } } buffer.append('}'); return buffer.toString(); } return ""; }
And then, no more problems.