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Date: Mon, 2 Feb 2009 08:40:51 -0800 (PST)
From: stanlick <stanlick@gmail.com>
To: dev@struts.apache.org
Subject: Changing log level generates NPE
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I added a file appender last night and set all logging to DEBUG.  Today I
started getting a NullPointerException at runtime.  I isolated the but to
the XWorkMapPropertyAccessor class where 

    public void setProperty(Map context, Object target, Object name, Object
value) throws OgnlException {
        if (LOG.isDebugEnabled()) {
     		LOG.debug("Entering
setProperty("+context+","+target+","+name+","+value+")");
     	}

does not test the concatenated args against null.  I can avoid the bug by
modifying my log4j.properties, but this was a real brainteaser to discover.

Peace,
Scott
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