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    <p>While waiting to see what the full stacktrace reveals, here's another option. This <a href="http://code.google.com/appengine/docs/java/config/webxml.html#Filters" rel="nofollow noreferrer">filter</a> will look for JSTL config params in web.xml and set them as request attributes in the hope that this will short-circuit any need for GAE to access the session:</p> <pre><code>import java.io.IOException; import java.util.Map; import java.util.concurrent.ConcurrentHashMap; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import javax.servlet.jsp.jstl.core.Config; public class JSTLConfigFilter implements Filter { private static final String[] JSTL_CONFIG_PARAMS = { Config.FMT_FALLBACK_LOCALE, Config.FMT_LOCALE, Config.FMT_LOCALIZATION_CONTEXT, Config.FMT_TIME_ZONE, Config.SQL_DATA_SOURCE, Config.SQL_MAX_ROWS }; private final Map&lt;String, String&gt; jstlConfig = new ConcurrentHashMap&lt;String, String&gt;(); public void init(FilterConfig config) throws ServletException { ServletContext ctx = config.getServletContext(); for (String param : JSTL_CONFIG_PARAMS) { String value = ctx.getInitParameter(param); if (value != null) { this.jstlConfig.put(param, value); } } } public void destroy() { this.jstlConfig.clear(); } public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { for (Map.Entry&lt;String, String&gt; entry : this.jstlConfig.entrySet()) { Config.set(request, entry.getKey(), entry.getValue()); } chain.doFilter(request, response); } } </code></pre> <p>Variations are, of course, possible, but hopefully you get the idea...</p>
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    1. POJSTL fmt library throws 500 error, requires sessions enabled?
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    1. USkschneid
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    1. COThanks for your feedback. I implemented the Filter as you describe above, however disabling sessions still causes and error. I appended the stack trace to my question above.
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    2. COthe stacktrace indicates that the issue is with `<fmt:setLocale>`. how are you using it in your page? i believe one of the side-effects of `<fmt:setLocale>` is to try and store the response's char encoding in a session attribute. however, it should only do this if `PageContext.getSession()` is not null...
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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