I get an occasional NullPointerException deep in JSTL when running under load on Tomcat 4.1.x. This doesn't occur under 4.0.x. Are the JSTL tags tested on Tomcat 4.1.x?
When this problem happens, the page half-loads (up to the tag that fails). Refreshing the page almost always works fine. Under heavy load, maybe 1 in 100 page executions cause this problem. Here is the deepest stack trace I have managed to obtain (by modifying the Jakarta taglibs slightly to print a little extra debugging): 2003-02-12 23:11:48,190 ERROR [STDERR] An error occurred while getting property "player" from an instance of class com.maxis.tso.community.tool.ThreadTool: java.lang.NullPointerException 2003-02-12 23:11:48,192 ERROR [STDERR] at org.apache.taglibs.standard.lang.jstl.Logger.logError(Logger.java:965) 2003-02-12 23:11:48,192 ERROR [STDERR] at org.apache.taglibs.standard.lang.jstl.Logger.logError(Logger.java:1173) 2003-02-12 23:11:48,192 ERROR [STDERR] at org.apache.taglibs.standard.lang.jstl.ArraySuffix.evaluate(ArraySuffix.j ava:321) 2003-02-12 23:11:48,192 ERROR [STDERR] at org.apache.taglibs.standard.lang.jstl.ComplexValue.evaluate(ComplexValue .java:146) 2003-02-12 23:11:48,192 ERROR [STDERR] at org.apache.taglibs.standard.lang.jstl.ELEvaluator.evaluate(ELEvaluator.j ava:242) 2003-02-12 23:11:48,193 ERROR [STDERR] at org.apache.taglibs.standard.lang.jstl.ELEvaluator.evaluate(ELEvaluator.j ava:201) 2003-02-12 23:11:48,193 ERROR [STDERR] at org.apache.taglibs.standard.lang.jstl.Evaluator.evaluate(Evaluator.java: 138) 2003-02-12 23:11:48,193 ERROR [STDERR] at org.apache.taglibs.standard.lang.jstl.Evaluator.evaluate(Evaluator.java: 167) 2003-02-12 23:11:48,193 ERROR [STDERR] at org.apache.taglibs.standard.lang.support.ExpressionEvaluatorManager.eval uate(ExpressionEvaluatorManager.java:112) 2003-02-12 23:11:48,193 ERROR [STDERR] at org.apache.taglibs.standard.tag.el.core.IfTag.condition(IfTag.java:95) 2003-02-12 23:11:48,193 ERROR [STDERR] at javax.servlet.jsp.jstl.core.ConditionalTagSupport.doStartTag(Conditional TagSupport.java:122) 2003-02-12 23:11:48,193 ERROR [STDERR] at org.apache.jsp.mb_posts_jsp._jspx_meth_c_if_4(mb_posts_jsp.java:3923) 2003-02-12 23:11:48,194 ERROR [STDERR] at org.apache.jsp.mb_posts_jsp._jspx_meth_c_if_3(mb_posts_jsp.java:3535) 2003-02-12 23:11:48,194 ERROR [STDERR] at org.apache.jsp.mb_posts_jsp._jspService(mb_posts_jsp.java:615) 2003-02-12 23:11:48,194 ERROR [STDERR] at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:136) 2003-02-12 23:11:48,194 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) 2003-02-12 23:11:48,194 ERROR [STDERR] at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.ja va:204) 2003-02-12 23:11:48,194 ERROR [STDERR] at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:289) 2003-02-12 23:11:48,194 ERROR [STDERR] at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:240) 2003-02-12 23:11:48,194 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) Does anyone have any idea what is happening? Thanks in advance, Jeff Schnitzer [EMAIL PROTECTED] The Sims Online --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
