Error in the installtion when "Begin Install" is clicked.

[Migrated From Jforum.net]

I am installing JForum at HostGator where Tomcat is behind Apache.

I am receiving an error which is listed below :

[color=blue]<meta name="description" content=" Expression metaDescription is undefined on line 6, column 37 in default/forum_base.htm. The problematic instruction: ---------- ==> ${metaDescription} [on line 6, column 35 in default/forum_base.htm] in include "default/forum_base.htm" [on line 7, column 1 in exception.html] ---------- Java backtrace for programmers: ---------- freemarker.core.InvalidReferenceException: Expression metaDescription is undefined on line 6, column 37 in default/forum_base.htm. at freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:124) at freemarker.core.Expression.getStringValue(Expression.java:118) at freemarker.core.Expression.getStringValue(Expression.java:93) at freemarker.core.DollarVariable.accept(DollarVariable.java:76) at freemarker.core.Environment.visit(Environment.java:171) at freemarker.core.MixedContent.accept(MixedContent.java:92) at freemarker.core.Environment.visit(Environment.java:171) at freemarker.core.Environment.include(Environment.java:1256) at freemarker.core.Include.accept(Include.java:156) at freemarker.core.Environment.visit(Environment.java:171) at freemarker.core.MixedContent.accept(MixedContent.java:92) at freemarker.core.Environment.visit(Environment.java:171) at freemarker.core.Environment.process(Environment.java:156) at freemarker.template.Template.process(Template.java:219) at net.jforum.exceptions.ExceptionWriter.handleExceptionData(ExceptionWriter.java:90) at net.jforum.InstallServlet.service(InstallServlet.java:135) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:306) at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:385) at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:745) at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:675) at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:868) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Thread.java:595) [/color] >

Any advice is greatly appreciated.
[originally posted on jforum.net by Anonymous]

[Migrated From Jforum.net]

You should look into Tomcat's logs. There you'll find the real error. This stack trace dont' tell us where the error is.

Rafael
[originally posted on jforum.net by Rafael Steil]

[Migrated From Jforum.net]

Do the following step for reinstallation

1. remove jforum-custom.conf under WEB-INF/config
2. restart Tomcat before installing jforum

I've met this kind of error too. So the best strategy is to restart Tomcat after you copy the stuff of jforum into webapps.
[originally posted on jforum.net by andowson]