Hello,
We got two Redhat 5.6 Server which are set up idential in the area of tomcat
and java. But we have the problem that on the productive machine compilation of
JSP files fails with the error 'return type incompatible with
JspSourceDependent.getDependants'. The exact same application compiles just
fine on the test machine.
It fails to compile a simple index.jsp on the productive server because the
generated index_jsp.java files differs.
Version information:
Server version: Apache Tomcat/5.5.23
Server built: Dec 9 2010 03:51:37
Server number: 5.5.23.0
OS Name: Linux
OS Version: 2.6.18-238.el5
Architecture: amd64
JVM Version: 1.6.0_22-b04
JVM Vendor: Sun Microsystems Inc.
--- index.jsp (on both server) ---
<%
response.sendRedirect("login.jsp");
%>
-----------------
the automatically generated index_jsp.java diffiers in the following lines:
------------------------------------------------------------------------------
--- index_jsp.java_not-compiling 2011-01-27 08:38:46.000000000 +0100
+++ index_jsp.java_compiling-fine 2011-01-27 08:38:41.000000000 +0100
@@ -7,9 +7,9 @@
public final class index_jsp extends org.apache.jasper.runtime.HttpJspBase
implements org.apache.jasper.runtime.JspSourceDependent {
- private static java.util.Vector _jspx_dependants;
+ private static java.util.List _jspx_dependants;
- public java.util.List getDependants() {
+ public Object getDependants() {
return _jspx_dependants;
}
------------------------------------------------------------------------------
Java-wise it's clear why it won't compile. What we don't understand is why the
automatically generated *.java file differs.
We made sure both server are idential:
- both RHEL5 installation are at the exact same update level
- the same tomcat, java & jasper version (stock RHEL5.6 packages) are installed
- identical tomcat configuration files (verified by creating md5 sums of 'em in
/etc/tomcat5)
- identical environment settings for the tomcat user on both servers
- tomcat is called idential (check /proc/<tomcat pid>/{cmdline,environ})
- the same user and file permission
- the web app is identical (copied from one system to the other)
- all the *.jar files are idential (verified by creating md5 sums of 'em)
Does anyone have an idea what else we could check?
Is it possible to 'simulate' a jasper build, e.g. with a custom build.xml,
manually to be able to see what causes the error?
I asked the oracle of Google for help for almost a day but couldn't find
matching solution. One possible cause could be different versions of jasper
installed. But I couldn't find anything suspicious.
Thanks and have a good day,
Thomas Kupper
Siemens Schweiz AG
Siemens IT Solutions and Services
SIS GO SD AO
Freilagerstrasse 28, CH-8047 Zürich
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