https://bz.apache.org/bugzilla/show_bug.cgi?id=65599
Bug ID: 65599
Summary: Tomcat 8.5 cannot compile JSPs with Java 17 (System
cannot be resolved)
Product: Tomcat 8
Version: 8.5.71
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P2
Component: Jasper
Assignee: dev@tomcat.apache.org
Reporter: denis.fuenzal...@microsoft.com
Target Milestone: ----
Created attachment 38049
--> https://bz.apache.org/bugzilla/attachment.cgi?id=38049&action=edit
Catalina output with the stacktrace when attempting to compile the JSP in Java
17
When running the latest Tomcat 8.5.71 with Java 17, it seems the version of ECL
bundled with Tomcat is too old and cannot load the classes from the JDK,
resulting in an error when compiling trivial JSPs like the following:
<%@ page session="false" pageEncoding="UTF-8" contentType="text/html;
charset=UTF-8" %>
<!DOCTYPE html>
<html>
<body>
<%= System.getProperty("os.name") %>
</body>
</html>
The error looks like:
HTTP Status 500 – Internal Server Error
Type Exception Report
Message Unable to compile class for JSP:
Description The server encountered an unexpected condition that
prevented it from fulfilling the request.
Exception
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: [5] in the jsp file: [/index.jsp]
System cannot be resolved
2: <!DOCTYPE html>
3: <html>
4: <body>
5: <%= System.getProperty("os.name") %>
6: </body>
7: </html>
We've found that replacing the ECL Jar bundled with Tomcat 8.5.71
(ecj-4.6.3.jar) with the version from Tomcat 9.0.53 (ecj-4.20.jar) fixes the
issue.
We've tested this occurs with JDKs from multiple vendors including Adoptium,
Oracle (from jdk.java.net) and Azul.
Kind regards,
-- Denis
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