https://bz.apache.org/bugzilla/show_bug.cgi?id=61604
Bug ID: 61604
Summary: IllegalStateException in SmapStratum on empty JSP
Product: Tomcat 9
Version: 9.0.1
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P2
Component: Jasper
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: -----
We use a JSP that is included at several points to inject data into pages. At
the moment the whole content is commented out.
Tomcat 8.5 (production environment) ignores that page, respectively generates
no output as expected. Tomcat 9.0.1 (development environment) throws an
IllegalstateException. This is caused by a change in SmapStratum, which
previously returned null on getString() if lineData was null, now it throws an
unhandled exception.
Reproduction:
Create an "empty" JSP or one containing only JSP comments and using
trimDirectiveWhitespaces="true":
<%@ page pageEncoding="UTF-8" contentType="text/html; charset=utf-8"
language="java" import="java.util.Vector" errorPage=""
trimDirectiveWhitespaces="true" %>
<%-- This is a comment --%>
Result:
java.lang.IllegalStateException
at
org.apache.jasper.compiler.SmapStratum.getSmapStringInternal(SmapStratum.java:318)
at
org.apache.jasper.compiler.SmapStratum.getSmapString(SmapStratum.java:304)
at org.apache.jasper.compiler.SmapUtil.installSmap(SmapUtil.java:145)
at
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:473)
[...]
Expected result:
an empty page
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