https://bz.apache.org/bugzilla/show_bug.cgi?id=66292
Bug ID: 66292
Summary: JSP static include broken
Product: Tomcat 9
Version: 9.0.67
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Jasper
Assignee: dev@tomcat.apache.org
Reporter: san...@buskens.org
Target Milestone: -----
Created attachment 38400
--> https://bz.apache.org/bugzilla/attachment.cgi?id=38400&action=edit
Webapp with demonstration of static include compile error
Some of our JSP pages with static includes which worked on Tomcat 9.0.65 broke
on Tomcat 9.0.67.
The behaviour manifests itself when you static include a JSP page from a
subdirectory and then include a JSP from the base directory, like so:
index.jsp contains 2 static includes to:
subdir/subdir_include.jsp <-- this one works
another_include.jsp <-- this one doesn't
Having debugged the code the problem appears to be in the
PageController.baseDirStack which looks differently after the
subdir/subdir_include.jsp has been processed and the baseDirStack has been
popped in PageController.doParse, in 9.0.65 the baseDirStack is defined as a
Stack:
private final Stack<String> baseDirStack = new Stack<>();
and popped near the end of doParse as
baseDirStack.pop();
In Tomcat 9.0.67 this has now become a:
private final Queue<String> baseDirStack = new ArrayDeque<>();
and it is popped near the end of doParse as:
baseDirStack.remove();
On 9.0.67 this returns the wrong baseDir causing the another_include.jsp to not
be found.
I have included a test which demonstrates the difference in behaviour of the
Stack.pop() and ArrayDeque.remove() and also a simplistic webapp to demonstrate
the JSP compilation failure on 9.0.67.
We stumbled on this problem on openjdk 11.0.16.1 but were able to also
reproduce it on jdk8.
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