https://issues.apache.org/bugzilla/show_bug.cgi?id=49986
Summary: Double-check locking. Possible data-race in
JspServletWrapper
Product: Tomcat 6
Version: 6.0.29
Platform: PC
Status: NEW
Severity: normal
Priority: P2
Component: Jasper
AssignedTo: dev@tomcat.apache.org
ReportedBy: sergeyvorob...@google.com
r998053
http://svn.apache.org/repos/asf/tomcat/tc6.0.x/trunk/java/org/apache/jasper/servlet/JspServletWrapper.java
Common anti-pattern: Double checked locking. I don't know is this race
dangerous or no.
Race on private boolean reload
public Servlet getServlet()
throws ServletException, IOException, FileNotFoundException
{
if (reload) {
synchronized (this) {
// Synchronizing on jsw enables simultaneous loading
// of different pages, but not the same page.
if (reload) {
// This is to maintain the original protocol.
..........
theServlet = servlet;
reload = false;
}
}
}
return theServlet;
}
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