https://bz.apache.org/bugzilla/show_bug.cgi?id=57733
Bug ID: 57733
Summary: ServletContext.getContext(String) always returns null
for the root context ("/")
Product: Tomcat 8
Version: 8.0.20
Hardware: PC
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
Assignee: [email protected]
Reporter: [email protected]
The cause of the problem is the fix for bug #57190 for version 8.0.16
(https://bz.apache.org/bugzilla/show_bug.cgi?id=57190)
It is not present in version 8.0.15
I have the following configuration running on Tomcat 8.0.20:
C:\tomcat
conf
server.xml
context.xml
webapps
app
......
C:\external
app3
web
app4
web
In context.xml I have <Context crossContext="true"> .... </Context>
And in server.xml:
..........
<Host name="host.com" appBase="webapps" unpackWARs="true" autoDeploy="true">
<Context
docBase="C:\external\app3\web"
path=""
crossContext="true"
reloadable="true" />
<Context
crossContext="true"
docBase="C:\external\app4\web"
path="/app4"
reloadable="true" />
</Host>
Obtaining the Context of /app works as espected:
request.getServletContext().getContext("/app") is not null.
However, requesting the Context of the root app (app3) with:
request.getServletContext().getContext("/") ALWAYS returns null.
After some debugging found out that this is a regression caused by the fix for
#57190 in org.apache.catalina.core.ApplicationContext#getContext(String)
http://grepcode.com/file/repo1.maven.org/maven2/org.apache.tomcat/tomcat-catalina/8.0.17/org/apache/catalina/core/ApplicationContext.java#286
on line 286 we have
284 // Must be an exact match. It is no good returning the ROOT
285 // context if the caller is looking for "/something-else"
286 if (mappingData.context.getPath().equals(uri)) {
287 child = mappingData.context;
288 }
Here uri is "/" and mappingData.context.getPath() is "" hence the null result.
Probably it should be:
String contextPath = mappingData.context.getPath();
if (contextPath.equals(uri) || contextPath.isEmpty() && uri.equals("/")) {
....
}
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