Accessing Tomcat manager throws 404

I am using Tomcat 7.0.65.

Here is my tomcat-users.xml:

<role rolename="manager"/>
<role rolename="manager-gui"/>
<role rolename="manager-script"/>
<role rolename="manager-status"/>
<user username="admin" password="tomcat" roles="manager,manager-gui,manager-script,manager-status"/>

Here is the server realm snippet in server.xml

<Realm className="org.apache.catalina.realm.MemoryRealm" />

I can access the below URLs : (It asks for the credentials for the first time)

http://localhost:8080/manager/status
http://localhost:8080/manager/status/all

But accessing any of the URLs:

http://localhost:8080/manager/text/sessions?path=/examples
http://localhost:8080/manager/text/serverinfo

fails with "404 Not found". Below is the displayed error message:

The page you tried to access (/manager/text/sessions) does not exist.

The Manager application has been re-structured for Tomcat 7 onwards and some of URLs have changed. All URLs used to access the Manager application should now start with one of the following options:

/manager/html for the HTML GUI
/manager/text for the text interface
/manager/jmxproxy for the JMX proxy
/manager/status for the status pages
Note that the URL for the text interface has changed from "/manager" to "/manager/text".

You probably need to adjust the URL you are using to access the Manager application. However, there is always a chance you have found a bug in the Manager application. If you are sure you have found a bug, and that the bug has not already been reported, please report it to the Apache Tomcat team.

Note that I am accessing the URL as /manager/text. Even curl fails with the same error.

Am I missing any configuration?

Solution

After much debugging, I found the real cause was the ManagerServlet was failing to get instantiated with the below security exception:

java.lang.SecurityException: Restricted (ContainerServlet) class org.apache.catalina.manager.ManagerServlet

The way to fix is to set privileged="true" in the Context section in ${TOMCAT_INSTALL_DIR}/conf/context.xml

<!-- The contents of this file will be loaded for each web application -->
<Context privileged="true">

    <!-- Default set of monitored resources. If one of these changes, the    -->
    <!-- web application will be reloaded.