Tomcat manager/html is not available?

问题:

Hi I just installed Tomcat and and am trying to get it up and running however whenever I try to navigate to manager/html it gives me this error "The requested resource (/manager/html) is not available".

The homepage, /docs, /examples all work fine and my logs show nothing. How do I fix this? I'm using Tomcat 6.0.20 and JDK 1.6.0_21 on Windows 7 64bit.

回答1:

You have to check if you have the folder with name manager inside the folder webapps in your tomcat.

Rubens-MacBook-Pro:tomcat rfanjul$ ls -la webapps/
total 16
drwxr-xr-x   8 rfanjul  staff   272 21 May 12:20 .
drwxr-xr-x  14 rfanjul  staff   476 21 May 12:22 ..
-rw-r--r--@  1 rfanjul  staff  6148 21 May 12:20 .DS_Store
drwxr-xr-x  19 rfanjul  staff   646 17 Feb 15:13 ROOT
drwxr-xr-x  51 rfanjul  staff  1734 17 Feb 15:13 docs
drwxr-xr-x   6 rfanjul  staff   204 17 Feb 15:13 examples
drwxr-xr-x   7 rfanjul  staff   238 17 Feb 15:13 host-manager
drwxr-xr-x   8 rfanjul  staff   272 17 Feb 15:13 manager

After that you will be sure that you have this permmint for you user in the file conf/tomcat-users.xml:

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

restart tomcat and stat tomcat again.

sh bin/shutdown.sh 
sh bin/startup.sh

I hope that will works fine for you.

回答2:

You have to enable access first: Configuring Manager Application Access

回答3:

I had the situatuion when tomcat manager did not start. I had this exception in my logs/manager.DDD-MM-YY.log:

org.apache.catalina.core.StandardContext filterStart
SEVERE: Exception starting filter CSRF
java.lang.ClassNotFoundException: org.apache.catalina.filters.CsrfPreventionFilter
        at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
        ...

This exception was raised because I used a version of tomcat that hadn't CSRF prevention filter. Tomcat 6.0.24 doesn't have the CSRF prevention filter in it. The first version that has it is the 6.0.30 version (at least. according to the changelog). As a result, Tomcat Manager was uncompatible with version of Tomcat that I used. I've digged description of this issue here: http://blog.techstacks.com/.m/2009/05/tomcat-management-setting-up-tomcat/comments/

Steps to fix it:

1. Check version of tomcat installed by running "sh version.sh" from your tomcat/bin directory
2. Download corresponding version of tomcat
3. Stop tomcat
4. Remove your webapps/manager directory and copy manager application from distributive that you've downloaded.
5. Start tomcat

Now you should be able to access tomcat manager.

回答4:

My problem/solution is very embarrassing but who knows... perhaps it happened to someone else:

My solution: Turn off proxy

For the past two hours I've been wondering why my manager would not load. (the root was cached so it loaded). I had set the browser's proxy to proxy traffic to my house. :/

回答5:

I couldn't log in to the manager app, even though my tomcat-users.xml file was set up correctly. The problem was that tomcat was configured to get users from a database. An employee who knew how this all worked left the company so I had to track this all down.

If you have a web application with something like this in the projects web.xml:

<security-role>
    <role-name>manager</role-name>
</security-role>

You should be aware that this is using the same system for log ins as tomcat! So where ever your manager role user(s) are defined, that is where you should define your manager-gui role and user. In server.xml I found this:

 <Realm className="org.apache.catalina.realm.JDBCRealm"
    driverName="org.gjt.mm.mysql.Driver"
    connectionURL="jdbc:mysql://localhost/<DBName>?user=<DBUser>&amp;password=<DBPassword>"
    userTable="users" userNameCol="user_name" userCredCol="user_pass"
    userRoleTable="user_roles" roleNameCol="role_name" />

That tells me there is a database storing all the users and roles. This overrides the tomcat-users.xml file. Nothing in that file works unless this Realm is commented out. The solution is to add your tomcat user to the users table and your manager-gui role to the user_roles table:

insert into users (user_name, user_pass) values ('tomcat', '<changeMe>');
insert into user_roles (user_name, role_name) values ('tomcat', 'manager-gui');

You should also have a "manager-gui" rolename in the roles table. Add that if it doesn't exist. Hope this helps someone.

回答6:

Your website is blank because ROOT directory is missing from your ../webapps folder. Refer to tomcat documentation for the specific location on where it should be.

回答7:

In my case, the folder was _Manager. After I renamed it to Manager it worked.

Now, I see login popup and I enter credentials from conf/tomcat-users.xml, It all works fine.

回答8:

Once try by replacing localhost to your 'computer name' i.e, http://localhost:8080 to http://system09:8080