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I've just installed Tomcat on CentOS 6.3.
# yum install tomcat6
# service tomcat6 start
According to the tutorials I've looked at, I should be able to see a test page now.
# curl -I 127.0.0.1:8080
HTTP/1.1 400 Bad Request
...
# curl -I 127.0.0.1:8080/manager/html
HTTP/1.1 400 Bad Request
...
Why am I getting 400 here? Is there something else that I need to configure?
Tomcat always returns status code 400
Because the webapps directory is empty:
# ls -l /usr/share/tomcat6/webapps/
total 0
https://issues.apache.org/bugzilla/show_bug.cgi?id=50734
Either create a dummy ROOT context to get a 404 status:
# mkdir /usr/share/tomcat6/webapps/ROOT
# ls -l /usr/share/tomcat6/webapps/
total 4
drwxr-xr-x 2 root root 4096 Feb 22 07:47 ROOT
# service tomcat6 restart
Stopping tomcat6: [ OK ]
Starting tomcat6: [ OK ]
# curl -I localhost:8080
HTTP/1.1 404 Not Found
Server: Apache-Coyote/1.1
Content-Type: text/html;charset=utf-8
Content-Length: 955
Date: Fri, 22 Feb 2013 06:48:06 GMT
or... install the tomcat6-webapps package to get a 200:
yum info tomcat6-webapps
Name : tomcat6-webapps
Arch : noarch
Version : 6.0.24
Release : 48.el6_3
Size : 609 k
Repo : updates
Summary : The ROOT and examples web applications for Apache Tomcat
URL : http://tomcat.apache.org/
License : ASL 2.0
Description : The ROOT and examples web applications for Apache Tomcat.
tree -L 2 /usr/share/tomcat6/webapps/
/usr/share/tomcat6/webapps/
├── examples
│ ├── index.html
│ ├── jsp
│ ├── servlets
│ └── WEB-INF
├── ROOT
│ ├── asf-logo-wide.gif
│ ├── build.xml
│ ├── favicon.ico
│ ├── index.html
│ ├── index.jsp
│ ├── RELEASE-NOTES.txt
│ ├── tomcat.gif
│ ├── tomcat-power.gif
│ ├── tomcat.svg
│ └── WEB-INF
└── sample
├── hello.jsp
├── images
├── index.html
├── META-INF
└── WEB-INF
10 directories, 12 files
curl -I localhost:8080
HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
Accept-Ranges: bytes
ETag: W/"7777-1357565143000"
Last-Modified: Mon, 07 Jan 2013 13:25:43 GMT
Content-Type: text/html
Content-Length: 7777
Date: Fri, 22 Feb 2013 06:52:04 GMT
If you're seeing this error, but you're in an environment where other webapps already exist, you can simply create a ROOT directory, then create a zero byte index.html inside of it. A 200 will be readily returned upon successful curl.
