ADT always fails to be installed-the ADT can be successfully installed through eclipse, but the ADT cannot be seen in the about dialog box, but the ddms and HV can be seen. You can see that the ADT file has been installed and the "installed" error will be returned when you reinstall the ADT ".
Reference http://forums.fedoraforum.org/showthread.php? T = 254296, problem solving
The following is taken from the preceding webpage:
OK I resolved the problem. Seems like I messed up when I uninstalled something tomcat5 some package. (which has a softlink to the JAR file causing problem)
I went to/usr/lib64/Eclipse/plugins and
Lrwxrwxrwx. 1 Root 39 Nov 12 08:03 javax. servlet. jsp_2.0.0.v20080601_07.jar->/usr/share/Java/tomcat5-jsp-2.0-api.jar
When I do
'Vim javax. servlet. jsp_2.0.0.v20080601_07.jar'
It was "unreadable", basically that's why it was stopping at this jar and whole installation fails.
Sudo Yum install tomcat5-servlet-2.4-api-javadoc.noarch tomcat5-jasper-eclipse.noarch tomcat5-servlet-2.4-api.noarch jakarta-commons-collections-tomcat5.x86_64 tomcat5-jasper-javadoc.noarch tomcat5-jasper.noarch tomcat5-jsp-2.0-api-javadoc.noarch tomcat5.noarch tomcat5-servlet-2.4-api-javadoc.noarch tomcat5-admin-webapps.noarch tomcat5-common-lib.noarch tomcat5-jasper-eclipse.noarch tomcat5-jsp-2.0-api.noarch tomcat5-server-lib.noarch
"Maybe some Tomcat * packages here are unnceccessary", but now I get over this!