
HTTP Status 404 -
type Status report
message
description The requested resource () is not available. Apache Tomcat/5.5.31
how to rectify the above error

It seems that the server is unable to find your jsp or servlet file. Either you have specified wrong path to run a jsp or servlet or may be you have saved the file with different name.
If you are running a servlet, servlet mapping is essential. Check it.
If you are facing any programming issue, such as compilation errors or not able to find the code you are looking for.
Ask your questions, our development team will try to give answers to your questions.