“[Fatal Error] :1:120: The processing instruction target matching ”[xX][mM][lL]“ is not allowed.” [duplicate]

Answer 1

I recently was working on a Spring MVC startup project sample where I used maven built tool. When I run my server using jetty I got this processing instruction error and I found that my web.xml was having an extra tag before the tag and it started with the tag instead.

So I removed the below tag which was the start tag,

and had the below tag,

as the start tag of my web.xml and it solved my issue.

Note: Please ensure there is no comments, tags, free spaces or any unwanted characters left before the tag. This will mainly throw these type of error while parsing the xml files.