If you try to run a web application under Jetty that uses JSP it will throw the following exception (full stacktrace included as an attachment).

Caused by: org.xml.sax.SAXException: PWC6181: File /javax/servlet/jsp/resources/web-jsptaglibrary_1_2.dtd not found


It appears as though the file

/javax/servlet/jsp/resources/web-jsptaglibrary_1_2.dtd

is contained in the /usr/share/java/jetty-schemas/jetty-schemas.jar

which is provided by the jetty-schemas RPM.

But if you install the jetty-schemas RPM it still won't work because the jetty-schemas.jar is not in the jetty jsp classpath when jetty starts.

There would appear to be two omissions:

1. the jetty-schemas RPM should use build-jar-repository to install a link to the jar in ${jetty.home}/lib/jsp

2. the jetty package should have a Requires: jetty-schemas

I'm not sure of the history here but it appears that the web-jsptaglibrary_1_2.dtd file was originally in the jetty-runner jar provided in the jetty distribution. But recently (April 2014) the jetty-runner subpackage was removed in jetty-9.0.5-3. About 5 months earlier the jetty-schemas package was introduced. I presume jetty-schemas was meant to supersede jetty-runner. It also appears the upstream jetty 9.0 default loading includes the jetty-schemas jar. So I'm not exactly sure what is happening with our packaging with respect to upstream but all I know is that after installing jetty-schemas and making a link to it in ${jetty.home}/lib/jsp the problem went away, not sure if this is the preferred or correct solution, if not please advise.