I get a java.lang.NoSuchMethodError when running XSP. Whats wrong?
This happens because Cocoon needs a DOM Level 2 implementation and you probably have a DOM Level 1 included in your classpath before xerces.jar. So, place the xerces.jar archive that comes with Cocoon before all the other jar packages in your classpath. Some servlet engines, such as Tomcat, construct a CLASSPATH automatically based on all the jar files in a lib directory. In this case, you may need to rename the jar file containing the DOM Level 1 (xml.jar or parser.jar) to something like zzz.jar to force it to come last, or even move it out of the lib directory altogether. If even that doesn’t work, also check that there is no XML parser in your JDK’s lib/ext or jre/lib/ext directories. If there is, remove it. Unfortunately, some servlet engines require DOM Level 1 to be ahead of DOM Level 2 in the CLASSPATH – conflicting with Cocoon! There is no known workaround for this problem (but see the next question) – please let us know at cocoon-users@xml.apache.org if you find one.
