/tags/opengrok/ Recent content in Opengrok on Saleem Ansari Hugo -- gohugo.io en (c) 2024 Saleem Ansari Fri, 15 Oct 2010 00:00:00 +0000 /2010/10/15/resolving-java.lang.noclassdeffounderror-java_cup/runtime/lr_parser/ Fri, 15 Oct 2010 00:00:00 +0000 /2010/10/15/resolving-java.lang.noclassdeffounderror-java_cup/runtime/lr_parser/ While building {OpenGrok from source I came across a common error. {OpenGrok also needs JFlex to be present on the classpath as mentioned in the README.TXT file. $ sudo yum install jflex $ hg clone ssh://anon@hg.opensolaris.org/hg/opengrok/trunk/ opengrok-dev $ cd opengrok-dev $ CLASSPATH=$CLASSPATH:/usr/share/java/JFlex.jar Compilation failed giving the following error. BUILD FAILED java.lang.NoClassDefFoundError: java_cup/runtime/lr_parser at JFlex.anttask.JFlexTask.execute(JFlexTask.java:71) at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288) at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) at org.apache.tools.ant.Task.perform(Task.java:348) at org.apache.tools.ant.Target.execute(Target.java:357) I couldn’t locate the cause of this error and after struggling a lot, the solution was pretty simple.