问题
I have just downloaded Leiningen but I cannot manage to run it. After downloading its own Jar archive, the script fails with a java error. By running bash -x lein I can see that it hangs at this line:
+ exec java -Xbootclasspath/a:/home/andrea/.m2/repository/org/clojure/clojure/1.2.1/clojure-1.2.1.jar -client -Dleiningen.original.pwd=/home/andrea/bin -cp /home/andrea/.clojure/clojure.jar:::::test/:src/:resources/:/home/andrea/.lein/self-installs/leiningen-1.6.2-standalone.jar clojure.main -e '(use '\''leiningen.core)(-main)' /dev/null
Which produces:
Exception in thread "main" java.lang.RuntimeException: java.lang.NoSuchMethodError: clojure.lang.KeywordLookupSite.<init>(ILclojure/lang/Keyword;)V
at clojure.lang.Util.runtimeException(Util.java:165)
at clojure.lang.Compiler.eval(Compiler.java:6476)
at clojure.lang.Compiler.eval(Compiler.java:6431)
at clojure.core$eval.invoke(core.clj:2795)
at clojure.main$eval_opt.invoke(main.clj:296)
Interestingly, what fails is not the Java call, but the snippet '(use '\''leiningen.core)(-main)'. Running that line without it fires in fact a working clojure REPL. The leiningen-1.6.2-standalone.jar seem to be in the right path. Any ideas? I am new to both Java and Clojure...
回答1:
According the the reference [1], you need to add Clojure home to the classpath.
echo "export CLOJURE_HOME=$HOME/Opt/clojure
export CLASSPATH=$CLASSPATH:$CLOJURE_HOME" >> $HOME/.profile
[1] http://myminutes.wordpress.com/2011/12/01/clojure-lein-gives-error-exception-in-thread-main-java-lang-runtimeexception-java-lang-nosuchmethoderror-clojure-lang-keywordlookupsite/
回答2:
Chui Tey's answer points in the right direction. If, however, you don't have a stand-alone Clojure installation, but instead solely use Leiningen to bootstrap your projects, you should instead add the Leiningen standalone JAR to the classpath.
Thus:
export CLASSPATH="$CLASSPATH:$HOME/.lein/self-installs/leiningen-VERSION-standalone.jar"
来源：https://stackoverflow.com/questions/8439589/java-lang-nosuchmethoderror-clojure-lang-keywordlookupsite-when-running-leining