Cannot connect to REPL without tools.jar explicitly on the classpath (java.lang.ClassNotFoundException: com.sun.javadoc.ClassDoc)

[jarohen]

Expected behavior

Able to connect to REPL

Actual behavior

cider-connect times out, NPE raised:

2018-02-12 10:30:44,969 [clojure-agent-send-off-pool-3] ERROR clojure.tools.nrepl.server - Unhandled REPL handler exception processing message {:op describe, :session 73a6492b-c5ce-42e0-9b8e-6905c68f2d9c, :id 10}
java.lang.NullPointerException: null
core.clj:2292 clojure.core/deref-future
core.clj:2312 clojure.core/deref
core.clj:2298 clojure.core/deref
nrepl.clj:90 cider.nrepl/wrap-pprint-fn[fn]
middleware.clj:22 clojure.tools.nrepl.middleware/wrap-conj-descriptor[fn]
session.clj:192 clojure.tools.nrepl.middleware.session/session[fn]
middleware.clj:22 clojure.tools.nrepl.middleware/wrap-conj-descriptor[fn]
nrepl.clj:354 cider.nrepl/wrap-spec[fn]
middleware.clj:22 clojure.tools.nrepl.middleware/wrap-conj-descriptor[fn]
middleware.clj:159 refactor-nrepl.middleware/wrap-refactor[fn]
middleware.clj:22 clojure.tools.nrepl.middleware/wrap-conj-descriptor[fn]
server.clj:19 clojure.tools.nrepl.server/handle*
server.clj:16 clojure.tools.nrepl.server/handle*
server.clj:28 clojure.tools.nrepl.server/handle[fn]
core.clj:2022 clojure.core/binding-conveyor-fn[fn]
AFn.java:18 clojure.lang.AFn.call
FutureTask.java:266 java.util.concurrent.FutureTask.run
ThreadPoolExecutor.java:1149 java.util.concurrent.ThreadPoolExecutor.runWorker
ThreadPoolExecutor.java:624 java.util.concurrent.ThreadPoolExecutor$Worker.run
Thread.java:748 java.lang.Thread.run

Steps to reproduce the problem

Running my application with java -cp my-uberjar.jar clojure.main, then using the following to start an embedded REPL:

(clojure.tools.nrepl.server/start-server :bind "localhost"
                                         :port 7888
                                         :handler (-> cider.nrepl/cider-nrepl-handler
                                                      refactor-nrepl.middleware/wrap-refactor))

Digging into it further, requiring cider.nrepl.middleware.util.java.parser seems sufficient to reproduce the issue - fails with java.lang.ClassNotFoundException: com.sun.javadoc.ClassDoc. Workaround is to ensure that $JAVA_HOME/lib/tools.jar is present on the classpath.

Environment & Version information

cider-nrepl version

0.16.0

Java version

1.8.0_161, x64

Operating system

Ubuntu

[jarohen]

Ah, I suspect this is a dupe of #447, although seems like the ClassNotFoundError might be something different. Feel free to close :)

[jarohen]

closing as a dupe