Maybe someone can tell me where I went wrong on this one. I have an app. Written with Clojure 1.4.
At first the app was very small, so I put all the code into core.clj. When I got to about 500 or 600 lines of code, core.clj was too big, so I started to break it up. There were some string-to-enlive-node functions that I moved to a file I called transform_strings_and_nodes.clj. The app keeps the most recent 15 minutes worth of session info in memory, then saves it to the database. Eventually, when this is live, tourists will arrive and interact with a kiosk and choose an itinerary. The itinerary is bulky, a lot of HTML strings held in memory. I began to wonder how bulky this might get. I thought I would write a profile function, relying on Timbre https://github.com/ptaoussanis/timbre. During development, I would have this function run in a thread and call itself every 5 minutes. I decided I would hit the app with a lot of dummy data, and the profile function would do stuff like time how long it took to transform all the HTML strings in memory into Enlive nodes. This was working for awhile. I am not sure what changed, but now I am getting: Exception in thread "Thread-4" java.lang.NoClassDefFoundError: kiosks_clojure/transform_strings_and_nodes $join_all_tourist_itineraries_together$fn__115 at kiosks_clojure.transform_strings_and_nodes $join_all_tourist_itineraries_together.invoke(transform_strings_and_nodes.clj: 84) at kiosks_clojure.transform_strings_and_nodes $render_html_string_to_enlive_nodes.invoke(transform_strings_and_nodes.clj: 94) at kiosks_clojure.transform_strings_and_nodes $prepare_render_html_string_to_enlive_nodes.invoke(transform_strings_and_nodes.clj: 101) at kiosks_clojure.transform_strings_and_nodes $profile_render_html_string_to_enlive_nodes.invoke(transform_strings_and_nodes.clj: 105) at clojure.lang.AFn.run(AFn.java:24) at java.lang.Thread.run(Thread.java:722) Caused by: java.lang.ClassNotFoundException: kiosks_clojure.transform_strings_and_nodes $join_all_tourist_itineraries_together$fn__115 at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:423) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java: 308) at java.lang.ClassLoader.loadClass(ClassLoader.java:356) As far as I can read the stack trace, the exception seems to get triggered here: (defn join-all-tourist-itineraries-together [sessions] (reduce (fn [vector-of-tourist-itineraries-as-strings next-tourist-session] (conj vector-of-tourist-itineraries-as-strings (get-in next- tourist-session [:itinerary-as-string]))) [] sessions)) Which is called from here: (defn render-html-string-to-enlive-nodes [] "2013-01-24 - I worry about how slow this might get when the memory is full of intineraries. I'm going to run these tests while this in development, to get a sense for what kind of performance we might get." (let [sessions (:sessions @um/interactions) accumulated-total-of-all-tourist-itineraries-in-memory-as- strings (st/join (join-all-tourist-itineraries-together sessions)) length-of-string-to-be-rendered (.length (str accumulated- total-of-all-tourist-itineraries-in-memory-as-strings)) itineraries-as-one-string-wrapped-in-div (apply str "<div id='all-itineraries'>" accumulated-total-of-all-tourist-itineraries-in- memory-as-strings "</div>")] (println (apply str "In render-html-string-to-enlive-nodes, the length of the HTML string: " length-of-string-to-be-rendered)) (transform-html-string-to-enlive-nodes itineraries-as-one-string- wrapped-in-div (keyword "#all-itineraries")))) (defn prepare-render-html-string-to-enlive-nodes [] (p :string-to-enlive-nodes (render-html-string-to-enlive-nodes))) (defn profile-render-html-string-to-enlive-nodes [] (. java.lang.Thread sleep 300000) (profile :debug :summary-render-html-strings-to-enlive-nodes (prepare-render-html-string-to-enlive-nodes))) I looked for info about this error and I found this: http://javarevisited.blogspot.com/2011/06/noclassdeffounderror-exception-in.html which says: "NoClassDefFoundError in Java comes when Java Virtual Machine is not able to find a particular class at runtime which was available during compile time. " I am very ignorant of the JVM and I do not understand how this can happen. Right now, while testing this app, I am compiling it locally on my Macintosh and I am running it locally on my Macintosh. How can a class be present at compile time but not at runtime? -- -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
