ubuntu - Clojure program can't complete after running -


my problem unexpected situation executing clojure program.

i use ubuntu 14.04 x64, lein , clojure(both last versions). i've finished little project(web crawler, learning clojure). works, i'm sure('cos i've run in repl).

ok, i'm trying run lein in terminal (look @ screenshot). works correct, prints elapsed time. then, it's waiting something. that's problem. program can't stop , can't give contol ubuntu's terminal. i've faced first time, projects before complited itself. way "ctrl + c". in code, use "imperative" commands(doseq, do), file i/o (with-open reader/writer), agents(send-off, await) , "clj-http.client" downloading webpages. potential causes.

here's "main":

(defn crawl-bunch [depth]   (do     (send-off urls visit-urls)     (await urls)     (renew-urls)     (await urls)     (send-off urls mark-used-urls)     (await urls)     (dec depth)))  (defn crawl [depth]   (loop [i depth]     (if (= 0)       (save-found-urls "out_urls.txt")       (recur (crawl-bunch i)))))  (defn -main [& args]   (time     (do     (file-to-urls "urls.txt")     (crawl 1))))

here's full source code - 100 strings (/src/crawler/core.clj): https://github.com/ivanpetrov16130/crawler

tell me please, how fix it? thank you answers , excuse me grammatical, syntax , logical errors.

image full of sorrow."

you need run shutdown-agents in order thread pools used agents shut down.


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