My goal is to create a web application using compojure and attach datomic as database. Individually, these two components work fine. However, when I try to start the server with
lein ring server-headless (including datomic as a dependency) with an enourmous error. The head of the error output:
Exception in thread "main" java.lang.NoClassDefFoundError: org/eclipse/jetty/util/component/AggregateLifeCycle, compiling:(ring/adapter/jetty.clj:1:1)
at clojure.lang.Compiler.load(Compiler.java:7391)
at clojure.lang.RT.loadResourceScript(RT.java:372)
at clojure.lang.RT.loadResourceScript(RT.java:363)
at clojure.lang.RT.load(RT.java:453)
at clojure.lang.RT.load(RT.java:419)
at clojure.core$load$fn__5677.invoke(core.clj:5893)
using the project.clj
(defproject pinvest "0.1.0-SNAPSHOT"
:description "foobar"
:min-lein-version "2.0.0"
:dependencies [[org.clojure/clojure "1.8.0"]
[org.clojure/core.async "0.3.442"]
[org.clojure/tools.namespace "0.2.11"]
[compojure "1.5.1"]
[ring/ring-defaults "0.2.1"]
[com.datomic/clj-client "0.8.606"]]
:plugins [[lein-ring "0.9.7"]]
:ring {:handler pinvest.handler/app}
:profiles
{:dev {:dependencies [[javax.servlet/servlet-api "2.5"]
[ring/ring-mock "0.3.0"]]}})
Initially generated with lein new compojure foo. The dependency com.datomic/clj-client is causing the problem in starting the server.
I tried excluding some dependencies, by making my project.clj with
[com.datomic/clj-client "0.8.606"
:exclusions [org.eclipse.jetty/jetty-http
org.eclipse.jetty/jetty-util
org.eclipse.jetty/jetty-client]]
but that just results in
clojure.lang.Compiler$CompilerException: java.lang.ClassNotFoundException: org.eclipse.jetty.client.HttpClient, compiling:(cognitect/http_client.clj:1:1)
Any help would be greatly appriciated.
PS. I'm a newbie to clojure, and these error messages are just impossible to understand
Try not to use jetty. Someone from the Slack group who came up with a very similar problem now uses this combination (http-kit in place of jetty):
[com.datomic/datomic-free "0.9.5544"] [ring/ring-core "1.5.0"] [http-kit "2.2.0"]
I ran into this issue too and could find no workaround. From what I understand it looks like ring-core is using an older jetty adapter for legacy purposes. I've found https://github.com/sunng87/ring-jetty9-adapter a worthy replacement as a ring dependancy so far with no further issues in my setup:
[com.datomic/clj-client "0.8.606" :exclusions [org.eclipse.jetty/jetty-http org.eclipse.jetty/jetty-util org.eclipse.jetty/jetty-client]]
[info.sunng/ring-jetty9-adapter "0.10.0"]
It's odd. The :exclusion worked for me(but I see it did not work for you). It's documented here
[com.datomic/client-pro "0.8.28"
:exclusions [org.eclipse.jetty/jetty-client
org.eclipse.jetty/jetty-http
org.eclipse.jetty/jetty-util]]
Related
I am trying my first run with ring and lein, and I am facing problems in getting it to run. I have taken this example from the book "Web development with Clojure", chapter 1, and also from https://quickleft.com/blog/your-first-clojure-web-app/ . The code from both these sites give me the same error - Class Not Found.
I have the following project.clj
(defproject myfirstwebapp "0.1.1"
:description "A hello world for a Ring based web app"
:dependencies [[org.clojure/clojure "1.8.0"]
[ring "1.4.0"]]
:plugins [[lein-ring "0.9.7"]]
:dev-dependencies [[lein-ring "0.9.7"]]
:ring {:handler myfirstwebapp.core/app})
And the following core.clj
(ns myfirstwebapp.core)
(defn app [req]
{:status 200
:headers {"content-Type" "text/html"}
:body "Hello World!"})
And the commands I ran were these:
lein new myfirstwebapp
edit project.clj as above
cd myfirstwebapp
lein deps
edit src/myfirstwebapp/core.clj as above
lein ring server
And now I am getting errors like:
Exception in thread "main" java.lang.ClassNotFoundException: leiningen.core.project$reduce_repo_step, compiling:(C:\Users\ROG\form-init7789757414629005682.clj:1:17608)
Is there some mismatch between the versions of different components that I am using? Or something else?
It is a bug in lein 2.6.0. Fixed in 2.6.1
What can cause lein uberjar to fail with "Caused by: java.lang.ClassNotFoundException" errors when lein run runs my app successfully? I'm using leiningen 2.5.1.
It looks like leiningen provides profiles as a way to make custom environments for certain tasks. However, I don't believe a profile difference between what is happening with lein run and lein uberjar is responsible because ...
1) I tried producing the uberjar with every possible profile, via lein with-profile <profile> for every <profile> named in the output of lein show-profiles.
2) I ran lein with-profile uberjar run, and no errors arose.
In case the answer to this problem and similar problems might be specific to the classes and dependencies involved, it is classes related to Overtone that produce the ClassNoteFoundException errors.
My project.clj file looks like:
(defproject cochlea "0.1.0-SNAPSHOT"
:description "An interactive ear training GUI application"
:url "http://github.com/seewalker/cochlea"
:license {:name "GPL v3"
:url "http://www.gnu.org/copyleft/gpl.html"}
:repositories {"conjars" "http://conjars.org/repo"}
:dependencies [[org.clojure/clojure "1.5.1"]
[overtone "0.9.1"]
[org.clojure/tools.trace "0.7.5"]
[org.clojure/java.jdbc "0.3.7"]
[postgresql "9.1-901.jdbc4"]
[environ "0.5.0"]
[incanter "1.9.0"]
[clj-time "0.9.0"]
[me.raynes/conch "0.8.0"]
[seesaw "1.4.2" :exclusions [org.clojure/clojure]]]
:profiles { :uberjar {:aot :all} }
:repl-options { :timeout 120000}
:main cochlea.core
:target-path "target/%s")
I can't figure out why I'm getting the following compile error after upgrading:
Compiling addr-verify.core
Exception in thread "main" java.lang.NoClassDefFoundError:
clojure/lang/ILookupHost, compiling:(core.clj:39:1)
at clojure.lang.Compiler$InvokeExpr.eval(Compiler.java:3463)
I am using leiningen 2.3.4, and am trying to upgrade an application to use Clojure 1.5.1 and some dependencies. This compiled fine with the old project.clj. But I want to use the Clojure 1.5.1. I'm just confused as to what is causing this.
These are the differences between the two project.clj versions.
< (defproject addr-verify "1.0.0-SNAPSHOT"
> (defproject addr-verify "1.0.1-SNAPSHOT"
< :dependencies [[org.clojure/clojure "1.2.1"]
< [org.clojure/clojure-contrib "1.2.0"]
< [clojure-csv/clojure-csv "1.2.4"]
< [org.clojure/tools.cli "0.1.0"]
< [clj-http "0.1.3"]]
< :main addr-verify.core)
> :dependencies [[org.clojure/clojure "1.5.1"]
> [clojure-csv/clojure-csv "2.0.1"]
> [org.clojure/tools.cli "0.3.1"]
> [clj-http "0.9.1"]]
> :omit-source true
> :main addr-verify.core
> :aot [addr-verify.core])
Run lein clean, if you haven't yet.
Sometimes compiled artifacts are created and reused, and this can cause problems when you have library version changes. lein clean clears out those artifacts.
ILookupHost was removed as of Clojure 1.3.0, so perhaps you have an old compilation artifact or compiled dependency.
The most recent version of Clojure is 1.6.0 - why not upgrade to there instead?
I'm not sure what the differences are, but I usually use org.clojure/data.csv as my CSV library. Might be worth looking into.
If you need help finding old contrib, see: http://dev.clojure.org/display/community/Where+Did+Clojure.Contrib+Go
I am seriously pulling my hair right now! I am a total noob at clojure: I can't seem to be able to get a simple clojurescript compilation done without this error:
ERROR: JSC_MISSING_PROVIDE_ERROR. required "clojure.core.async" namespace never provided at /home/jldupont/workspace/$someproject/target/cljsbuild-compiler-0/domain2/main.js line 4 : 0
I've got the following project.clj file:
(defproject $someproject "0.1"
:description "some project..."
:dependencies [[org.clojure/clojure "1.5.1"]
[org.clojure/clojurescript "0.0-2030"]
[org.clojure/core.async "0.1.267.0-0d7780-alpha"]
]
:plugins [[lein-cljsbuild "0.3.2"]]
:cljsbuild {
:builds [{:id "domain2"
:source-paths ["src/cljs/model2/domain"]
:compiler {:output-to "src/assets/js/model2/domain/domain2.js"
:optimizations :advanced
:pretty-print true}
}
]
}
)
Everytime I use lein cljsbuild auto I get the error quoted above.
Please help!
Update
I've looked in my ~/.m2 directory and the dependencies ( in this case core.async ) are present.
Update 2
It would appear that it is the Google Closure Compiler that spews out this error message. Not sure how to provide it a path to the dependencies...
As mentioned in my comment above: if you want to use core.async with ClojureScript you have to require the namespace cljs.core.async (instead of Clojure's clojure.core.async).
I would really like to use Korma for my project, but every time I try to test it in my REPL, it throws the following error:
core=> (require 'korma.db)
FileNotFoundException Could not locate clojure/java/jdbc/internal__init.class or clojure/java/jdbc/internal.clj on classpath: clojure.lang.RT.load (RT.java:432)
I have the following in my 'core' namespace:
(ns core
(:require [clojure.java.jdbc :as sql]))
and the following in my project.clj:
(defproject wknd "1.0.0-SNAPSHOT"
:description "weekend side project"
:dependencies [[org.clojure/clojure "1.4.0"]
[org.clojure/clojure-contrib "1.2.0"]
[org.xerial/sqlite-jdbc "3.7.2"]
[org.clojure/java.jdbc "0.2.2"]
[korma "0.3.0-beta9"]]
:dev-dependencies [[org.clojars.scott/lein-nailgun "1.1.0"]])
I am just starting out on clojure and have no idea why I'm getting this error. I've searched around and couldn't find similar issues elsewhere.
From the author:
Korma hadn't been upgraded to the latest JDBC since the reorganization
of it. Try beta11, should be fixed.
Cheers, Chris.
and this error disappeared for me.