lein ring server在docker容器内抛出java.io.FileNotFoundException

时间：2017-11-09 13:23:08

标签： docker clojure leiningen ring

我在码头工程中容纳了我的clojure项目。容器已成功构建，并且运行了java 1.8.0_151和lein 2.8.1。但是，当我尝试启动一个响铃服务器时，我得到了这个例外。然而，当我在mac环境中运行相同的代码时，一切都正常运行。

例外：

$ docker-compose up
Starting clojurejournal_clojure_journal_1 ...
Starting clojurejournal_clojure_journal_1 ... done
Attaching to clojurejournal_clojure_journal_1
clojure_journal_1  | --> INFO: starting lein ring server
clojure_journal_1  | Nov 09, 2017 12:16:18 PM com.mchange.v2.log.MLog <clinit>
clojure_journal_1  | INFO: MLog clients using java 1.4+ standard logging.
clojure_journal_1  | 2017-11-09 12:16:20.027:INFO:oejs.Server:jetty-7.6.1.v20120215
clojure_journal_1  | 2017-11-09 12:16:20.084:INFO:oejs.AbstractConnector:Started SelectChannelConnector@0.0.0.0:3000
clojure_journal_1  | Started server on port 3000
clojure_journal_1  | Exception in thread "main" java.io.FileNotFoundException: http://localhost:3000, compiling:(/tmp/form-init462348242831821276.clj:1:71)
clojure_journal_1  |    at clojure.lang.Compiler.load(Compiler.java:7142)
clojure_journal_1  |    at clojure.lang.Compiler.loadFile(Compiler.java:7086)
clojure_journal_1  |    at clojure.main$load_script.invoke(main.clj:274)
clojure_journal_1  |    at clojure.main$init_opt.invoke(main.clj:279)
clojure_journal_1  |    at clojure.main$initialize.invoke(main.clj:307)
clojure_journal_1  |    at clojure.main$null_opt.invoke(main.clj:342)
clojure_journal_1  |    at clojure.main$main.doInvoke(main.clj:420)
clojure_journal_1  |    at clojure.lang.RestFn.invoke(RestFn.java:421)
clojure_journal_1  |    at clojure.lang.Var.invoke(Var.java:383)
clojure_journal_1  |    at clojure.lang.AFn.applyToHelper(AFn.java:156)
clojure_journal_1  |    at clojure.lang.Var.applyTo(Var.java:700)
clojure_journal_1  |    at clojure.main.main(main.java:37)
clojure_journal_1  | Caused by: java.io.FileNotFoundException: http://localhost:3000
clojure_journal_1  |    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
clojure_journal_1  |    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
clojure_journal_1  |    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
clojure_journal_1  |    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
clojure_journal_1  |    at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1944)
clojure_journal_1  |    at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1939)
clojure_journal_1  |    at java.security.AccessController.doPrivileged(Native Method)
clojure_journal_1  |    at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1938)
clojure_journal_1  |    at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1508)
clojure_journal_1  |    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
clojure_journal_1  |    at javax.swing.JEditorPane.getStream(JEditorPane.java:768)
clojure_journal_1  |    at javax.swing.JEditorPane.setPage(JEditorPane.java:432)
clojure_journal_1  |    at javax.swing.JEditorPane.setPage(JEditorPane.java:880)
clojure_journal_1  |    at javax.swing.JEditorPane.<init>(JEditorPane.java:274)
clojure_journal_1  |    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
clojure_journal_1  |    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
clojure_journal_1  |    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
clojure_journal_1  |    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
clojure_journal_1  |    at clojure.lang.Reflector.invokeConstructor(Reflector.java:180)
clojure_journal_1  |    at clojure.java.browse_ui$open_url_in_swing.invoke(browse_ui.clj:15)
clojure_journal_1  |    at clojure.lang.Var.invoke(Var.java:379)
clojure_journal_1  |    at clojure.java.browse$open_url_in_swing.invoke(browse.clj:64)
clojure_journal_1  |    at clojure.java.browse$browse_url.invoke(browse.clj:76)
clojure_journal_1  |    at ring.server.standalone$open_browser_to.invoke(standalone.clj:39)
clojure_journal_1  |    at ring.server.standalone$serve$fn__1676.invoke(standalone.clj:102)
clojure_journal_1  |    at ring.server.standalone$try_port.invoke(standalone.clj:16)
clojure_journal_1  |    at ring.server.standalone$serve.doInvoke(standalone.clj:95)
clojure_journal_1  |    at clojure.lang.RestFn.invoke(RestFn.java:423)
clojure_journal_1  |    at ring.server.leiningen$serve.invoke(leiningen.clj:20)
clojure_journal_1  |    at user$eval3389.invoke(form-init462348242831821276.clj:1)
clojure_journal_1  |    at clojure.lang.Compiler.eval(Compiler.java:6703)
clojure_journal_1  |    at clojure.lang.Compiler.eval(Compiler.java:6693)
clojure_journal_1  |    at clojure.lang.Compiler.load(Compiler.java:7130)
clojure_journal_1  |    ... 11 more
clojure_journal_1  | Caused by: java.io.FileNotFoundException: http://localhost:3000
clojure_journal_1  |    at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1890)
clojure_journal_1  |    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
clojure_journal_1  |    at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480)
clojure_journal_1  |    at javax.swing.JEditorPane.getStream(JEditorPane.java:733)
clojure_journal_1  |    ... 33 more

dockerfile：

FROM ubuntu:xenial

LABEL maintainer=freid
ENV WORK_DIR /var/www

# install dependancies
RUN apt-get update
RUN apt-get install -y default-jre curl wget

RUN wget https://raw.githubusercontent.com/technomancy/leiningen/stable/bin/lein
RUN chmod +x lein
RUN mv lein /usr/local/bin

# copy to /var/www
COPY . $WORK_DIR

# make it a working directory
WORKDIR $WORK_DIR

# fix permissions
RUN chmod a+x /var/www/entrypoint.sh

# expose port 3000
EXPOSE 3000

# make entrypoint
ENTRYPOINT ["/bin/sh", "/var/www/entrypoint.sh"]

搬运工-撰写：

clojure_journal:
  image: clojure_journal:latest
  command: run
  ports:
    - 3000:3000
  volumes:
    - .:/opt/clojure_journal

entrypoint.sh 

#!/usr/bin/env bash

start(){
    echo "--> INFO: starting lein ring server"
    lein ring server
}

case $1 in

run)
    shift 1
    start $@
;;

*)
   >&2 echo "---> INFO: running: '$1'."
;;
esac

2 个答案:

答案 0 :(得分：1)

根据@Taylor Wood使用lein ring server-headless的评论解决了这个问题。

答案 1 :(得分：1)

查看异常堆栈跟踪，看起来您的代码在启动期间尝试打开浏览器http://localhost:3000，这可能不是您想要的容器内容。我假设您只想从容器中运行HTTP服务器。在entrypoint.sh脚本中尝试lein ring server-headless，这将阻止它尝试打开浏览器

顺便说一句，也可以（并且很容易）lein uberjar您的项目并将独立的JAR复制到您的容器中并使用java运行它，假设您没有使用Docker镜像开发环境。这样你就不需要安装Leiningen了，这意味着你可以使用OpenJDK image并且你的Dockerfile可以更加简单：

FROM java:8-alpine    
ADD path/to/your.jar /your-app/app.jar
EXPOSE 3000 
CMD ["java", "-jar", "/your-app/app.jar"]
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