Docker Container error when i run docker Run

Question

i created a docker container for a simple java application .

creation of Docker image is correctely done . when i run docker run i have some problem related to java , but the application work well when i run it using IntelliJ.

docker Errors :

PS C:\Windows\system32> docker run testing Error: A JNI error has occurred, please check your installation and try again Exception in thread "main" java.lang.NoClassDefFoundError: javax/jms/JMSException at java.lang.Class.getDeclaredMethods0(Native Method) at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) at java.lang.Class.privateGetMethodRecursive(Class.java:3048) at java.lang.Class.getMethod0(Class.java:3018) at java.lang.Class.getMethod(Class.java:1784) at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544) at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526) Caused by: java.lang.ClassNotFoundException: javax.jms.JMSException at java.net.URLClassLoader.findClass(URLClassLoader.java:382) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 7 more

Dockerfile:

FROM openjdk:8-jre
COPY /target/application.jar /tmp/application.jar
WORKDIR /tmp
ENTRYPOINT ["java", "-cp", "application.jar", "Package.ClassWithMain"]

Thank you in advance, Mondher

Forget about docker first. Can you try running your jar on your command line, without Intellij. I have a doubt on how you have created your jar file. It might not have all runtime/dependencies required. — Gorav Singal

Unknown Unknown · Accepted Answer · 2019-07-26T14:47:52

You: COPY /target/application.jar /tmp/application.jar Try: COPY . /usr/src/myapp

You: WORKDIR /tmp Try: WORKDIR /usr/src/myapp

Look for its written, should help!

RUN javac Main.java CMD ["java", "Main"]

Docker Container error when i run docker Run

2 Answers