I was trying to get a remote debug session running on my docker container. Actually the debug session always gets blocked by an IOException.. Dockerfile Entrypoint: Any ideas, whats wrong with this? Answer since java 9 you have to specify your adapter, or simply use an escaper for the debug host as such: grea…
Tag: docker
Docker (Spring Boot or Thorntail) and Keycloak
i have a Problem Running Spring Boot and Keycloak both in docker containers. I started with Keycloak with mysql as db running in docker. Then i added my realm (SpringBootKeycloak), my client (testclient), and a user with role ‘user’. After that i added spring-security to my Spring-boot-application…
Docker and Java – FontConfiguration issue
We’ve got a Java application that generates word documents using a 3rd party (Asposee but I don’t think it matters here). The app is built from a simple Docker file: When we build the application locally (mvn package then docker build) and run the application inside k8s it works well. However, whe…
getting a java.lang.ClassNotFoundException when starting a Docker container
I am having a problem starting a .jar file within a Docker Container. The error message I am getting is: Exception in thread “main” java.lang.ClassNotFoundException: ccinfw.MainApplication I have added information below. Why am I getting this error and how can I fix it? TIA Manifest File ran jar -…
Maven build and maven-failsafe-plugin – The forked VM terminated without properly saying goodbye
I use Docker and https://github.com/fabric8io/docker-maven-plugin for my integration tests. On my Windows 10 (after updating to Windows 10 1709) machine I faced the following error with my Maven 3.5.0 build: Right now I have no idea what can be wrong, I don’t see any failures with my tests. What can be …
docker stats shows zero memory usage even for running containers
I have two containers ran by Docker Swarm: Host OS is Debian Jessie. There are JVM applications in both containers. Why does docker stats show zero memory usage? Should I configure my Java apps somehow to be able to see memory usage in docker stats? Is there some other way to check memory usage? Answer It is …
Docker and Eureka with Spring Boot failing to register clients
I have a very simple demo of using Spring Boot + Docker Compose + Eureka. My server runs on port 8671 with the following application properties: My Eureka client runs on port 9000 with the following application properties: When I start up my docker.compose file in the parent maven project, this is the content…
Mac host doesn’t like Docker container port forwarding
I am experimenting with Docker for the first time, and am trying to get a Spring Boot web app to run inside a Docker container. I am building the app (which packages up into a self-contained jar) and then adding it to the Docker image (which is what I want). You can find my SSCCE at this Bootup repo on
Build docker image with jetty – when should I build?
I’m working on ‘dockerizing’ a java web application (https://github.com/kermitt2/grobid) which I want to run using jetty. Here the Dockerfile: The current docker image works perfectly, but it requires the application to be built before (it cannot be built from the fresh git clone). For examp…
How to pass System property to docker containers?
So I know you can pass Environment variables to a docker container using -e like: But I need to pass a System Property to a docker container, because this is how I run my JAR: So how can I pass a -D System property in Docker? Like: Answer Use the variable you passed into the container on the java command: