Java Agent failed to connect to localhost sidekick

[minuth]

I cannot run the Java agent with the self-hosting sidekick, but there is no problem if I connect this self-hosting with the NodeJS project.

• Error

• Docker file

FROM maven:3.8.6-eclipse-temurin-17-alpine AS MAVEN_BUILD

COPY pom.xml /build/
COPY src /build/src/

WORKDIR /build/

RUN mvn -Dmaven.test.skip=true package -Ptest

FROM openjdk:17

WORKDIR /app

COPY sidekick-agent-bootstrap-0.0.14.jar /app/

COPY --from=MAVEN_BUILD /build/target/ecommerceportal-0.0.1-SNAPSHOT.jar /app/

ENTRYPOINT ["java", "-javaagent:sidekick-agent-bootstrap-0.0.14.jar", "-jar", "ecommerceportal-0.0.1-SNAPSHOT.jar"]

• Docker compose

version: '3.8'
services:
  ecommerceportal-v2:
    build: .
    container_name: 'ecommerceportal-v2-container'
    environment:
      - SIDEKICK_AGENT_BROKER_HOST=ws://127.0.0.1
      - SIDEKICK_AGENT_BROKER_PORT=7777
      - SIDEKICK_APIKEY=my-token
    ports:
      - 8088:8088

[boroskoyo]

Hi Minuth, the issue seems to be about your SIDEKICK_AGENT_BROKER_HOST setting the compose file. Since both broker and your app are expected to run in different containers, instead of 127.0.0.1, you should either give the container name (if they are defined in the same compose file) or the external IP of the host that runs the broker. You can also find extra information about docker networking on their docs: https://docs.docker.com/network/

[minuth]

Thanks @boroskoyo I understood the problem now 🙏.

[boroskoyo]

great news!