py4j failing to run in Docker container

Asked Jul 18 '18 at 17:44

Active Jul 18 '18 at 17:44

Viewed 701 times

I'm trying to run the Getting Started app from a Docker container and I'm running into the following error.

py4j.protocol.Py4JNetworkError: An error occurred while trying to connect to the Java server (127.0.0.1:25333)

I haven't changed any settings on either side of the gateway.

My Dockerfile is below.

# start building off a base image with JDK already installed
FROM java:openjdk-8-jdk-alpine

WORKDIR /app

ADD . /app

RUN apk update
RUN apk add --no-cache python3
RUN apk add --no-cache py-pip

RUN pip install -r requirements.txt

EXPOSE 5001

CMD ["python", "server.py"]

Port 5001 is for my application server which instantiates the JavaGateway.

asked Jul 18 '18 at 17:44

Carpetfizz

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Is Java server running on your host machine? – Shiva Jul 18 '18 at 18:13
Java is running but the Gateway is not – Carpetfizz Jul 18 '18 at 18:14
Try `docker run --net="host" `. This will make the container share the same network as your local machine. – Shiva Jul 18 '18 at 18:19
No luck unfortunately – Carpetfizz Jul 18 '18 at 18:42
Check these - https://stackoverflow.com/questions/35664994/py4j-protocol-py4jnetworkerror-an-error-occurred-while-trying-to-connect-to-th and https://github.com/bartdag/py4j/issues/262. You may have to use the `--net="host" option in conjunction with the solutions mentioned in the 2 links – Shiva Jul 18 '18 at 19:14
@Shiva thanks but I have already tried those solutions – Carpetfizz Jul 18 '18 at 20:11

py4j failing to run in Docker container

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