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kotlinlang

I am having issues with docker containerized application, it is not creating sessions and throws `java.util.NoSuchElementException: No session data found for id b8130c2077351466`, it works fine without containerizing it. Also, I am new to docker . Is there something I need to do that I am missing?

Are you writing sessions to the file system? If so, you may need to add the correct permissions for the user you’re using to run you container

Yes I am using file systems. But I have done `chown` for the `WORKDIR` I am using already, do I need to grant some access to the session directory separately?

```FROM openjdk:8-jre-alpine

ENV APPLICATION_USER ktor
RUN adduser -D -g '' $APPLICATION_USER

RUN mkdir /app
RUN chown -R $APPLICATION_USER /app

USER $APPLICATION_USER

COPY ./build/libs/dekemi-site.jar /app/dekemi-site.jar
WORKDIR /app

CMD ["java", "-server", "-XX:+UnlockExperimentalVMOptions", "-XX:+UseCGroupMemoryLimitForHeap", "-XX:InitialRAMFraction=2", "-XX:MinRAMFraction=2", "-XX:MaxRAMFraction=2", "-XX:+UseG1GC", "-XX:MaxGCPauseMillis=100", "-XX:+UseStringDeduplication", "-jar", "dekemi-site.jar"]```

Have you tried making that directory writable via chmod?

One thing I would do do speed up your feedback loop is actually run your container locally, exec into it `docker exec -it &lt;name-of-your-container&gt; /bin/bash` (find the name of your container via `docker ps`), cd to the parent directory of wherever you’re writing sessions to, `ls -la` to see what the existing permissions are, and if necessary in your dockerfile run `chmod 775 &lt;your-directory&gt;`.

I think I could write this in docker file right?
`RUN mkdir /.sessions`
`RUN chmod 775 /.sessions`?