Wrong JRE version on the docker image

[pepjo]

Describe the bug
When running Franklin from the published docker image I get the following error:

Exception in thread "raster-io-1" java.lang.UnsupportedClassVersionError: com/zaxxer/hikari/HikariConfig has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:756)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:473)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
        at com.azavea.franklin.commands.DatabaseConfig$FromComponents.toHikariConfig(DatabaseConfig.scala:54)
        at com.azavea.franklin.api.Server$.$anonfun$createServer$3(Server.scala:95)
        at cats.effect.Resource.$anonfun$fold$1(Resource.scala:124)
        at cats.effect.internals.IOBracket$BracketStart.liftedTree1$1(IOBracket.scala:95)
        at cats.effect.internals.IOBracket$BracketStart.run(IOBracket.scala:95)
        at cats.effect.internals.Trampoline.cats$effect$internals$Trampoline$$immediateLoop(Trampoline.scala:67)
        at cats.effect.internals.Trampoline.startLoop(Trampoline.scala:35)
        at cats.effect.internals.TrampolineEC$JVMTrampoline.super$startLoop(TrampolineEC.scala:90)
        at cats.effect.internals.TrampolineEC$JVMTrampoline.$anonfun$startLoop$1(TrampolineEC.scala:90)
        at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
        at scala.concurrent.BlockContext$.withBlockContext(BlockContext.scala:85)
        at cats.effect.internals.TrampolineEC$JVMTrampoline.startLoop(TrampolineEC.scala:90)
        at cats.effect.internals.Trampoline.execute(Trampoline.scala:43)
        at cats.effect.internals.TrampolineEC.execute(TrampolineEC.scala:42)
        at cats.effect.internals.IOBracket$BracketStart.apply(IOBracket.scala:80)
        at cats.effect.internals.IOBracket$BracketStart.apply(IOBracket.scala:58)
        at cats.effect.internals.IORunLoop$.cats$effect$internals$IORunLoop$$loop(IORunLoop.scala:192)
        at cats.effect.internals.IORunLoop$.restart(IORunLoop.scala:41)
        at cats.effect.internals.IOBracket$.$anonfun$apply$1(IOBracket.scala:48)
        at cats.effect.internals.IOBracket$.$anonfun$apply$1$adapted(IOBracket.scala:34)
        at cats.effect.internals.IOAsync$.$anonfun$apply$1(IOAsync.scala:37)
        at cats.effect.internals.IOAsync$.$anonfun$apply$1$adapted(IOAsync.scala:37)
        at cats.effect.internals.IORunLoop$RestartCallback.start(IORunLoop.scala:464)
        at cats.effect.internals.IORunLoop$.cats$effect$internals$IORunLoop$$loop(IORunLoop.scala:165)
        at cats.effect.internals.IORunLoop$RestartCallback.signal(IORunLoop.scala:480)
        at cats.effect.internals.IORunLoop$RestartCallback.apply(IORunLoop.scala:501)
        at cats.effect.internals.IORunLoop$RestartCallback.apply(IORunLoop.scala:439)
        at cats.effect.internals.IOShift$Tick.run(IOShift.scala:36)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:750)

which seems to indicate that it's trying to run on Java 8 but needs Java 11. This is confirmed by looking at the Dockerfile here: https://github.com/azavea/franklin/blob/master/application/Dockerfile

Expected behavior
The docker image should come with the right version of docker

Additional context
I've tried the two latest images: quay.io/azavea/franklin:e844dc8 and quay.io/azavea/franklin:adf474c

[pepjo]

I've tried building my own docker image using JRE 11 and it seems to work, I used:

FROM quay.io/azavea/franklin:adf474c AS franklin

FROM openjdk:11-jre-slim

RUN \
      addgroup --system franklin \
      && adduser --system --disabled-login --disabled-password \
      --home /var/lib/franklin \
      --shell /sbin/nologin \
      --ingroup franklin \
      -u 1000 \
      franklin

COPY --from=franklin /var/lib/franklin/ /var/lib/franklin/

USER franklin
WORKDIR /var/lib/franklin

ENTRYPOINT ["java", "-XX:+UnlockExperimentalVMOptions", "-jar", "franklin-api-assembly.jar"]

I had to remove UseCGroupMemoryLimitForHeap since it is no longer supported.

I am happy to make a PR with the changes.

[FireByTrial]

I had the same issue but had to make some minor changes to the application/Dockerfile.dev and docker-compose.yml

I had to add the data-files directory (could use copy too)

FROM quay.io/azavea/franklin:adf474c AS franklin

FROM openjdk:11-jre-slim

RUN \
      addgroup --system franklin \
      && adduser --system --disabled-login --disabled-password \
      --home /var/lib/franklin \
      --shell /sbin/nologin \
      --ingroup franklin \
      -u 1000 \
      franklin

COPY --from=franklin /var/lib/franklin/ /var/lib/franklin/

USER franklin
WORKDIR /var/lib/franklin

ADD ./data-files /var/lib/data-files

ENTRYPOINT ["java", "-XX:+UnlockExperimentalVMOptions", "-jar", "franklin-api-assembly.jar"]

and the command in the docker-compose.yml needed to be updated to:

version: '2.3'
services:
  franklin:
    container_name: franklin-app
    build:
      context: .
      dockerfile: application/Dockerfile.dev
    environment:
      - PGHOST=pgstac
      - PGDATABASE=postgis
      - PGUSER=franklin
      - PGPASSWORD=franklin
      - API_STAC_HIERARCHY=data-files/hierarchy_example.json
    ports:
      - "9090:9090"
    volumes:
      - ./:/opt/src/
    command: serve