Java Community | Help. Code. Learn.•2w ago

Hotswapping with JBR and HotSwapAgent

hey, im trying to install the jetbrain runtime in a docker container along with hotswap agent. I am running on an arm ubuntu machine and tried the aarch JBR releases JCEF (fastdebug) and JBRSDK. I put the hotswap-agent.jar in lib/hotswap and i still get the error Unrecognized VM option 'AllowEnhancedClassRedefinition', im using java 21

17 Replies

JavaBot•2w ago

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LianecxOP•2w ago

services:
  testing-server:
    image: itzg/minecraft-server:java21
    container_name: testing-server
    ports:
      - "25565:25565"
      - "11111:11111"
      - "19132:19132/udp"
      - "5005:5005"
    environment:
      VERSION: "LATEST"
      EULA: TRUE
      TYPE: "PAPER"
      OPS: "Lianecx"
      ENABLE_WHITELIST: FALSE
      SERVER_PORT: 25565
      ENFORCE_WHITELIST: TRUE
      INIT_MEMORY: 5G
      MEMORY: 5G
      GUI: FALSE
      ENABLE_ROLLING_LOGS: true
      USE_AIKAR_FLAGS: false
      UID: 1001
      GID: 1001

      # HotSwapping
      JAVA_HOME: /opt/jbr
      JVM_OPTS: "-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=*:5005"
      JVM_XX_OPTS: "-XX:+AllowEnhancedClassRedefinition -XX:HotswapAgent=fatjar"
    tty: true
    stdin_open: true
    restart: 'no'
    volumes:
      # attach a directory relative to the directory containing this compose file
      - ./data:/data

      # HotSwapping
      - /home/ubuntu/jbr_fd-21.0.8-linux-aarch64-b1138.52:/opt/jbr:ro

services:
  testing-server:
    image: itzg/minecraft-server:java21
    container_name: testing-server
    ports:
      - "25565:25565"
      - "11111:11111"
      - "19132:19132/udp"
      - "5005:5005"
    environment:
      VERSION: "LATEST"
      EULA: TRUE
      TYPE: "PAPER"
      OPS: "Lianecx"
      ENABLE_WHITELIST: FALSE
      SERVER_PORT: 25565
      ENFORCE_WHITELIST: TRUE
      INIT_MEMORY: 5G
      MEMORY: 5G
      GUI: FALSE
      ENABLE_ROLLING_LOGS: true
      USE_AIKAR_FLAGS: false
      UID: 1001
      GID: 1001

      # HotSwapping
      JAVA_HOME: /opt/jbr
      JVM_OPTS: "-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=*:5005"
      JVM_XX_OPTS: "-XX:+AllowEnhancedClassRedefinition -XX:HotswapAgent=fatjar"
    tty: true
    stdin_open: true
    restart: 'no'
    volumes:
      # attach a directory relative to the directory containing this compose file
      - ./data:/data

      # HotSwapping
      - /home/ubuntu/jbr_fd-21.0.8-linux-aarch64-b1138.52:/opt/jbr:ro

this is my docker compose

JavaBot•2w ago

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LianecxOP•2w ago

its only a problem inside of docker, outside it works

Peter Rader•2w ago

In the docker compose you wrote JVM_XX_OPTS: "-XX:+AllowEnhancedClassRedefinition -XX:HotswapAgent=fatjar" Have you tried to use JVM_XX_OPTS: "-XX:HotswapAgent=fatjar" instead?

LianecxOP•2w ago

yea well i do want the enhanced class redefinition though and if i run itousdie of docker, it works with the option its also incredibly slow to the point its not usable anymore

Peter Rader•2w ago

They decided that its not gona work. They dropped the feature. You need a JDK version that support AllowEnhancedClassRedefinition. Its JDK8. Going back from 21 to 8 is a dealbreaker?

dan1st•2w ago

Is that even a question?

Peter Rader•2w ago

Yes, sentences with a questionmark at the end used to be questions. The more you know ... 😄

dan1st•2w ago

I meant that going back from JDK 21 to JDK 8 is normally not an option and definitely shouldn't be Also what's the Dockerfile?

Peter Rader•2w ago

He posted the docker compose.

dan1st•2w ago

yes but that uses an image I don't know so I want to see the Dockerfile used to generate that image

Peter Rader•2w ago

There is no image. The docker compose is in text form. I see you like to take the question from here. I let it in behalf of your hands mate. I am out, bye.

dan1st•2w ago

image: itzg/minecraft-server:java21

that's in the Docker compose file and I want to know how the image itzg/minecraft-server:java21 was built - which normally happens using a Dockerfile a Docker compose file is useless without an image somewhere

JavaBot•2w ago

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This post has been inactive for over 300 minutes, thus, it has been archived. If your question was not answered yet, feel free to re-open this post or create a new one. In case your post is not getting any attention, you can try to use /help ping. Warning: abusing this will result in moderative actions taken against you.

Peter Rader•2w ago

Oh I knew I remember the JVMFlag. It is a hotswapagent.org thing. You need Jetbrains17 not 21. 21 is not supported.

JavaBot•2w ago

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💤 Post marked as dormant

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