Can't configure HotSwapAgent in alfresco SDK 4.1

DavideZucchelli — Thu, 17 Apr 2025 13:08:39 GMT

Hello,

I'm trying to install hotswap agent in an Alfersco sdk 4.1 platform project, I see that hotswapagent is enabled in the logs but actually the reload of the classes does not happen. i've followed the guide so i0ve added in Dockerfile:

# HOTSWAP AGENT
# Install and configure Trava OpenJDK (OpenJDK pre-built with DCEVM and hotswap agent for Java 11)
COPY trava-jdk-11-dcevm.tar.gz $TOMCAT_DIR
RUN tar -xvf $TOMCAT_DIR/trava-jdk-11-dcevm.tar.gz -C /usr/java/ && \
    rm $TOMCAT_DIR/trava-jdk-11-dcevm.tar.gz && \
    alternatives --install /usr/bin/java java /usr/java/dcevm-11.0.1+7/bin/java 40000 && \
    alternatives --install /usr/bin/javac javac /usr/java/dcevm-11.0.1+7/bin/javac 40000 && \
    alternatives --install /usr/bin/jar jar /usr/java/dcevm-11.0.1+7/bin/jar 40000 && \
    alternatives --set java /usr/java/dcevm-11.0.1+7/bin/java && \
    alternatives --set javac /usr/java/dcevm-11.0.1+7/bin/javac && \
    alternatives --set jar /usr/java/dcevm-11.0.1+7/bin/jar && \
    ln -sfn /usr/java/dcevm-11.0.1+7 /usr/java/latest && \
    ln -sfn /usr/java/dcevm-11.0.1+7 /usr/java/default
COPY hotswap-agent.properties $TOMCAT_DIR/webapps/alfresco/WEB-INF/classes

and in docker-compose.yml:

skdl-web-alfresco-acs:
image: alfresco-content-services-skdl-web-alfresco:development
build:
dockerfile: ./Dockerfile
context: ../../../target
environment:
CATALINA_OPTS: "-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=8888"
 command: ["catalina.sh", "run"]
ports:
- "${acs.port}:8080"
 - "${acs.debug.port}:8888"
 volumes:
- skdl-web-alfresco-acs-volume:/usr/local/tomcat/alf_data
- ../../../target/classes:/usr/local/tomcat/hotswap-agent/skdl-web-alfresco/target/classes
- ../../../target/test-classes:/usr/local/tomcat/hotswap-agent/skdl-web-alfresco/target/test-classes
depends_on:
- skdl-web-alfresco-postgres

As I said hotswapagent reloads the classes in the mount points. But if I print in a class ClassName.class.getProtectionDomain().getCodeSource().getLocation(), I see that it comes from the jar file and not from hotswapagent, in fact if I make a change to the class it is not modified "hot".

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Can't configure HotSwapAgent in alfresco SDK 4.1