Ankur Mhatre
6af6e4a3f1
Three replicas of one application against one PostgreSQL database, proving duplicate @Scheduled execution and then removing it with ShedLock: 24 executions where 8 were due, then 7 for 7 ticks. Also measured: @SchedulerLock without @EnableSchedulerLock does nothing and warns about nothing; spring.task.scheduling.pool.size=1 does not starve a fixedRate job but delays it and fires 35 of 40 executions in a burst; and a node whose clock is 40 seconds fast takes a live lock unless the provider uses usingDbTime().
16 lines
644 B
Docker
16 lines
644 B
Docker
# Used only by docker-compose.yml. The committed transcripts under docs/output/ were produced
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# without Docker, by scripts/three-replicas.sh against the PostgreSQL that scripts/postgres.sh
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# unpacks into target/.
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FROM eclipse-temurin:25-jdk AS build
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WORKDIR /src
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COPY pom.xml .
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RUN --mount=type=cache,target=/root/.m2 \
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apt-get update && apt-get install -y --no-install-recommends maven && \
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mvn -B -q dependency:go-offline
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COPY src ./src
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RUN --mount=type=cache,target=/root/.m2 mvn -B -q -DskipTests package
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FROM eclipse-temurin:25-jre
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COPY --from=build /src/target/scheduling-1.0.jar /app.jar
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ENTRYPOINT ["java", "-jar", "/app.jar"]
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