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Building Apache Druid with Maven, managing memory constraints, and skipping verification checks.
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| name | maven-druid-build |
| description | Building Apache Druid with Maven, managing memory constraints, and skipping verification checks. |
cd /root/druid
mvn clean package \
-DskipTests \
-Dcheckstyle.skip=true \
-Dpmd.skip=true \
-Dforbiddenapis.skip=true \
-Dspotbugs.skip=true \
-Danimal.sniffer.skip=true \
-Denforcer.skip=true \
-Djacoco.skip=true \
-Ddependency-check.skip=true \
-pl '!web-console' \
-pl indexing-service \
-am
| Flag | Purpose |
|---|---|
clean | Remove previous build artifacts |
package | Compile and package into JAR/WAR |
-DskipTests | Skip unit test execution |
-Dcheckstyle.skip=true | Skip code style checking |
-Dpmd.skip=true | Skip PMD analysis |
-Dforbiddenapis.skip=true | Skip forbidden API checking |
-Dspotbugs.skip=true | Skip SpotBugs (FindBugs) analysis |
-Danimal.sniffer.skip=true | Skip JDK version compatibility checks |
-Denforcer.skip=true | Skip Maven Enforcer rules |
-Djacoco.skip=true | Skip code coverage analysis |
-Ddependency-check.skip=true | Skip OWASP dependency checking |
-pl '!web-console' | Exclude web-console module (memory constraint) |
-pl indexing-service | Include indexing-service module |
-am | Also make dependencies of selected projects |
If you encounter OOM (Out of Memory) errors:
# Increase heap size
export MAVEN_OPTS="-Xmx2g -Xms1g"
# Very aggressive heap limit
export MAVEN_OPTS="-Xmx1g -Xms512m"
To speed up builds with multiple cores:
mvn clean package -T 1C # 1 thread per core
After successful build:
druid/indexing-service/target/druid-indexing-service-0.20.0-SNAPSHOT.jar
druid/distribution/target/apache-druid-0.20.0-SNAPSHOT/lib/
# Check if JAR was created
ls -la indexing-service/target/*.jar
# Check build log for errors
tail -100 build.log
# Verify specific file was included
jar tf indexing-service/target/*.jar | grep "JavaScriptFilter"
# Verify module exists
ls -la indexing-service/pom.xml
# Rebuild parent projects
mvn clean install -pl '!web-console'
# Detailed error output
mvn clean package -X 2>&1 | tail -50
# Compile only (no packaging)
mvn clean compile
# Build specific module and dependencies
mvn clean package -pl indexing-service -am
# Build without tests but with other checks
mvn clean package -DskipTests
# Minimal build for testing
mvn clean package -DskipTests -Denforcer.skip=true