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Troubleshooting

DSF-Team11/25/25About 1 min

"Input must be a JAR file" Error

Problem: The linter only accepts JAR files as input.

Solution:

# Wrong - Maven project directly
java -jar linter-cli/target/linter-cli-1.0-SNAPSHOT.jar \
  --path /path/to/project --html

# Correct - Build first, then lint JAR
cd /path/to/project && mvn clean package
java -jar linter-cli/target/linter-cli-1.0-SNAPSHOT.jar \
  --path /path/to/project/target/my-plugin-1.0.0.jar --html

JAR File Not Found

Problem: The specified JAR file path cannot be found.

Solution: Verify the path and use absolute paths if needed:

# Windows
java -jar linter-cli/target/linter-cli-1.0-SNAPSHOT.jar \
  --path "C:\Users\Username\project\target\plugin.jar" --html

# Linux/Mac
java -jar linter-cli/target/linter-cli-1.0-SNAPSHOT.jar \
  --path /home/username/project/target/plugin.jar --html

Missing Dependencies

Problem: ClassNotFoundException or similar errors during linting.

Solution:

# Check Maven settings
ls ~/.m2/settings.xml

# Use verbose mode to see detailed error messages
java -jar linter-cli/target/linter-cli-1.0-SNAPSHOT.jar \
  --path plugin.jar --html --verbose

# Check if dependencies are in the JAR
jar -tf plugin.jar | grep -i "class"

Report Not Generated

Problem: No report files are created.

Solution:

# --html or --json flag must be set
java -jar linter-cli/target/linter-cli-1.0-SNAPSHOT.jar \
  --path plugin.jar --html  # ā† Required

# Use absolute path for report directory
java -jar linter-cli/target/linter-cli-1.0-SNAPSHOT.jar \
  --path plugin.jar --html --report-path $(pwd)/reports

# Check write permissions
ls -ld /tmp/dsf-linter-report-*

Remote JAR Download Error

Problem: Cannot download JAR from remote URL.

Solution:

# Test download separately
curl -L -o test.jar https://example.com/plugin.jar

# Verify the download
ls -lh test.jar

# Check network connectivity
ping example.com

# Then use the local file
java -jar linter-cli/target/linter-cli-1.0-SNAPSHOT.jar \
  --path test.jar --html

Plugin Not Found

Problem: "No plugins found" message.

Solution:

  • Verify ServiceLoader registration exists in META-INF/services/
  • Check that plugin class is in the JAR file
  • Ensure plugin class implements the correct interface
  • Use --verbose to see detailed discovery logs
  • Check API version compatibility

Out of Memory Errors

Problem: OutOfMemoryError during linting.

Solution:

# Increase heap size
java -Xmx2g -jar linter-cli/target/linter-cli-1.0-SNAPSHOT.jar \
  --path plugin.jar --html

# For very large projects
java -Xmx4g -Xms1g -jar linter-cli/target/linter-cli-1.0-SNAPSHOT.jar \
  --path plugin.jar --html

Slow Performance

Problem: Linting takes too long.

Solution:

  • Use -DskipTests during build
  • Disable verbose logging in production
  • Check network latency for remote JARs
  • Consider increasing heap size
  • Profile with JVM tools if needed

Class Loading Issues

Problem: Classes cannot be loaded from plugin JAR.

Solution:

  • Verify JAR structure
  • Check classpath configuration
  • Ensure dependencies are included
  • Use verbose mode to see classloader logs
  • Check API version compatibility
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