How do I enable DynamoDB Local Logging?

1. Go to the directory that has the DynamoDBLocal.jar
2. Create a file called log4j2.xml with these contents:

  <?xml version="1.0" encoding="UTF-8"?>
        <Configuration status="WARN">
          <Appenders>
              <Console name="Console" target="SYSTEM_OUT">
                      <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
              </Console>
          </Appenders>
              <Loggers>
              <Logger name="com.amazonaws.services.dynamodbv2.local" level="DEBUG">
                  <AppenderRef ref="Console"/>
              </Logger>
            <Logger name="com.amazonaws.services.dynamodbv2.local.shared.access.sqlite.SQLiteDBAccess" level="INFO">
              <AppenderRef ref="Console"/>
            </Logger>
             <Root level="WARN">
              <AppenderRef ref="Console"/>
            </Root>
          </Loggers>
        </Configuration>

3. Remove the existing log4j2.xml from the jar

zip -d DynamoDBLocal.jar log4j2.xml

4. Add the created log4j2.xml to the jar

zip -u DynamoDBLocal.jar log4j2.xml

or simply edit the log4j2.xml in the DynamoDBLocal.jar using 7-Zip etc. and overwrite it with the xml above and skip the steps 2-4.

1. Change to the directory with DynamoDBLocal.jar

2. Create a new file called log4j.properties with the contents:

   log4j.rootLogger=DEBUG, stdout

   log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=LOG%d %p [%c] - %m%n

3. Remove the existing log4j.properties files from the jar (there might be two)

   zip -d DynamoDBLocal.jar log4j.properties

   zip -d DynamoDBLocal.jar log4j.properties

4. Add the new properties file to the jar

   zip -u DynamoDBLocal.jar log4j.properties

Source: https://gist.github.com/mdaley/aaf9b62d90f6817eb72a