aws-node-rest-api-with-dynamodb-and-offline class not found error

Please LMK if I've made a basic mistake, or if more info is needed.

Steps to reproduce:

Computer:aws-node-rest-api-with-dynamodb-and-offline paul$ export SLS_DEBUG=*
Computer:aws-node-rest-api-with-dynamodb-and-offline paul$ serverless offline start
Serverless: Load command run
Serverless: Load command config
Serverless: Load command config:credentials
Serverless: Load command create
Serverless: Load command install
Serverless: Load command package
Serverless: Load command deploy
Serverless: Load command deploy:function
Serverless: Load command deploy:list
Serverless: Load command deploy:list:functions
Serverless: Load command invoke
Serverless: Load command invoke:local
Serverless: Load command info
Serverless: Load command logs
Serverless: Load command login
Serverless: Load command logout
Serverless: Load command metrics
Serverless: Load command print
Serverless: Load command remove
Serverless: Load command rollback
Serverless: Load command rollback:function
Serverless: Load command slstats
Serverless: Load command plugin
Serverless: Load command plugin
Serverless: Load command plugin:install
Serverless: Load command plugin
Serverless: Load command plugin:uninstall
Serverless: Load command plugin
Serverless: Load command plugin:list
Serverless: Load command plugin
Serverless: Load command plugin:search
Serverless: Load command emit
Serverless: Load command config
Serverless: Load command config:credentials
Serverless: Load command rollback
Serverless: Load command rollback:function
Serverless: Load command dynamodb
Serverless: Load command dynamodb:migrate
Serverless: Load command dynamodb:seed
Serverless: Load command dynamodb:start
Serverless: Load command dynamodb:noStart
Serverless: Load command dynamodb:remove
Serverless: Load command dynamodb:install
Serverless: Load command offline
Serverless: Load command offline:start
Serverless: Invoke offline:start
Dynamodb Local Started, Visit: http://localhost:8000/shell
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/logging/log4j/spi/ExtendedLogger
	at com.amazonaws.services.dynamodbv2.local.shared.logging.LogManager.<clinit>(LogManager.java:28)
	at com.amazonaws.services.dynamodbv2.local.server.DynamoDBProxyServer.<clinit>(DynamoDBProxyServer.java:36)
	at com.amazonaws.services.dynamodbv2.local.main.ServerRunner.createServer(ServerRunner.java:124)
	at com.amazonaws.services.dynamodbv2.local.main.ServerRunner.createServerFromCommandLineArgs(ServerRunner.java:120)
	at com.amazonaws.services.dynamodbv2.local.main.ServerRunner.main(ServerRunner.java:71)
Caused by: java.lang.ClassNotFoundException: org.apache.logging.log4j.spi.ExtendedLogger
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 5 more
DynamoDB Local failed to start with code 1
Serverless: DynamoDB - Error - 
 
  Networking Error ---------------------------------------
 
  connect ECONNREFUSED 127.0.0.1:8000
 
     For debugging logs, run again after setting the "SLS_DEBUG=*" environment variable.
 
  Stack Trace --------------------------------------------
 
NetworkingError: connect ECONNREFUSED 127.0.0.1:8000
    at Object._errnoException (util.js:1031:13)
    at _exceptionWithHostPort (util.js:1052:20)
    at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1195:14)
From previous event:
    at PluginManager.invoke (/usr/local/lib/node_modules/serverless/lib/classes/PluginManager.js:366:22)
    at PluginManager.run (/usr/local/lib/node_modules/serverless/lib/classes/PluginManager.js:397:17)
    at variables.populateService.then (/usr/local/lib/node_modules/serverless/lib/Serverless.js:104:33)
    at runCallback (timers.js:800:20)
    at tryOnImmediate (timers.js:762:5)
    at processImmediate [as _immediateCallback] (timers.js:733:5)
From previous event:
    at Serverless.run (/usr/local/lib/node_modules/serverless/lib/Serverless.js:91:74)
    at serverless.init.then (/usr/local/lib/node_modules/serverless/bin/serverless:42:50)
    at <anonymous>
 
  Get Support --------------------------------------------
     Docs:          docs.serverless.com
     Bugs:          github.com/serverless/serverless/issues
     Forums:        forum.serverless.com
     Chat:          gitter.im/serverless/serverless
 
  Your Environment Information -----------------------------
     OS:                     darwin
     Node Version:           9.2.1
     Serverless Version:     1.24.1

Start by reproducing the issue with serverless offline start in the aws-node-rest-api-with-dynamodb-and-offline example, then inspect how DynamoDB Local is started and which dependencies it receives. Done means DynamoDB Local starts without the missing ExtendedLogger class and the example can connect successfully on port 8000.