Error "Address already in use" while running example chat server with serverless-offline

[tkwong94]

I am trying to run the example chat sever code with severless-offline but exception occurs, saying the port 8000 is already in use.

Steps to reproduce:

1. sls dynamodb install
2. sls dynamodb start
   => Dynamodb Local Started in port 8000
3. Open another terminal window and run yarn start
   => Error happens, see below for the detailed message

Packages:
"serverless-dynamodb-local": "^0.2.38",
"serverless-offline": "^5.12.1",
"serverless-plugin-offline-dynamodb-stream": "^1.0.19",

Error messages:
Exception in thread "main" java.io.IOException: Failed to bind to 0.0.0.0/0.0.0.0:8000 at org.eclipse.jetty.server.ServerConnector.openAcceptChannel(ServerConnector.java:346) at org.eclipse.jetty.server.ServerConnector.open(ServerConnector.java:308) at org.eclipse.jetty.server.AbstractNetworkConnector.doStart(AbstractNetworkConnector.java:80) at org.eclipse.jetty.server.ServerConnector.doStart(ServerConnector.java:236) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at org.eclipse.jetty.server.Server.doStart(Server.java:396) at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at com.amazonaws.services.dynamodbv2.local.server.DynamoDBProxyServer.start(DynamoDBProxyServer.java:83) at com.amazonaws.services.dynamodbv2.local.main.ServerRunner.main(ServerRunner.java:76) Caused by: java.net.BindException: Address already in use at java.base/sun.nio.ch.Net.bind0(Native Method) at java.base/sun.nio.ch.Net.bind(Net.java:479) at java.base/sun.nio.ch.Net.bind(Net.java:468) at java.base/sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:220) at java.base/sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:88) at org.eclipse.jetty.server.ServerConnector.openAcceptChannel(ServerConnector.java:342) ... 8 more