docker for mac error when following readme

[melchoir55]

I get the following error when following the readme and running the docker image:

[2019-06-26 22:23:52.492]  - 6  WARN [main-SendThread(localhost:2181)] --- ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)

Full log:

➜  Kafdrop git:(master) docker run -p 9000:9000 -e ZOOKEEPER_CONNECT=localhost:2181,localhost:2181 kafdrop
[2019-06-26 22:23:43.305]  - 6  INFO [main] --- KafDrop: Starting KafDrop on 8a20e8425578 with PID 6 (/kafdrop-2.0.6/kafdrop-2.0.6.jar started by root in /)
[2019-06-26 22:23:43.311]  - 6  INFO [main] --- KafDrop: No active profile set, falling back to default profiles: default
[2019-06-26 22:23:43.426]  - 6  INFO [main] --- AnnotationConfigEmbeddedWebApplicationContext: Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@574caa3f: startup date [Wed Jun 26 22:23:43 UTC 2019]; root of context hierarchy
[2019-06-26 22:23:47.170]  - 6  INFO [main] --- TomcatEmbeddedServletContainer: Tomcat initialized with port(s): 9000 (http)
[2019-06-26 22:23:47.204]  - 6  INFO [main] --- StandardService: Starting service Tomcat
[2019-06-26 22:23:47.206]  - 6  INFO [main] --- StandardEngine: Starting Servlet Engine: Apache Tomcat/8.0.36
[2019-06-26 22:23:47.397]  - 6  INFO [localhost-startStop-1] --- [/]: Initializing Spring embedded WebApplicationContext
[2019-06-26 22:23:47.398]  - 6  INFO [localhost-startStop-1] --- ContextLoader: Root WebApplicationContext: initialization completed in 3977 ms
[2019-06-26 22:23:48.089]  - 6  INFO [localhost-startStop-1] --- ServletRegistrationBean: Mapping servlet: 'dispatcherServlet' to [/]
[2019-06-26 22:23:48.100]  - 6  INFO [localhost-startStop-1] --- FilterRegistrationBean: Mapping filter: 'characterEncodingFilter' to: [/*]
[2019-06-26 22:23:48.100]  - 6  INFO [localhost-startStop-1] --- FilterRegistrationBean: Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
[2019-06-26 22:23:48.101]  - 6  INFO [localhost-startStop-1] --- FilterRegistrationBean: Mapping filter: 'httpPutFormContentFilter' to: [/*]
[2019-06-26 22:23:48.101]  - 6  INFO [localhost-startStop-1] --- FilterRegistrationBean: Mapping filter: 'requestContextFilter' to: [/*]
[2019-06-26 22:23:48.101]  - 6  INFO [localhost-startStop-1] --- FilterRegistrationBean: Mapping filter: 'webRequestLoggingFilter' to: [/*]
[2019-06-26 22:23:48.101]  - 6  INFO [localhost-startStop-1] --- FilterRegistrationBean: Mapping filter: 'corsFilter' to: [/*]
[2019-06-26 22:23:48.102]  - 6  INFO [localhost-startStop-1] --- FilterRegistrationBean: Mapping filter: 'applicationContextIdFilter' to: [/*]
[2019-06-26 22:23:48.466]  - 6  WARN [main] --- CuratorZookeeperClient: session timeout [5000] is less than connection timeout [15000]
[2019-06-26 22:23:48.547]  - 6  INFO [main] --- CuratorFrameworkImpl: Starting
[2019-06-26 22:23:48.570]  - 6  INFO [main] --- ZooKeeper: Client environment:zookeeper.version=3.4.8--1, built on 02/06/2016 03:18 GMT
[2019-06-26 22:23:48.571]  - 6  INFO [main] --- ZooKeeper: Client environment:host.name=8a20e8425578
[2019-06-26 22:23:48.571]  - 6  INFO [main] --- ZooKeeper: Client environment:java.version=1.8.0_111
[2019-06-26 22:23:48.571]  - 6  INFO [main] --- ZooKeeper: Client environment:java.vendor=Oracle Corporation
[2019-06-26 22:23:48.571]  - 6  INFO [main] --- ZooKeeper: Client environment:java.home=/usr/lib/jvm/java-8-openjdk-amd64/jre
[2019-06-26 22:23:48.571]  - 6  INFO [main] --- ZooKeeper: Client environment:java.class.path=/kafdrop-2.0.6/kafdrop-2.0.6.jar
[2019-06-26 22:23:48.571]  - 6  INFO [main] --- ZooKeeper: Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib/x86_64-linux-gnu/jni:/lib/x86_64-linux-gnu:/usr/lib/x86_64-linux-gnu:/usr/lib/jni:/lib:/usr/lib
[2019-06-26 22:23:48.571]  - 6  INFO [main] --- ZooKeeper: Client environment:java.io.tmpdir=/tmp
[2019-06-26 22:23:48.572]  - 6  INFO [main] --- ZooKeeper: Client environment:java.compiler=<NA>
[2019-06-26 22:23:48.572]  - 6  INFO [main] --- ZooKeeper: Client environment:os.name=Linux
[2019-06-26 22:23:48.572]  - 6  INFO [main] --- ZooKeeper: Client environment:os.arch=amd64
[2019-06-26 22:23:48.572]  - 6  INFO [main] --- ZooKeeper: Client environment:os.version=4.9.125-linuxkit
[2019-06-26 22:23:48.573]  - 6  INFO [main] --- ZooKeeper: Client environment:user.name=root
[2019-06-26 22:23:48.573]  - 6  INFO [main] --- ZooKeeper: Client environment:user.home=/root
[2019-06-26 22:23:48.573]  - 6  INFO [main] --- ZooKeeper: Client environment:user.dir=/
[2019-06-26 22:23:48.575]  - 6  INFO [main] --- ZooKeeper: Initiating client connection, connectString=localhost:2181,localhost:2181 sessionTimeout=5000 watcher=org.apache.curator.ConnectionState@175c2241
[2019-06-26 22:23:48.628]  - 6  INFO [main-SendThread(localhost:2181)] --- ClientCnxn: Opening socket connection to server localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
[2019-06-26 22:23:48.868]  - 6  WARN [main-SendThread(localhost:2181)] --- ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)

[melchoir55]

solved by using the following run command instead of what is in readme:

docker run -p 9000:9000 -e ZOOKEEPER_CONNECT=docker.for.mac.localhost:2181 kafdrop