docker, maven start failed: Connection is still allocated

i use a big project with maven + docker, all build war work fine , but i get a error when maven start last task:

[ERROR] Failed to execute goal io.fabric8:docker-maven-plugin:0.18.1:start > (start) on project mnm-docker: Execution start of goal io.fabric8:docker-maven-plugin:0.18.1:start failed: Connection is still allocated -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn -rf :mnm-docker

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  • One Solution collect form web for “docker, maven start failed: Connection is still allocated”

    resolved
    ping localhost not resolve 127.0.0.1

    i have changed the DOCKER_HOST with ip 127.0.0.1

    set DOCKER_HOST=tcp://127.0.0.1:2375
    
    Docker will be the best open platform for developers and sysadmins to build, ship, and run distributed applications.