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https://issues.apache.org/jira/browse/HDDS-839?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16693477#comment-16693477
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Arpit Agarwal commented on HDDS-839:
------------------------------------

Thanks for this improvement [~elek]. It looks like we are removing the 15 
second sleep for OM, but WAITFOR is not being set. Will that be in a separate 
patch?
{code}
-      # To make sure SCM is running in dockerized environment we will sleep
-      # Could be removed after HDFS-13203
-      echo "Waiting 15 seconds for SCM startup"
-      sleep 15
{code}

> Wait for other services in the started script of hadoop-runner base docker 
> image
> --------------------------------------------------------------------------------
>
>                 Key: HDDS-839
>                 URL: https://issues.apache.org/jira/browse/HDDS-839
>             Project: Hadoop Distributed Data Store
>          Issue Type: Sub-task
>            Reporter: Elek, Marton
>            Assignee: Elek, Marton
>            Priority: Major
>         Attachments: HDDS-839-docker-hadoop-runner.001.patch, 
> HDDS-839-docker-hadoop-runner.002.patch
>
>
> As described in the parent issue, we need a simple method to handle service 
> dependencies in kubernetes clusters (usually as a workaround when some 
> clients can't re-try with renewed dns information).
> But it also could be useful to minimize the wait time in the docker-compose 
> clusters.
> The easiest implementation is modifying the started script of the 
> apache/hadoop-runner base image and add a bash loop which checks the 
> availability of the TCP port (with netcat). 



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