[jira] [Updated] (GIRAPH-1068) Make Zookeeper accept 0 as a port number and let it choose any available free port

["Sergey Edunov (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/GIRAPH-1068?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sergey Edunov updated GIRAPH-1068:
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    Summary: Make Zookeeper accept 0 as a port number and let it choose any available free port  (was: Make Zookeeper accept 0 as a port number and let it choose free available port)

> Make Zookeeper accept 0 as a port number and let it choose any available free port
> ----------------------------------------------------------------------------------
>
>                 Key: GIRAPH-1068
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-1068
>             Project: Giraph
>          Issue Type: Task
>            Reporter: Sergey Edunov
>            Assignee: Sergey Edunov
>
> We have a few use cases where having zookeeper bound to specific port is very inconvenient. 
> 1) Unit tests that run in parallel. 
> 2) Shared clusters where multiple giraph instances can run on the same machines. 
> In theory we don't need to know what port zookeeper will run on. In most cases we're fine with any port available. 
> Picking any available port is currently supported by the server socket, but is not supported in the code that parses zookeper configs (this code lives in zookeper). 
> We don't have to parse configs though, as we have a way to run zookeper in process. And in that case we can have a full control on how zookeeper is initialized. 
> For this task I want to allow 0 as a port number for zookeeper. Which will allow us to run zookeeper on any available port. And I will also remove "out of process" zookeeper, as it clearly provides no benefits to us.  
> Note: it will still be possible to run external zookeper, if you have it running somewhere as a service. 



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