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From Josh Elser <>
Subject Re: Mini Accumulo Cluster reusing the directory
Date Wed, 16 Sep 2015 16:17:02 GMT
Best as I can tell, we don't actually have the ability to do this.

We can use external ZooKeeper servers and we can start a MAC instance on 
top of an already running ZK from a different MAC instance, but it 
doesn't look like we have the ability to reuse the same storage directory.

That sounds like a useful improvement to me. I'm not sure if there are 
any edge cases that make this hard (haven't thought enough about it).

Want to open a JIRA issue for it, Sven?

- Josh

Sven Hodapp wrote:
> Hi there,
> is it possible for MiniAccumuloCluster to reuse a given directory?
> Sadly, I haven't found anything in the docs?
> I’ll fire up my instance like this:
>     val dict = new File("/tmp/accumulo-mini-cluster")
>     val accumulo = new MiniAccumuloCluster(dict, "test“)
> If I’ll restart my JVM it will raise a error like this:
>     Exception in thread "main" java.lang.IllegalArgumentException: Directory /tmp/accumulo-mini-cluster
is not empty
> It would be nice if the data can survive a JVM restart and the folder structure must
not be constructed every time.
> Thanks a lot!
> Regards,
> Sven

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