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From Josh Elser <>
Subject Re: Unable to get Mini to use native maps - 1.6.2
Date Tue, 23 Feb 2016 17:27:23 GMT
Hi Dan,

I'm seeing in our internal integration tests that we have some 
configuration happening which (at least, intends to) configure the 
native maps for the minicluster.

If you're not familiar, the MiniAccumuloConfig and MiniAccumuloCluster 
classes are thin wrappers around MiniAccumuloConfigImpl and 
MiniAccumuloClusterImpl. There is a setNativeLibPaths method on 
MiniAccumuloConfigImpl which you can use to provide the path to the 
native library shared object (.so). You will probably have to switch 
from MiniAccumuloConfig/MiniAccumuloCluster to 
MiniAccumuloConfigImpl/MiniAccumuloClusterImpl to use the "hidden" methods.

You could also look at in >=1.7 if you want a 
concrete example of how we initialize things for our tests.

- Josh

Dan Blum wrote:
> In order to test to make sure we don't have more code that needs a
> workaround for I am
> trying again to enable the native maps for Mini, which we use for testing.
> I set tserver.memory.maps.native.enabled to true in the site XML, and this
> is getting picked up since I see this in the Mini logs:
> [server.Accumulo] INFO : tserver.memory.maps.native.enabled = true
> However, NativeMap should log something when it tries to load the library,
> whether it succeeds or fails, but it logs nothing. The obvious conclusion is
> that something about how MiniAccumuloCluster starts means that this setting
> is ignored or overridden, but I am not finding it. (I see the mergeProp call
> in MiniAccumuloConfigImpl.initialize which will set TSERV_NATIVEMAP_ENABLED
> to false, but that should only set it if it's not already in the properties,
> which it should be, and as far as I can tell the log message above is issued
> after this.)

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