How to shut down client with embedded space?

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How do I clean up an embedded space so that my client can exit? Currently Gigaspaces is creating a bunch of non-daemon threads so the application will never exit.

Here's a simple example that never exits:

import org.openspaces.core.GigaSpace; import org.openspaces.core.GigaSpaceConfigurer; import org.openspaces.core.space.UrlSpaceConfigurer;

import com.j_spaces.core.IJSpace;

public class TestGS {

public static void main(String[] args) {
    UrlSpaceConfigurer spaceConfigurer =
        new UrlSpaceConfigurer("/./JUST_KILL_ME?groups=DUMP");
    IJSpace space = spaceConfigurer.space();

    GigaSpace gigaSpace = new GigaSpaceConfigurer(space).gigaSpace();

    gigaSpace.write(new Object());
    gigaSpace.clear(new Object());

    gigaSpace.clean();

    System.out.println("Exiting...");
}

}

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