Mac, Java 1.8.0_05, PowerMock 1.6, Curator 2.7, Zookeeper 3.4.6, Kafka 0.8.2-beta, can't start embedded TestingServer for unit test

[John Boardman]

I am trying to use curator's embedded Zookeeper TestingServer to do my
tests. Here is the simplest generic test class I could come up with that
displays the error. Has anyone seen this?
package com;

import java.io.IOException;
import java.util.Properties;
import kafka.server.KafkaConfig;
import kafka.server.KafkaServerStartable;
import kafka.utils.TestUtils;
import org.apache.curator.test.TestingServer;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.core.classloader.annotations.PowerMockIgnore;
import org.powermock.modules.junit4.PowerMockRunner;

@RunWith(PowerMockRunner.class)
@PowerMockIgnore("javax.management.*")
public class TestMe {
    KafkaServerStartable kafkaServer;
    TestingServer zkServer;

    public TestMe() throws Exception {
        zkServer = new TestingServer();
        KafkaConfig config = getKafkaConfig(zkServer.getConnectString());
        kafkaServer = new KafkaServerStartable(config);
        kafkaServer.startup();
    }

    private static KafkaConfig getKafkaConfig(final String zkConnectString)
{
        scala.collection.Iterator<Properties> propsI =
TestUtils.createBrokerConfigs(1, true).iterator();
        assert propsI.hasNext();
        Properties props = propsI.next();
        assert props.containsKey("zookeeper.connect");
        props.put("zookeeper.connect", zkConnectString);
        return new KafkaConfig(props);
    }

    public String getKafkaBrokerString() {
        return String.format("localhost:%d",
kafkaServer.serverConfig().port());
    }

    public String getZkConnectString() {
        return zkServer.getConnectString();
    }

    public int getKafkaPort() {
        return kafkaServer.serverConfig().port();
    }

    public void stop() throws IOException {
        kafkaServer.shutdown();
        zkServer.stop();
    }

    @Test
    public void test00() throws Exception {
    }
}

The error I am getting is this:

10:29:50.374 [Thread-0] ERROR o.a.c.test.TestingZooKeeperServer - From
testing server (random state: false) for instance:
InstanceSpec{dataDirectory=/var/folders/51/7vtgpj8938j5snr6f49l3qzh0000gn/T/1418315390050-0,
port=58985, electionPort=58986, quorumPort=58987,
deleteDataDirectoryOnClose=true, serverId=1, tickTime=-1,
maxClientCnxns=-1} org.apache.curator.test.InstanceSpec@e669

java.lang.ClassCastException: class sun.security.provider.ConfigFile

at java.lang.Class.asSubclass(Class.java:3293) ~[na:1.8.0_05]

at javax.security.auth.login.Configuration$2.run(Configuration.java:254)
~[na:1.8.0_05]

at javax.security.auth.login.Configuration$2.run(Configuration.java:247)
~[na:1.8.0_05]

at java.security.AccessController.doPrivileged(Native Method) ~[na:1.8.0_05]

at javax.security.auth.login.Configuration.getConfiguration(
Configuration.java:246) ~[na:1.8.0_05]

at org.apache.zookeeper.server.ServerCnxnFactory.configureSaslLogin(
ServerCnxnFactory.java:174) ~[na:3.4.6-1569965]

at org.apache.zookeeper.server.NIOServerCnxnFactory.configure(
NIOServerCnxnFactory.java:87) ~[na:3.4.6-1569965]

at org.apache.zookeeper.server.ZooKeeperServerMain.runFromConfig(
ZooKeeperServerMain.java:111) ~[na:3.4.6-1569965]

at org.apache.curator.test.TestingZooKeeperMain.runFromConfig(
TestingZooKeeperMain.java:73) ~[na:2.7.0]

at org.apache.curator.test.TestingZooKeeperServer$1.run(
TestingZooKeeperServer.java:148) ~[na:2.7.0]