HotRod digest-md5 auth fails with NPE

<authentication>
    <local default-user="$local" allowed-users="*"/>
    <properties path="application-users.properties" relative-to="jboss.server.config.dir" plain-text="true"/>
</authentication>

org.infinispan.client.hotrod.exceptions.TransportException:: Could not fetch transport
        at org.infinispan.client.hotrod.impl.transport.tcp.TcpTransportFactory.borrowTransportFromPool(TcpTransportFactory.java:310)
        at org.infinispan.client.hotrod.impl.transport.tcp.TcpTransportFactory.getTransport(TcpTransportFactory.java:185)
        at org.infinispan.client.hotrod.impl.operations.FaultTolerantPingOperation.getTransport(FaultTolerantPingOperation.java:27)
        at org.infinispan.client.hotrod.impl.operations.RetryOnFailureOperation.execute(RetryOnFailureOperation.java:48)
        at org.infinispan.client.hotrod.impl.RemoteCacheImpl.ping(RemoteCacheImpl.java:535)
        at org.infinispan.client.hotrod.RemoteCacheManager.ping(RemoteCacheManager.java:633)
        at org.infinispan.client.hotrod.RemoteCacheManager.createRemoteCache(RemoteCacheManager.java:614)
        at org.infinispan.client.hotrod.RemoteCacheManager.getCache(RemoteCacheManager.java:525)
        at org.infinispan.client.hotrod.RemoteCacheManager.getCache(RemoteCacheManager.java:521)
        at org.infinispan.server.test.client.hotrod.security.HotRodSaslAuthTestBase.initialize(HotRodSaslAuthTestBase.java:55)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
        at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
        at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
        at org.jboss.arquillian.junit.Arquillian$StatementLifecycleExecutor.invoke(Arquillian.java:351)
        at org.jboss.arquillian.container.test.impl.execution.ClientBeforeAfterLifecycleEventExecuter.execute(ClientBeforeAfterLifecycleEventExecuter.java:99)
        at org.jboss.arquillian.container.test.impl.execution.ClientBeforeAfterLifecycleEventExecuter.on(ClientBeforeAfterLifecycleEventExecuter.java:72)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.jboss.arquillian.core.impl.ObserverImpl.invoke(ObserverImpl.java:90)
        at org.jboss.arquillian.core.impl.EventContextImpl.invokeObservers(EventContextImpl.java:99)
        at org.jboss.arquillian.core.impl.EventContextImpl.proceed(EventContextImpl.java:81)
        at org.jboss.arquillian.container.test.impl.client.ContainerEventController.createContext(ContainerEventController.java:142)
        at org.jboss.arquillian.container.test.impl.client.ContainerEventController.createBeforeContext(ContainerEventController.java:124)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.jboss.arquillian.core.impl.ObserverImpl.invoke(ObserverImpl.java:90)
        at org.jboss.arquillian.core.impl.EventContextImpl.proceed(EventContextImpl.java:88)
        at org.jboss.arquillian.test.impl.TestContextHandler.createTestContext(TestContextHandler.java:89)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.jboss.arquillian.core.impl.ObserverImpl.invoke(ObserverImpl.java:90)
        at org.jboss.arquillian.core.impl.EventContextImpl.proceed(EventContextImpl.java:88)
        at org.jboss.arquillian.test.impl.TestContextHandler.createClassContext(TestContextHandler.java:75)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.jboss.arquillian.core.impl.ObserverImpl.invoke(ObserverImpl.java:90)
        at org.jboss.arquillian.core.impl.EventContextImpl.proceed(EventContextImpl.java:88)
        at org.jboss.arquillian.test.impl.TestContextHandler.createSuiteContext(TestContextHandler.java:60)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.jboss.arquillian.core.impl.ObserverImpl.invoke(ObserverImpl.java:90)
        at org.jboss.arquillian.core.impl.EventContextImpl.proceed(EventContextImpl.java:88)
        at org.jboss.arquillian.core.impl.ManagerImpl.fire(ManagerImpl.java:135)
        at org.jboss.arquillian.core.impl.ManagerImpl.fire(ManagerImpl.java:115)
        at org.jboss.arquillian.test.impl.EventTestRunnerAdaptor.before(EventTestRunnerAdaptor.java:95)
        at org.jboss.arquillian.junit.Arquillian$4.evaluate(Arquillian.java:222)
        at org.jboss.arquillian.junit.Arquillian.multiExecute(Arquillian.java:314)
        at org.jboss.arquillian.junit.Arquillian.access$100(Arquillian.java:46)
        at org.jboss.arquillian.junit.Arquillian$5.evaluate(Arquillian.java:240)
        at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
        at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
        at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
        at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
        at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
        at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
        at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
        at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
        at org.jboss.arquillian.junit.Arquillian$2.evaluate(Arquillian.java:185)
        at org.jboss.arquillian.junit.Arquillian.multiExecute(Arquillian.java:314)
        at org.jboss.arquillian.junit.Arquillian.access$100(Arquillian.java:46)
        at org.jboss.arquillian.junit.Arquillian$3.evaluate(Arquillian.java:199)
        at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
        at org.jboss.arquillian.junit.Arquillian.run(Arquillian.java:147)
        at org.junit.runners.Suite.runChild(Suite.java:127)
        at org.junit.runners.Suite.runChild(Suite.java:26)
        at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
        at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
        at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
        at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
        at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
        at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
        at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
        at org.junit.runner.JUnitCore.run(JUnitCore.java:138)
        at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.execute(JUnitCoreWrapper.java:62)
        at org.apache.maven.surefire.junitcore.JUnitCoreProvider.invoke(JUnitCoreProvider.java:139)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
        at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
        at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
        at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
        at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)
Caused by: java.lang.NullPointerException
        at org.infinispan.client.hotrod.impl.transport.AbstractTransport.writeArray(AbstractTransport.java:97)
        at org.infinispan.client.hotrod.impl.operations.AuthOperation.execute(AuthOperation.java:35)
        at org.infinispan.client.hotrod.impl.transport.tcp.SaslTransportObjectFactory.auth(SaslTransportObjectFactory.java:99)
        at org.infinispan.client.hotrod.impl.transport.tcp.SaslTransportObjectFactory.makeObject(SaslTransportObjectFactory.java:72)
        at org.infinispan.client.hotrod.impl.transport.tcp.SaslTransportObjectFactory.makeObject(SaslTransportObjectFactory.java:25)
        at org.apache.commons.pool.impl.GenericKeyedObjectPool.borrowObject(GenericKeyedObjectPool.java:1220)
        at org.infinispan.client.hotrod.impl.transport.tcp.TcpTransportFactory.borrowTransportFromPool(TcpTransportFactory.java:306)
        ... 98 more