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java.lang.IllegalArgumentException: Credentials may not be null	at org.apache.http.util.Args.notNull(Args.java:54)	at org.apache.http.auth.AuthState.update(AuthState.java:113)	at org.fcrepo.client.FcrepoHttpClientBuilder$PreemptiveAuthInterceptor.process(FcrepoHttpClientBuilder.java:117)	at org.apache.http.protocol.ImmutableHttpProcessor.process(ImmutableHttpProcessor.java:132)	at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:182)	at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:88)	at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110)	at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184)	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:107)	at org.fcrepo.client.FcrepoClient.executeRequest(FcrepoClient.java:268)	at org.fcrepo.client.FcrepoClient.head(FcrepoClient.java:96)	at org.fcrepo.camel.FcrepoProducer.getMetadataUri(FcrepoProducer.java:158)	at org.fcrepo.camel.FcrepoProducer.doRequest(FcrepoProducer.java:141)	at org.fcrepo.camel.FcrepoProducer.process(FcrepoProducer.java:99)	at org.apache.camel.util.AsyncProcessorConverterHelper$ProcessorToAsyncProcessorBridge.process(AsyncProcessorConverterHelper.java:61)	at org.apache.camel.processor.SendProcessor.process(SendProcessor.java:141)	at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:77)	at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:460)	at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:190)	at org.apache.camel.processor.Pipeline.process(Pipeline.java:121)	at org.apache.camel.processor.Pipeline.process(Pipeline.java:83)	at org.apache.camel.processor.FilterProcessor.process(FilterProcessor.java:57)	at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:77)	at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:460)	at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:190)	at org.apache.camel.processor.Pipeline.process(Pipeline.java:121)	at org.apache.camel.processor.Pipeline.process(Pipeline.java:83)	at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:190)	at org.apache.camel.component.direct.DirectProducer.process(DirectProducer.java:62)	at org.apache.camel.processor.SendProcessor.process(SendProcessor.java:141)	at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:77)	at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:460)	at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:190)	at org.apache.camel.processor.ChoiceProcessor.process(ChoiceProcessor.java:117)	at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:77)	at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:460)	at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:190)	at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:190)	at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:109)	at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:87)	at org.apache.camel.component.jms.EndpointMessageListener.onMessage(EndpointMessageListener.java:112)	at org.springframework.jms.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:544)	at org.springframework.jms.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:504)	at org.springframework.jms.listener.AbstractMessageListenerContainer.doExecuteListener(AbstractMessageListenerContainer.java:474)	at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute(AbstractPollingMessageListenerContainer.java:325)	at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute(AbstractPollingMessageListenerContainer.java:263)	at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.invokeListener(DefaultMessageListenerContainer.java:1103)	at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.executeOngoingLoop(DefaultMessageListenerContainer.java:1095)	at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:992)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)