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java.lang.NullPointerException: 	at org.alfresco.web.site.servlet.SlingshotAlfrescoConnector.applyRequestHeaders(SlingshotAlfrescoConnector.java:196)	at org.springframework.extensions.webscripts.connector.HttpConnector.initRemoteClient(HttpConnector.java:269)	at org.springframework.extensions.webscripts.connector.HttpConnector.call(HttpConnector.java:67)	at org.springframework.extensions.webscripts.RequestCachingConnector.call(RequestCachingConnector.java:90)	at org.alfresco.web.site.servlet.SSOAuthenticationFilter.challengeOrPassThrough(SSOAuthenticationFilter.java:839)	at org.alfresco.web.site.servlet.SSOAuthenticationFilter.doFilter(SSOAuthenticationFilter.java:539)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)	at org.apache.coyote.ajp.AjpAprProcessor.process(AjpAprProcessor.java:188)	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)	at org.apache.tomcat.util.net.AprEndpoint$SocketWithOptionsProcessor.run(AprEndpoint.java:2403)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)	at java.lang.Thread.run(Thread.java:745)