java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at com.atlassian.seraph.auth.DefaultAuthenticator.getUserFromBasicAuthentication(DefaultAuthenticator.java:501)
at com.atlassian.seraph.auth.DefaultAuthenticator.getUser(DefaultAuthenticator.java:280)
at com.atlassian.seraph.auth.AbstractAuthenticator.getUser(AbstractAuthenticator.java:45)
at com.atlassian.seraph.filter.BaseLoginFilter$SecurityHttpRequestWrapper.getUserPrincipal(BaseLoginFilter.java:216)
at com.atlassian.seraph.filter.BaseLoginFilter$SecurityHttpRequestWrapper.getRemoteUser(BaseLoginFilter.java:210)
at com.atlassian.bamboo.filter.AccessLogFilter.getStartText(AccessLogFilter.java:86)
at com.atlassian.bamboo.filter.AccessLogFilter.doFilter(AccessLogFilter.java:62)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at com.atlassian.bamboo.filter.BambooAcegiProxyFilter.doFilter(BambooAcegiProxyFilter.java:21)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at com.atlassian.bamboo.filter.LicenseFilter.doFilter(LicenseFilter.java:73)
at com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at com.atlassian.johnson.filters.AbstractJohnsonFilter.doFilter(AbstractJohnsonFilter.java:72)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at com.atlassian.seraph.filter.SecurityFilter.doFilter(SecurityFilter.java:101)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at com.atlassian.seraph.filter.BaseLoginFilter.doFilter(BaseLoginFilter.java:140)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:49)
at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:41)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at com.atlassian.bamboo.persistence.BambooSessionInViewFilter.doFilterInternal(BambooSessionInViewFilter.java:27)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at com.atlassian.bamboo.filter.CompressingFilter.doFilter(CompressingFilter.java:73)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at com.atlassian.bamboo.filter.RequestCacheThreadLocalFilter.doFilter(RequestCacheThreadLocalFilter.java:31)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:49)
at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:41)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:190)
at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:774)
at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:703)
at java.lang.Thread.run(Thread.java:619)

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