add referrer java.lang.NullPointerException

2007-01-16 19:32:15,015 ERROR [DefaultQuartzScheduler_Worker-8] [atlassian.confluence.links.ReferralTaskQueue] flush Unable to add referrer http://10.70.172.71:8080/confluence/pages/viewpageattachments.action?pageId=2 - null
java.lang.NullPointerException
at java.lang.String.startsWith(String.java:1252)
at java.lang.String.startsWith(String.java:1281)
at com.atlassian.confluence.links.DefaultReferralManager.isReferringRequest(DefaultReferralManager.java:142)
at com.atlassian.confluence.links.DefaultReferralManager.referToContent(DefaultReferralManager.java:131)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:284)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:155)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:122)
at com.atlassian.spring.interceptors.SpringProfilingInterceptor.invoke(SpringProfilingInterceptor.java:20)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:144)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:56)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:144)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:174)
at $Proxy34.referToContent(Unknown Source)
at com.atlassian.confluence.links.ReferralTask.execute(ReferralTask.java:27)
at com.atlassian.confluence.links.ReferralTaskQueue.flush(ReferralTaskQueue.java:69)