spring - An Authentication object was not found in the SecurityContext -

1. i have application exporting web services, configured spring security securityfilterchain (with securitycontextpersistencefilter among others, required rest).
2. my application uses spring security secure method invocations.

i have following error when method security triggered:

org.springframework.security.authentication.authenticationcredentialsnotfoundexception: authentication object not found in securitycontext 

the 2nd part requires authentication in securitycontextholder showed in org.springframework.security.access.intercept.abstractsecurityinterceptor (line 195):

securitycontextholder.getcontext().getauthentication(); 

but, securitycontextpersistencefilter removes before method invocation triggered, shown in org.springframework.security.web.context.securitycontextpersistencefilter (line 84)

securitycontextholder.clearcontext(); 

what can have object in securitycontextholder when method invocation triggered?

thank in advance.

i'm using spring security 3.0.8-release

securitycontextholder.clearcontext() called after request processing completion. application logic code executed before line, , there no problem @ all. problem may present if execute new thread in code (by default security context not propogated). if case can try force context propogation child thread. if use 1 thread make sure code covered spring security filter chain (may have custom filter executed around spring security filter chain?).