DocValue not replicated

[Felton Fei]

Hi,
I have SOLR 4.9 with master/slave architecture. And I use DocValue for
custom ranking. After I update doc on master, it looks like the DocValue not
get replicated to slave. After I wait for next poll from slave, it¹s OK. Is
there a delay of replicate or loading of DocValues?
Thanks a lot!