MergeRecord can not guarantee the ordering of the input sequence?

[王磊]

If  FlowFile A, B, C enter the MergeRecord sequentially, the output should be 
one FlowFile {A, B, C}
However, when testing with  large data volume, sometimes the output order will 
be not the same as they enter. And this result is nondeterministic


This really confuses me a lot.
Anybody has any insight on this?


Thanks，
Lei