A DESCRIPTION OF THE PROBLEM :
Calling the isDone method returns false, but Callable is running. This is easily detected when the task is time-consuming

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1、Create a thread pool through Executors and submit a time-consuming task.
2、Call the isDone of the returned Future, and the return result is false

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The submitted task has not started execution.
ACTUAL -
The submitted task is currently executing.

CUSTOMER SUBMITTED WORKAROUND :
Increase the RUNNING status between NEW and COMPLETING.

FREQUENCY : always