Should thread blocked by java NIO Selector.select() be considered waiting or running

Question

The documentation of selectorObj.select() method states

This method performs a blocking selection operation. It returns only after at l

Answer 1

When the thread is blocked in an I/O call, it is still running as far as Java thread is concerned.

Most profilers simply show thread state, which is defined as,

• NEW A thread that has not yet started is in this state.
• RUNNABLE A thread executing in the Java virtual machine is in this state.
• BLOCKED A thread that is blocked waiting for a monitor lock is in this state.
• WAITING A thread that is waiting indefinitely for another thread to perform a particular action is in this state.
• TIMED_WAITING A thread that is waiting for another thread to perform an action for up to a specified waiting time is in this state.
• TERMINATED A thread that has exited is in this state.

As you can see, thread's WAITING/BLOCKED state has nothing to do with I/O.