FULL PRODUCT VERSION :


ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 10.0.10586]

A DESCRIPTION OF THE PROBLEM :
The ThreadedSeedGenerator class contains the following code:

// We wait 250milli quanta, so the minimum wait time
// cannot be under 250milli.
int latch = 0;
long l = System.currentTimeMillis() + 250;
while (System.currentTimeMillis() < l) {
    synchronized(this){};
    latch++;
}

Since it uses System.currentTimeMillis for the wait, which reflects the actual system time, moving back the system time will cause this code to wait a lot longer.

In my case, calling createTempFile hangs for 2 hours after changing back the system time for 2 hours... Perhaps use System.nanoTime for this wait?


REPRODUCIBILITY :
This bug can be reproduced occasionally.