ADDITIONAL SYSTEM INFORMATION :
OS : Windows 10
Java Runtime :

C:\Users\dbgud>java -version
java version "1.8.0_211"
Java(TM) SE Runtime Environment (build 1.8.0_211-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.211-b12, mixed mode)

A DESCRIPTION OF THE PROBLEM :
comparing max value of Long type variable makes an error,

Let's see the code:

long a = 9223372036854775807L;
long b = 9223372036854775807L;
System.out.println(a == b);

this returns true;

but,
Long a = 9223372036854775807L;
Long b = 9223372036854775807L;
System.out.println(a == b);

this returns false

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
run the code below:

Long a = 9223372036854775807L;
Long b = 9223372036854775807L;
System.out.println(a == b);

ACTUAL -
false

CUSTOMER SUBMITTED WORKAROUND :
changing type of variable from Long to long

FREQUENCY : always