[SPARK-2354] BitSet Range Expanded when creating new one

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Not A Problem
• Affects Version/s: 1.0.0, 1.1.0
• Component/s: Spark Core
• Assignee: Unassigned
• Reporter: Yijie Shen
• Created: 03/Jul/14 16:21
• Updated: 03/Aug/14 05:33
• Resolved: 03/Aug/14 05:33

Description

BitSet has a constructor parameter named "numBits: Int" and indicate the bit num inside.
And also, there is a function called "capacity" which represents the long words number to hold the bits.

When creating new BitSet,for example in '|', I thought the new created one shouldn't be the size of longer words' length, instead, it should be the longer set's num of bit

def |(other: BitSet): BitSet = {
    val newBS = new BitSet(math.max(numBits, other.numBits)) 
// I know by now the numBits isn't a field

Does it have any other reason to expand the BitSet range I don't know?