[jira] [Created] (ARROW-11223) BaseVariableWidthVector setNull and getBufferSizeFor is buggy, may get error java.lang.IndexOutOfBoundsException: index: 15880, length: 4 (expected: range(0, 15880))

[Weichen Xu (Jira)]

Weichen Xu created ARROW-11223:
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             Summary: BaseVariableWidthVector setNull and getBufferSizeFor is 
buggy, may get error  java.lang.IndexOutOfBoundsException: index: 15880, 
length: 4 (expected: range(0, 15880))
                 Key: ARROW-11223
                 URL: https://issues.apache.org/jira/browse/ARROW-11223
             Project: Apache Arrow
          Issue Type: Bug
          Components: Java
    Affects Versions: 0.15.1
            Reporter: Weichen Xu



I test on arrow 0.15.1

Reproduce code in scala:

{code: scala}

import org.apache.arrow.vector.VarCharVector
import org.apache.arrow.memory.RootAllocator
val rootAllocator = new RootAllocator(Long.MaxValue)
val v1 = new VarCharVector("var1", rootAllocator)
v1.allocateNew()

val valueCount = 3970 // use any number >= 3970 will get similar error

for (idx <- 0 until valueCount) {
  v1.setNull(idx)
}
v1.getBufferSizeFor(valueCount) # failed, get error 
java.lang.IndexOutOfBoundsException: index: 15880, length: 4 (expected: 
range(0, 15880))

{code}



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