Venki Korukanti created DRILL-2088:
--------------------------------------
Summary: BitVector.Mutator.setValueCount() fails with invalid
buffer access
Key: DRILL-2088
URL: https://issues.apache.org/jira/browse/DRILL-2088
Project: Apache Drill
Issue Type: Bug
Reporter: Venki Korukanti
Run the following physical plan:
{code}
{
head:{
type:"APACHE_DRILL_PHYSICAL",
version:"1",
generator:{
type:"manual"
}
},
graph:[
{
@id:1,
pop:"mock-scan",
url: "http://apache.org";,
entries:[
{records: 100, types: [
{name: "blue", type: "BIT", mode: "REQUIRED"},
{name: "red", type: "BIGINT", mode: "REQUIRED"},
{name: "green", type: "INT", mode: "OPTIONAL"}
]}
]
},
{
@id:2,
child: 1,
pop:"selection-vector-remover"
},
{
@id: 3,
child: 2,
pop: "screen"
}
]
}
{code}
It fails with:
{code}
Failure while running fragment., index: 0, length: 8192 (expected: range(0,
1024))
{code}
Couple of issues:
1. We don't transfer valueCapacity as part of TransferPair.transfer(). This
causes the vector that got the buffers to have 0 as valueCapacity. During the
realloc of vector that got the buffer, we rely on valueCapacity to decide
whether to realloc or not.
2. When BitVector.Mutator.setValueCount() is called we try to reallocate the
buffer as the valueCapacity is zero. As part of realloc, we allocate a buffer
of size 1028bytes and try to copy the existing buffer. Problem is existing
buffer has size more than 1028bytes and we fail in copying.
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