Fangzhou created ARROW-198:
------------------------------
Summary: OutOfMemoryError for vector test case
Key: ARROW-198
URL: https://issues.apache.org/jira/browse/ARROW-198
Project: Apache Arrow
Issue Type: Bug
Components: Java - Memory, Java - Vectors
Reporter: Fangzhou
When executing vector component junit-test class TestValueVector,exception can
be seen.
Exception:
java.lang.Exception: Unexpected exception,
expected<org.apache.arrow.vector.util.OversizedAllocationException> but
was<org.apache.arrow.memory.OutOfMemoryException>
where the issue comes from:
public void testFixedVectorReallocation() {
....
try {
vector.allocateNew(expectedValueCapacity); <-- where the exception
comes from
....
analysis:
allocateNew will invoke classes from io.netty.buffer from memory component and
finally invoke netty third party package.I assume there is no issue when
invoking memory part.Then I trace that the issue is caused by oversizing
value of initialCapacity setting when invoking AbstractByteBufAllocator class
in third party netty-buffer-4.0.27.final.jar. I create a test case which can
reproduces the issue. value of parameter initialCapacity and maxCapacity are
obtained from debugged
public void testAllocator(){
int initialCapacity=2147483644;
int maxCapacity=2147483647;
ByteBuf buf =
UnpooledByteBufAllocator.DEFAULT.directBuffer(initialCapacity, maxCapacity);
}
And I checked the rooted affected class java.nio.Bits:
static void reserveMemory(long size, int cap) {
.....
if (totalCapacity + cap > maxMemory)
throw new OutOfMemoryError("Direct buffer memory");
.....
maxMemory can only be set to 1836056576 at most,but initialCapacity was
2147483644 at this moment.
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