shfshihuafeng commented on code in PR #2889:
URL: https://github.com/apache/drill/pull/2889#discussion_r1529743261
##########
exec/java-exec/src/main/java/org/apache/drill/exec/cache/VectorAccessibleSerializable.java:
##########
@@ -155,12 +157,18 @@ public void readFromStreamWithContainer(VectorContainer
myContainer, InputStream
for (SerializedField metaData : fieldList) {
final int dataLength = metaData.getBufferLength();
final MaterializedField field = MaterializedField.create(metaData);
- final DrillBuf buf = allocator.buffer(dataLength);
- final ValueVector vector;
+ DrillBuf buf = null;
+ ValueVector vector = null;
try {
+ buf = allocator.buffer(dataLength);
buf.writeBytes(input, dataLength);
vector = TypeHelper.getNewVector(field, allocator);
vector.load(metaData, buf);
+ } catch (OutOfMemoryException oom) {
+ for (ValueVector valueVector : vectorList) {
+ valueVector.clear();
+ }
+ throw UserException.memoryError(oom).message("Allocator memory
failed").build(logger);
Review Comment:
when we prepare to allocator memory using "allocator.buffer(dataLength)"
for hashjoinPop allocator, if actual memory > maxAllocation(The parameter is
calculated by call computeOperatorMemory) ,then it throw exception, like
following my test。
user can adjust directMemory parameters (DRILL_MAX_DIRECT_MEMORY) or
reduce concurrency based on actual conditions.
**throw exception code**
```
public DrillBuf buffer(final int initialRequestSize, BufferManager manager) {
assertOpen();
AllocationOutcome outcome = allocateBytes(actualRequestSize);
if (!outcome.isOk()) {
throw new OutOfMemoryException(createErrorMsg(this, actualRequestSize,
initialRequestSize));
}
```
**my test scenario**
```
Caused by: org.apache.drill.exec.exception.OutOfMemoryException: Unable to
allocate buffer of size 16384 (rounded from 14359) due to memory limit
(41943040). Current allocation: 22583616
at
org.apache.drill.exec.memory.BaseAllocator.buffer(BaseAllocator.java:241)
at
org.apache.drill.exec.memory.BaseAllocator.buffer(BaseAllocator.java:216)
at
org.apache.drill.exec.cache.VectorAccessibleSerializable.readFromStreamWithContainer(VectorAccessibleSerializable.java:172)
```
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