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[8.6] Clean up on exception while chunking XContent (#92024) #92031

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Nov 30, 2022
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[8.6] Clean up on exception while chunking XContent (#92024) #92031

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5 changes: 5 additions & 0 deletions docs/changelog/92024.yaml
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
pr: 92024
summary: Clean up on exception while chunking XContent
area: Network
type: bug
issues: []
37 changes: 25 additions & 12 deletions server/src/main/java/org/elasticsearch/rest/ChunkedRestResponseBody.java
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,7 @@
import org.elasticsearch.common.recycler.Recycler;
import org.elasticsearch.common.xcontent.ChunkedToXContent;
import org.elasticsearch.core.IOUtils;
import org.elasticsearch.core.Releasables;
import org.elasticsearch.core.Streams;
import org.elasticsearch.xcontent.ToXContent;
import org.elasticsearch.xcontent.XContentBuilder;
Expand Down Expand Up @@ -92,20 +93,32 @@ public boolean isDone() {

@Override
public ReleasableBytesReference encodeChunk(int sizeHint, Recycler<BytesRef> recycler) throws IOException {
final RecyclerBytesStreamOutput chunkStream = new RecyclerBytesStreamOutput(recycler);
assert this.target == null;
this.target = chunkStream;
while (serialization.hasNext()) {
serialization.next().toXContent(builder, params);
if (chunkStream.size() >= sizeHint) {
break;
try {
final RecyclerBytesStreamOutput chunkStream = new RecyclerBytesStreamOutput(recycler);
assert target == null;
target = chunkStream;
while (serialization.hasNext()) {
serialization.next().toXContent(builder, params);
if (chunkStream.size() >= sizeHint) {
break;
}
}
if (serialization.hasNext() == false) {
builder.close();
}
final var result = new ReleasableBytesReference(
chunkStream.bytes(),
() -> Releasables.closeExpectNoException(chunkStream)
);
target = null;
return result;
} finally {
if (target != null) {
assert false : "failure encoding chunk";
IOUtils.closeWhileHandlingException(target);
target = null;
}
}
if (serialization.hasNext() == false) {
builder.close();
}
this.target = null;
return new ReleasableBytesReference(chunkStream.bytes(), () -> IOUtils.closeWhileHandlingException(chunkStream));
}

@Override
Expand Down