last empty chunk release

Author: mhl-b

server/src/main/java/org/elasticsearch/rest/RestContentAggregator.java

@@ -167,12 +167,12 @@ static class NoContent implements ChunkHandler {
 
         @Override
         public void onNext(final ReleasableBytesReference lastEmptyChunk, boolean isLast) throws Exception {
-            lastEmptyChunk.close();
             if (lastEmptyChunk.length() == 0 && isLast) {
                 var aggReq = new RestRequest(request, new AggregatedHttpRequest(request.getHttpRequest(), HttpBody.empty()));
                 var aggChan = new AggregatedRestRequestChannel(channel, aggReq);
                 result.accept(aggReq, aggChan);
             } else {
+                lastEmptyChunk.close();
                 request.contentStream().close();
                 channel.sendResponse(new RestResponse(RestStatus.BAD_REQUEST, "unexpected HTTP content"));
             }