pnowojski commented on issue #11751: [FLINK-16587][network] Provide the method 
for getting unconsumed buffer from RecordDeserializer
URL: https://github.com/apache/flink/pull/11751#issuecomment-614003050
 
 
   I applied your changes @AHeise . I also have found & fixed another bug. Take 
a look at the new `testLargeSpanningRecordUnconsumedBufferWithLeftOverBytes` 
test case and modified 
`org.apache.flink.runtime.io.network.api.serialization.SpillingAdaptiveSpanningRecordDeserializer.SpanningWrapper#getUnconsumedSegment`
   ```
   } else if (recordLength != -1) {
                                int leftOverSize = leftOverLimit - 
leftOverStart;
                                int unconsumedSize = Integer.BYTES + 
accumulatedRecordBytes + leftOverSize;
                                DataOutputSerializer serializer = new 
DataOutputSerializer(unconsumedSize);
                                serializer.writeInt(recordLength);
                                serializer.write(buffer, 0, 
accumulatedRecordBytes);
                                if (leftOverSize > 0) {
                                        
serializer.write(checkNotNull(leftOverData), leftOverStart, leftOverSize);
                                }
                                MemorySegment segment = 
MemorySegmentFactory.allocateUnpooledSegment(unconsumedSize);
                                segment.put(0, serializer.getSharedBuffer(), 0, 
segment.size());
                                return Optional.of(segment);
                        }
   ``` 
   branch

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